CMA 56 Reference Manual - User Equipuserequip.com/files/specs/6002/CMA 56.pdf · OMICRON...

CMA 56H A R D W A R E Reference Manual

OMICRON Test Universe

2

Article number VESD0010 - manual version: CMA56.AE.6

© OMICRON electronics 2000. All rights reserved.

The product information, specifications, and all technical data contained within this manual are not

contractually binding. OMICRON reserves the right to make technical changes without announcement.

OMICRON electronics is not to be held liable for statements and declarations given in this manual. The

user is responsible for every application described in this manual. OMICRON electronics explicitly

exonerates itself from all liability for mistakes in this manual. Copying or reproducing this manual,

wholly or in part, is not permitted without the expressed written consent of OMICRON electronics.

Safety Instructions

3

Safety Instructions

ATTENTION: Before starting up the CMA 56, carefully read the following safety instructions.

The system must not be put into operation without full knowledge of this information!

The CMA 56 may only be operated by trained personnel on the company premises.

Current amplifier CMA 56

4

For your safety

• Operate the CMA 56 only with mains supplies with a protective grounding!

• When connecting to the 6mm socket use only test leads with 6mm connectors and plastic jacketing. Always push the plug in as far as it will go. Recommendation: use supplied 6mm plugs.

• With regard to the cross section and length of the test lead, take note to keep the impedance of the leads at a minimum. Recommendation: use test leads with a minimum cross section of 5 mm² and maximum length of 2 m.

• Do not leave any test leads exposed; always disconnect leads at the CMA 56 first!

• The CMA hardware and the CMC hardware should only be turned on or off (by the switch on the front panel), if no test device is connected.

• When connecting and disconnecting the test object make sure that the amplifier is not activated in the software (if the switch in the control software is "On", another automatic sequence will run, a program sequence or a transient output is active, or other signals are connected to the input on the rear panel of the CMA 56 ("Ampl. in")).

• Attention: if the CMA 56 is connected to "Gen. out 1-6" (CMC 56 with s/n <DExxxx: "ext. Ampl.") of a CMC 56 test device the internal current amplifiers of the CMC 56 also supply currents to the corresponding outputs of the CMC 56.

Safety Instructions

5

• Use correct fuse only: T10AH 250V.

• Do not insert conductive parts (screwdrivers etc.) into the sockets.

• Do not operate in a wet or humid environment (condensation).

• Do not operate if an explosion hazard exists.

• Do not operate if you suspect that a hardware fault exists. In this case, please contact OMICRON electronics.

• Take note of the important instructions for proper handling of the CMA 156 before starting it up (page 10).

The device may only be opened at the manufacturer's factory - if irregularities occur, please send it to us. Voltages of up to 500 V will occur inside the unit! If the unit is opened, warranty claims will become void.

If the mains fuse must be replaced (back panel of the device):

First disconnect the mains plug of the CMC test device!

Unscrew the little plastic tile and change the fuse.

Fuse: T10AH 250V.


6

Table of Contents

SAFETY INSTRUCTIONS ................................................................................................................................ 3

TABLE OF CONTENTS .................................................................................................................................... 6

1 INTRODUCTION ....................................................................................................................................... 8

2 START-UP ................................................................................................................................................... 9

2.1 SYSTEM COMPONENTS ........................................................................................................................... 9 2.2 IMPORTANT INSTRUCTIONS .................................................................................................................. 10 2.3 SYSTEM START ..................................................................................................................................... 12 2.4 INSTRUCTIONS FOR CONTROL OF AMPLIFIERS THROUGH THE CMC ..................................................... 16

3 DESIGN AND OPERATION ................................................................................................................... 20

3.1 MODULES ............................................................................................................................................. 20 3.1.1 Hardware Test ............................................................................................................................. 23 3.1.2 Temperature Monitoring .............................................................................................................. 23

4 CONNECTIONS AND INTERFACES.................................................................................................... 24

4.1 CONNECTORS ON THE FRONT PANEL ................................................................................................... 24 4.1.1 6mm Connector ............................................................................................................................ 25

4.2 REAR VIEW ........................................................................................................................................... 28 4.2.1 Mains Fuse ................................................................................................................................... 28 4.2.2 Interface to the CMC Test Device ................................................................................................ 29

5 INCREASING THE OUTPUT POWER ................................................................................................. 34

5.1 PARALLEL CONNECTION OF MORE CMAS ............................................................................................ 34 5.2 SINGLE PHASE OPERATION SERIES CIRCUIT 1,2 (L-L) .......................................................................... 36 5.3 SINGLE PHASE OPERATION PARALLEL CONNECTION 1+2+3 ................................................................ 37

6 STATUS MESSAGES ............................................................................................................................... 38

6.1 OVERLOAD ....................................................................................................................................... 38

7 TECHNICAL DATA ................................................................................................................................. 39

7.1 MAINS SUPPLY ..................................................................................................................................... 39 7.2 OUTPUTS CURRENT 1, 2, 3 .................................................................................................................... 40 7.3 INPUTS "AMPL. IN" ............................................................................................................................... 42 7.4 AMBIENT CONDITIONS.......................................................................................................................... 43

7.4.1 Climate ......................................................................................................................................... 43 7.4.2 Shock and Vibration ..................................................................................................................... 43 7.4.3 Electromagnetic Compatibility (EMC) ........................................................................................ 43

7.5 SAFETY ................................................................................................................................................. 44 7.6 MECHANICAL DATA ............................................................................................................................. 44

Table of Contents

7

8 APPENDIX ................................................................................................................................................. 45

8.1 ORDERING INFORMATION ..................................................................................................................... 45 8.2 MANUFACTURER CONTACT INFORMATION ........................................................................................... 48

9 INDEX ........................................................................................................................................................ 49


8

1 Introduction

The CMA 56 can be controlled from the CMC test device. The current amplifier is housed in the same compact casing as the CMC 56 test device and supplies

3 50A.

Control is effected via an input socket on the back of the device by means of analog signals from the CMC test device. Thus, control of the overall system by means of the easy to use software installed on the PC is retained.

Using the CMA 56 auxiliary amplifier, the OMICRON test system is also able to test relays having higher requirements in terms of output power and currents, so that a wider range of test objects can be tested.

Start-Up

9

2 Start-Up

2.1 System Components

Prior to the start-up please verify that all components have been delivered:

o CMA 56 (amplifier)

o CMA 56 User’s manual

o Accessories:

• Mains cable

• Connection cable CMA 56 CMC test device (l=1 m)

• optional: Connecting cable CMA 56 CMC test device for older CMC 56 test devices.

• 4 connection cables CMA Test object:

(l=1m, =10mm, black, one end open, one end with a 6mm plug)

• Mains fuse: T10AH 250V

• Carrying bag


10

2.2 Important Instructions

Please take note of the following instructions for proper handling of the CMA 56 current amplifier:

• Note the safety instructions!

• Operate the CMA 156 only with mains supplies with a protective grounding!

• Operate the CMA 56 only with a CMC for DOS software version > 2.45.

• The CMA hardware and the CMC hardware should only be turned on or off (by the switch on the front panel), if no test device is connected.

• When connecting and disconnecting the test object make sure that the amplifier is not activated in the software (if the switch in the control software is "On", another automatic sequence will run, a program sequence or a transient output is active, or other signals are connected to the input on the rear panel of the CMA 56 ("Ampl. in")).

• When the CMA 56 is used, make sure that an unobstructed air flow from the ventilation slots on the base panel to those on the rear panel is possible.

Start-Up

11

• For CMC 56 test devices with serial-no < DAxxxx:

If the CMC test system is configured for its internal amplifiers: Do not connect the CMA 56 (with connected test object) to the CMC 56 or leave it connected! The control signals are always present at the Lemo connector at the rear of the CMC 56. When the internal amplifiers are configured, these signals are not calibrated and are therefore invalid.

(For serial-no DAxxxx, the signals at the rear connector of the CMC 56 are suppressed if the internal amplifiers are used.)

• For the position of the sliding switch on the rear panel of the device see the instructions in section 4.2.2.

• Please check that your OMICRON software shows the name and serial number of the CMA 56 (e.g. CMA 56 AJ123N).

Instructions:

If the amplifier is connected to the CMC test device through the interface "Gen. out 7-12", then the CMC reads this, and all other information about the amplifier, automatically through this interface.

For older test devices this interface is not standard, only the "Gen. Out 1-6" (or "ext. Ampl.") interface. If the amplifier is connected to this interface, then the information about the amplifier must be read from an AMP-file. The AMP-file defines the most important parameters of an amplifier (name, current or voltage amplifier, amplification factor, etc.) and is described in Chapter 3 of the CMC DOS Software Handbook.


12

2.3 System Start

The following instructions can be followed step by step if the PC is properly installed and set up.

For CMC for DOS software versions < 2.45:

First install a software version 2.45. The CMA 56 can only be operated with a CMC for DOS software version 2.45 or higher.

The following procedure should be followed for interconnecting the system components:

1. Connect the CMC test device and the PC by means of the 25-pin connecting cable.

2. Connect the CMA 56 and the CMC test device by means of the supplied connecting cable.

1

• CMA 56: socket "Ampl. in." at the back panel.

• CMC test device: Socket "Gen. out 1-6" (optional: "Gen. out 7-12") on the back panel.2

3. Connect CMA 56, CMC test device and PC to the mains supply (cable supplied).

1The supplied cable has the required electromagnetic compatibility. 2For CMC 56 test devices with serial no less DExxxx: socket “ext. Ampl.“ on the back panel.

Start-Up

13

4. Turn all devices ON.

For CMC 56 test devices < DExxxx: always turn the CMC 56 test device ON before connecting the test object (power-ON peak)!

CMA 56:

When the CMA 56 is started, an automatic hardware test is carried out; only after this self-test has been passed, the device turns itself ON. In case of malfunction, a new attempt is made every 8 sec.

Notice: Steps 5 – 7 are not applicable from CMC for DOS V2.8 or OMICRON Windows software, because in this case the amplifier configuration will be done automatically (exception: CMC56 without Gen. Out 7-12 output).

5. After the PC has booted, copy the file xxxxxx.AMP supplied on disc to your CMC directory.

Example: C:\CMC>copy a:AB123Z.AMP

This AMP-file is configured for your CMA.

Delete the CMA standard file CMA.AMP.

Example: C:\CMC>del CMA.AMP).

6. The program is started by typing:

CMC [] Program start.

When the program has completed initialization, you are in the main menu.


14

7. Configuring the CMA 56 as external amplifier for the CMC test device:

When the CMC test device is started up, the internal current amplifiers are always considered to be the active current amplifiers. To control the CMA 56 as amplifier, the device must be specified as the active amplifier in the CONFIGURATION menu.

a) Select menu item Configuration in the main menu and enter the CONFIGURATION menu.

b) Select menu item I-amplifier to enter the selection list of the available current amplifiers and select CMA 56 xxxxxx.

c) Return to the main menu via menu item Quit.

The following message will now appear:

Ext. amplifier: I: CMA 56 xxxxxx.

Now the CMA 56 is configured as an external amplifier for the CMC test device.

Start-Up

15

8. Connecting a test object

Controlsection

suppliedconnection cableCMC CMA 56

CMC Test Device

CMA 56

Voltageamplifier

3 x V over 4 cableswith 4mm plug

measurementlead

3 x I over 4 cableswith 6mm plug

TestObject

Measurementsection

3

Figure 1 Connecting principle CMA 56, CMC test device and test object

• Connect the current rotary system of the CMA 56 to the test object. This may be effected via the individual outputs (1, 2, 3, N).

• If necessary, connect the voltage outputs of the CMC test device to the test object via four cables with 4mm connectors (these are supplied by the user).

• Connect the measuring section of the CMC test device to the test object either via cables with 4mm connectors or via the 20-pin measurement combination connector at the front panel of the CMC test device.

This completes the startup procedure.


16

2.4 Instructions for Control of Amplifiers through the CMC

If your CMC has a "Gen. Out 7-12" Interface:

If your amplifier is connected to this interface it will be automatically identified and offered as an option by the control software used, since communication is possible over this interface. (Supported by CMC for DOS since version 2.70.) This interface is standard on all CMC 156 test devices and can be added to CMC 56 test devices from serial number DAxxxx. See "Ordering Information" page 45.

If your CMC has a "Gen. Out 1-6" interface: There is no communication between the CMC and the amplifier, so the amplifier must be defined by an AMP-file.

If you use a CMC for DOS software version < 2.7:

There is no communication between the CMC and the amplifier, so the amplifier must be defined by an AMP-file.

Significance of the sliding switches:

In the case of the amplifiers being controlled from the CMC for DOS software, the sliding switches indicate whether the current (Position II) or the voltage system (Position I) is to be amplified.

In the case of control by a CM Engine based software (all OMICRON Windows programs are based on CM Engine) the setting of these sliding switches is ignored.

Start-Up

17

6 x I in the CMC for DOS software:

The representation of 2 current systems in the CMC for DOS software is not supported at the time of printing of this manual - the software only displays one current and one voltage system. If 6 currents are to be controlled via the CMC test device, one of the two groups must be operated with the voltage rotary system of the CMC for DOS software. For this purpose, the appropriate AMP file must be set in the CMC for DOS software via the menu items Configuration and V-Amplifier. In the AMP file, enter Voltage for TYPE, 50 for MAX and 10 for AMPLF.

The sliding-switch of the group to be controlled with the voltage system of the CMC for DOS software must be set to position I. For this group, volts will be displayed in the CMC for DOS software instead of amperes. (See AMPLIFIER

10 in the following example, with the instruction Sw.:I, that is sliding switch set to position I.)

If you define your amplifiers with an AMP-file:

An external amplifier can be defined for the CMC by an AMP-file (for older CMC 56s this is the only possibility).

An AMP-file with the same name:

If an amplifier definition in an AMP-file has the same name and serial number as one which has been automatically identified through the "Gen. Out 7-12" interface, then the information from the AMP-file will be ignored by the control software.


18

Example of an AMP-file:

The following example shows an excerpt from a standard AMP-file which would be used with the CMC for DOS software.

(An explanation of the format of the AMP-file may be found in Chapter 3 of the CMC for DOS Software Handbook.)

BEGIN AMPLIFIER9

NAME CMA56 50A Sw. :II

SERNO

TYPE CURRENT

MAX 50

AMPLF 10

PHOFFS 1.07, 1.07, 1.07,50

END AMPLIFIER9

BEGIN AMPLIFIER10

NAME CMA56 50A Sw. :I (6xI)

SERNO

TYPE VOLTAGE

MAX 50

AMPLF 10

PHOFFS 1.07, 1.07, 1.07,50

END AMPLIFIER10

BEGIN AMPLIFIER11

NAME CMA56 CT5:1 10A Sw. :II

SERNO

TYPE CURRENT

MAX 10

AMPLF 2

PHOFFS 1.07, 1.07, 1.07,50

END AMPLIFIER11

Start-Up

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BEGIN AMPLIFIER12

NAME CMA56 4x// 200A Sw. :II

SERNO

TYPE CURRENT

MAX 200

AMPLF 40

PHOFFS 1.07, 1.07, 1.07,50

END AMPLIFIER12


20

3 Design and Operation

3.1 Modules

The amplifier of the CMA 56 current amplifier is isolated from its controller (CMC test device) via an isolation amplifier. This isolation amplifier passes the received signals to a module for signal processing.

The corrected signals (by signal processing) are then passed to the outputs 1-3 at the front panel via the three-phase amplifiers.

A module for self-testing and monitoring carries a hardware test out when it is switched ON and continuously detects the internal temperature of the amplifier. This facility automatically switches the amplifier OFF in the case of overheating.

Furthermore, this module is used to detect an overburden condition or overcurrent at the outputs of the CMA 56.

The information about the current operating state of the CMA 56 is displayed via the LED display on the front panel.

A communication interface is used to communicate with the controlling CMC.

Design and Operation

21

Figure 2: Block diagram CMA 56


22

Explanation of the block diagram

1) 3-phase electronic switch :

Used to select system I or II.

The switch is controlled by the sliding switch at the rear panel of the CMA 56, where system I corresponds to the voltage system and system II corresponds to the current system of the CMC test device.

2) Isolation amplifier for isolation between the inputs and outputs (CMA 56 is isolated from the CMC test device and mains).

3) Signal processing block (filter, offset correction,...)

4) 3-phase current amplifier

5) Monitoring facilities:

Hardware test upon switching the device ON.

Temperature monitoring

Operating state display

Communication interface for the CMC test device

6) LEDs on the front panel for displaying the operating state

Design and Operation

23

3.1.1 Hardware Test

During power-up, the CMA 56 automatically carries out a hardware test; the device only turns itself ON when this self-test is passed. A new attempt is made every 8 seconds if a malfunction occurs.

3.1.2 Temperature Monitoring

Dependent on the load and the current output, the internal power dissipation results in the heating up of the CMA 56.

When the temperature threshold is reached, the temperature monitoring function automatically switches the device OFF. The LED display at the front panel flashes red/dark (0.5s / 0.5s).

The time until the device is switched OFF due to overheating depends on the following factors:

- the duty factor (ON/OFF time) of the output currents,

- the load,

- the ambient temperature, and

- the temperature within the device due to previous tests.

Typical data:

• At maximum load (3 x 50Arms):

ambient temperature = 25°C

internal device temperature = 25°C

outputs short circuited (max. power loss in CMA 56)

unit switches itself OFF after approx. 4 min.

• For a typical application:

Conditions as above and duty factor 1:2 (e.g. 5s ON / 10s OFF)

unit will never switch OFF.

After the unit switched itself OFF, the CMA 56 will "wait" until the temperature in the device has dropped under a threshold. This threshold is about 5°C below the switch-OFF threshold, i.e. the temperature monitoring function has a hysteresis behavior.


24

4 Connections and Interfaces

4.1 Connectors on the Front Panel

The output sockets are situated on the front panel; three current phases and a neutral. In addition the LED indicators to display the operating states of the amplifiers and the ON/OFF power switch are here.

Figure 3 Front view CMA 56

Connections and Interfaces

25

4.1.1 6mm Connector

The test object is connected to the current phases by a 6mm connector, which is suitable for a maximum output current of 50A.

Figure 4 6mm plug with clamping connection

Ordering Notes for 6mm Connection Plugs

Description KSTN/10F

Order number 15.001 8-4

Manufacturer Multi-Contact

Table 1 Ordering notes for 6mm connection plugs


26

With the aid of a socket outlet adapter a lab cable (with 4mm banana plugs) can be used for I < 20A.

Figure 5 Socket outlet adapter

For measurement and testing this adapter has two 4mm unsprung sockets.

For use as a branching point the adapter is equipped with two 6mm sockets.

Ordering Notes for Socket Outlet Adapter

Description AZ6/6-4F

Order number 14.1005-4

Manufacturer Multi-Contact


27

Multi-Contact Addresses

USA Multi-Contact USA Head Office 5560 Skylane Boulevard Santa Rosa, CA 95403 Tel: +1 / 707 / 575-7575 Fax: +1 / 707 / 575-7573

CH Stammhaus: Multi-Contact AG Basel Stockbrunnenrain 8+12 CH-4123 Allschwil 1 Tel.: +41 / 61 / 302 45 45 Fax: +41 / 61 / 302 45 68

D Multi-Contact Deutschland GmbH Hegenheimerstr. 19 Postfach 1606 D-79551 Weil am Rhein Tel.: +49 / 7621 / 667 - 0 Fax.: +49 / 7621 / 667 - 100

F Multi-Contact France S.A. 4, rue de l'Industrie Z.I. F-68220 Hésingue Tel.: +33 / 89 / 67 65 70 Fax: +33 / 89 / 69 27 96

If you would like to order from OMICRON, see section 8.1 Ordering Information.


28

4.2 Rear View

The mains connection (power supply block) and the connection to the CMC test device (detail b) are located on the rear panel.

Figure 6 Rear view CMA 56

4.2.1 Mains Fuse

Attention: disconnect the mains cable of the device before replacing the mains fuse!

Fuse: T10AH 250V.


29

4.2.2 Interface to the CMC Test Device

Figure 7 Detail b) of rear view CMA 56


30

Sliding Switch

Relevant for use with the CMC for DOS software.

Rotary System I ......... Voltage system in the DOS-Software.

Rotary System II ........ Current system in the DOS-Software.

CM Engine based software (all OMICRON Windows software) ignores the sliding switch.

The position of this switch specifies which of the 3-phase systems of the CMC test device (current or voltage) is used to control the CMA 56. In position II, the signals of the current system of the CMC test device are taken as the signals to be amplified; in position I, the signals from the voltage system are amplified.

Therefore, the sliding-switch is normally set to position II.

Ampl. in

The Lemo jack "Ampl. in" is used to connect the CMA 56 to the CMC test device (or to another source of analog signal to be amplified). Use the cable provided for connection to this socket.

Amplification:

5Vrms corresponds to 50Arms, isolated (Input/Output)

(see also section Technical Data)

Sliding switch setting:

With the sliding switch, you select which rotary system (I or II) is used.

(See also the block diagram in Figure 2)


31

Figure 8 Plug for interface "Ampl. in" (upper 16-pole Lemo socket) (cable connection view)

Socket Signal from CMC test device Function

Pin 1 Gen. out 7 L1 rotary system II (input)



Pin 4 GND_A GNDA Analog Ground

Pin 5 Gen. out 10 L1 rotary system I (input)



Pin 8-16 Reserved reserved

Housing shield connection (ground) shield connection (ground)

Table 2 Assignment


32

Ampl. out

This interface serves for the connection of additional CMA 56, CMA 156 or CMS 156. The signals from "Ampl. in" for the CMA 56 are looped through to "Ampl. out" (electrically connected). Use the cable provided for connection to this socket.

Figure 9 Plug for interface "Ampl. out" (lower, 16-pole Lemo socket) (cable connection view)

Socket Signal from CMC test device Function

Pin 1 Gen. out 7 L1 rotary system II (output)



Pin 4 GND_A GNDA Analog Ground

Pin 5 Gen. out 10 L1 rotary system I (output)



Pin 8-16 reserved reserved

Housing shield connection (ground) shield connection (ground)

Table 3 Assignment


33

Ordering Information for "Ampl. in" and "Ampl. out"

Manufacturer Designation of Plug for "Ampl. Out" and "Ampl. In"

For "Ampl. out": Plug with 2 guide cams and pull relief

FGB.2B.316.CLAD 72Z

For "Ampl in": Plug with 1 guide cam and pull relief

FGG.2B.316.CLAD 72Z

Bend protection spout black GMA.2B.070 DN

Table 4 Manufacturer designation

Manufacturer / Supplier of plug for "Ampl. Out" and "Ampl. In"

USA LEMO USA Inc. 335 Tesconi Circle, Santa Rosa, CA 95406, Tel.: 001/707/578 88 11, Fax: 001/707/578 08 69

D LEMOSA GmbH , Stahlgruberring 7, 8000 München 82 Tel. (089) 42 30 85 FAX (089) 42 71 92

Table 5 Manufacturers / Suppliers

If you want to order from OMICRON, see section Error! Reference source not found. Ordering Information.


34

5 Increasing the Output Power

5.1 Parallel Connection of more CMAs

Several CMA 56s may be connected in parallel with CMA 156s (max. 4

devices; 200A).

Testobject

In parallelconnect.

Ampl. inAmpl. out

ATTENTION:Ensure proper wiring!All slide-switches to position "II" !

CMA 156

CMA 156

CMA 156

CMA 56

"Gen. out 7-12" of the CMC test unitOptional: Gen. out 1-6(CMC 56 s/n < DExxxx: "ext. Ampl.")

Figure 10 Parallel connection of 4 CMA current amplifiers for increasing power

Increasing the Output Power

35

If, for a parallel connection, some CMA's are not used, the amplifiers not in use

• must stay in Power-ON condition or

• must be disconnected at "Ampl. in",

otherwise the input signal gets distorted by the amplifiers in the power-OFF condition.

4 CMA parallel

1 CMA 56

Figure 11 Output power per CMA 56 phase and for parallel connection of 4 CMA amplifiers


36

5.2 Single Phase Operation Series Circuit 1,2 (L-L)

Maximum output voltage: 20Vrms

Maximum power: 280VA at 15A

Current range: 1 0 … 50Arms

If currents 1 and 2 of a CMA 56 are operated in phase opposition (180°), the output power can be doubled.

In order to maintain a valid overload display in this case, the outputs must be connected with low resistance.

1'

1’

N'

N’

1 2 3 N

R

R

V1

V2

V’

R=100E/5W (recommended)

1 2N

*

Figure 12 Single phase operation; series circuit (L, L)

See also the power curve in Figure 16.

* The jumper is only used for suppressing the overload message of phase 3.

Increasing the Output Power

37

5.3 Single Phase Operation Parallel Connection 1+2+3

Maximum output voltage: 10Vrms

Maximum power: 420VA at 45A

Current range: 1 0 … 150Arms

The currents 1, 2 and 3 will be connected in parallel and brought together at the load (burden).

All current channels must be controlled in phase so that the currents will add up.

1'

1'

N'

N'

1 2 3 N

1' N'

1

3

2

N'

N

N

N

I1

I2

I3

I’

Figure 13 Single phase operation; parallel connection 1+2+3

See also the power curve in Figure 16.


38

6 Status Messages

6.1 OVERLOAD

The status display consisting of three LEDs is used to display the operating states of the amplifier.

Via different color- and flash-combinations the individual operating states can be displayed.

LED Indicators Meaning

Green Normal operation; no overload, output not clipped

Red Overload condition; the relevant phase is open circuited or is connected to a too high burden. If the output is open, even without any input signal, an overload indication might result due to the offset current.

Red/dark flashing (0.5s/0.5s)

Temperature overload; the device has turned OFF due to overheating - and will turn itself back ON after the temperature has dropped below a threshold.

Red/dark flashing (1s/1s)

Overcurrent at one of the outputs, caused by a too high input signal; approx. from 55 Arms output switching ON is attempted every 8 sec.

Red/green flashing (0.5s/0.5s)

Hardware fault in the device; switching ON is attempted every 8 sec.

Dark Amplifier is turned OFF

Table 6 LED messages displayed on the front panel of the CMA 56

Technical Data

39

7 Technical Data

Guaranteed values are valid over 1 year from the date of factory calibration, at 23°C ± 5°C over a frequency range DC ... 100 Hz at nominal value and after a warm-up time greater than 25 min.

7.1 Mains Supply

Mains Supply

Connector Plug after IEC320

Voltage, 1-phase Nominal voltage Permissible range

110 ... 240VAC 99 ... 264VAC

Mains fuse T10AH 250V

Power consumption < 1000VA

Frequency

Nominal frequency 50 / 60Hz

Permissible range 45 ... 65Hz

Table 7 Power supply details


40

7.2 Outputs Current 1, 2, 3

3 Current Outputs1

Output currents

3-phase AC 3 0 ... 50A

1-phase AC (1+2+3)2 1 0 ... 150A

1-phase DC 1 0 ... 50A

Output power

3-phase AC 3 140VA at 15A; see page 42

1-phase AC (L-L)3 1 280VA at 15A; see page 37 and p. 42

1-phase AC (1+2+3)2 1 420W at 45A

1-phase DC (L-N) 1 280W at 21A

Accuracy4 typ. error < 0.03% guar. error < 0.1%

Harmonic distortion5 typ. < 0.1% guaranteed < 0.3%

Bandwidth (-3dB) > 8kHz

Phase lag at 50Hz / 60Hz

1.07° / 1.28° (output lagging) (autom. corrected by the CMC test device)

DC offset current typ. < 10mADC guaranteed < 30mADC

Short-circuit protection Open-circuit protection

Short-circuit proof against N. Open outputs (idling) allowed.

Table 8 Current Outputs

3 Current Outputs

Frequency range Sine signals Transient signals

10 ... 1000Hz DC ... 3.1kHz

Output current resolution 2mA

Frequency resolution 5 µHz

Frequency accuracy/drift 0.5ppm/1ppm

Phase range -360° ... + 360°

Phase resolution 0.001°

Phase error6 typ. 0.02° guaranteed < 0.1°

Table 9 Current outputs, specifications valid only if the CMA 56 is controlled by a CMC test device

1 Information for three phase system valid under symmetrical conditions (0°, 120°, 240°)

2 Parallel connection of all three phases

3 Single phase model: 2 currents in series.

4 Percentage refers to nominal current (50A).

5 Values at nominal current (50A), 50/60 Hz and 20 kHz measuring band width.

6 Valid for sine signals with 50/60Hz.

Technical Data

41

Figure 14 Typical output power of the CMA 56 per phase (L-N) 1

Figure 15 Output power curve for single phase operation

1 The given output power is valid for the output plugs, the maximum power at the load (burden) is

reduced by the power loss of the connection cables.


42

Figure 16 Output power curve at 50/60Hz for single phase operation with parallel connection (1+2+3)

Methods for increasing the output power are found in Chapter 5 "Increasing the Output Power".

7.3 Inputs "Ampl. in"

3 analog inputs

Input resistance > 40k

Input voltage range 0 ... 5V

Amplification 10A / 1V (1V at input 10A at output)

max. permissible input voltage 15Vpeak

Isolation input output SELV (SaveExtraLowVoltage)

Table 10 Inputs

Technical Data

43

7.4 Ambient Conditions

7.4.1 Climate

Climate

Temperature Operation

Storage and transport

32 ... 122°F (0 ... +50°C) -13 ... 158°F (-25 ... +70°C)

Relative humidity 5 … 95% relative humidity; noncondensing

Table 11 Climate

7.4.2 Shock and Vibration

Dynamics

Vibration Tested according to IEC68-2-6 (operating mode) frequency range 10..150Hz; acceleration 2g continuous (20m/s

2);

10 sweeps, each axis

Shock Tested according to IEC68-2-27 (operating mode) 15g/11ms, half-sine, each axis

Table 12 Shock and Vibration

7.4.3 Electromagnetic Compatibility (EMC)

EMC

CE Conformity The product complies to the normative document about electromagnetic compatibility for standardization of the laws of the member states of the council of the European Union (EMC standard 89/336/EWG).

Emission International Europe

FCC Subpart B of Part 15 Class A EN 55011/3.1991/Group1/Class A

Susceptibility International Europe

IEC 801-2/3/4 EN 50082-2:1992

Table 13 Electromagnetic compatibility


44

7.5 Safety

Safety Standards and Certificates Complied with

European standards EN 61010-1:1993

International standards IEC 1010-1 UL 3111-1 CAN/CSA-C22.2 No 1010.1-92

Certificates

UL, CUL E 164031

Table 14 Safety standards and certificates complied with

7.6 Mechanical Data

Mechanical Data

Weight 32.6 lbs (14.90 kg)

Dimensions (W x H x D; without handle)

17.7" 5.7" 15.4" (450, 145, 390 mm)

Table 15 Mechanical data

Appendix

45

8 Appendix

8.1 Ordering Information

In this section you will find ordering information for accessories of the CMA 56.

To identify the cables and plugs more easily they are represented graphically in the following diagram:


46

CMC 156

Amplifier (CMA, CMS)

Ampl. in

ext. Interf.

Ampl. out

Gen. out. 7-12

Ampl. in

Connection cable CMC 156 amplifier

6mm connector

Branching plug

Plug for socket"Ampl. in"

Connection cable CMC 156 amplifier

Plug for socket"Ampl. out"

CMA 56

Figure 17 Connection cables and plugs

Appendix

47

Ordering Specification Order Number

Plugs

Plug for 16-pole Lemo socket "Ampl. in" VEHS0001

Plug for 16-pole Lemo socket "Ampl. out" VEHS0002

6mm connector, black VEHS0004

branching plug, black VEHS0005

Plug for Measuring Combination Socket VEHS0104

Cable

Connection cable for CMC 156 amplifier VEHK0003

Exif Board option for CMC 56 VEHB0003

Carrying bag CMA/CMS VEHP0010

Transport case for CMA/CMS VEHP0011

Additional Instruction Manuals for CMA 56 VESD0010

Table 16 Ordering Information


48

8.2 Manufacturer Contact Information

OMICRON electronics GmbH Oberes Ried 1 6833 Klaus Austria

Phone: Fax: E-Mail: Website:

+43 5523 507-0 +43 5523 507-999

[email protected] http://www.omicron.at

mailto:[email protected]

Index

49

9 Index

A

Accessories

Ordering Information .............................................. 45

Air flow ....................................................................... 10

Ambient conditions ...................................................... 43

Ampl. in ....................................................................... 30

Plug assignment ....................................................... 31

Ampl. In ....................................................................... 42

Ampl. Out .................................................................... 32

Amplifier

Configuration .......................................................... 14

Assignment

Ampl. in................................................................... 31

Interface to external amplifier ................................. 32

Automatic switch off ............................................. 20, 23

B

Blink combinations ...................................................... 38

Block diagram .............................................................. 21

Wiring up ................................................................ 15

C

Cable

Length and cross section ........................................... 4


CAN/CSA-C22.2 No 1010.1-92 .................................. 44

Changing the mains fuse ................................................ 5

Circuit diagram CMA 56 ............................................. 21

Climate ........................................................................ 43

CMC for DOS Software version ............................ 10, 12

Color combinations of the LEDs ................................. 38

Communication with CMC .......................................... 20

Configuration

of the CMA 56 as external amplifier ....................... 14

Connection ................................................................... 24

of a second CMA 56 ................................................ 32

of the test objects ..................................................... 15

Principle .................................................................. 15

Connection Cable


Cross section

of the test cable ......................................................... 4

Current amplifier

Configuration ...........................................................14

Current too high ............................................................20

D

Delivery schedule .......................................................... 9

Design of the system .....................................................12

Device test ....................................................................20

Dimensions ...................................................................44

E

Electromagnetic Compatibility .....................................43

Electronic switch .................................................... 22, 30

EMC .............................................................................43

EN 61010-1/1993 .........................................................44

Equipment grounding conductor .............................. 4, 10

Error messages ..............................................................38

European standards .......................................................44

External Amplifier

Plug Assignment ......................................................32

F

Frequency .....................................................................39

Front view .....................................................................24

Fuse .......................................................................... 5, 28

G

Gen. out 7-12

Assignment ..............................................................32

Ground leakage wire .....................................................10

Grounding conductor ................................................ 4, 10

Guaranteed values ........................................................39

H

Hardware

Fault .........................................................................38


50

Test .......................................................................... 23

Heating of the hardware ............................................... 23

I

IEC 1010-1 .................................................................. 44

IEC68-2-27 .................................................................. 43

IEC68-2-6 .................................................................... 43

Important instructions .............................................. 10

Inputs and Outputs

Ampl in ............................................................. 30, 42

Ampl. out ................................................................. 32

Isolation of .............................................................. 22

Interconnection

Block diagram ......................................................... 15

of components ......................................................... 12

Interface ....................................................................... 24

Assignment of Ampl. in .......................................... 31

International standards ................................................. 44

Isolation ....................................................................... 22

Input output ........................................................ 42

Isolation amplifier .................................................. 20, 22

L

LED indicators ............................................................. 20

Possible operating states .......................................... 38

Lemo plug

Assignment of plug to Ampl. in .............................. 31

Length

of the test cable .......................................................... 4

Load too high ............................................................... 20

M

Mains

Connection .............................................................. 28

Supply ..................................................................... 39

Mains fuse...................................................................... 5

Maintenance ................................................................. 3

Manufacturers

of plugs .................................................................... 33

OMICRON .............................................................. 48

Mechanical data ........................................................... 44

Messages .................................................................. 38

Modules

Description .............................................................. 20

Monitoring facilities .................................................... 22

Monitoring the device .................................................. 20

N

Nominal frequency .......................................................39

O

OMICRON

Contact information .................................................48

Opening the device....................................................... 5

Ordering information

Plug Manufacturers ..................................................26

Ordering Information ....................................................45

Output current too high .................................................20

Output power ................................................................41

Outputs .........................................................................40

Overcurrent ............................................................. 20, 38

Overheating ............................................................ 20, 38

Overload .......................................................................38

Display .....................................................................38

P

Plugs

Manufacturers and suppliers ....................................33

Ordering information ...............................................26

Ordering Information ...............................................45

Power

Consumption ............................................................39

Dissipation ...............................................................23

Supply ......................................................................39

Principle Circuit Diagram CMA 56 ..............................21

Problems

Contact information .................................................48

R

Rear view CMA 56 .......................................................28

Rotary system switch .............................................. 22, 30

S

Safety ............................................................................44

Shock and Vibration .....................................................43

Signal processing ..........................................................20

Sliding switch ...............................................................30

Position of .................................................... 11, 22, 30

Software version ..................................................... 10, 12

Index

51

Standards ..................................................................... 44

Starting the system ................................................ 3, 12

Status messages ........................................................... 38

Suppliers of plugs ........................................................ 33

Supply .......................................................................... 39

Switch .................................................................... 22, 30

Switching off the device .............................................. 20

System

Components ............................................................... 9

Design ..................................................................... 12

Start ......................................................................... 12

T

Technical data .............................................................. 39

Telling circuit .............................................................. 20

Temperature

Error ........................................................................ 38

Monitoring ............................................................... 23

Threshold ................................................................. 23

Test objects connection ................................................ 15

Testing the device ........................................................ 20

Threshold ..................................................................... 23

U

UL test ..........................................................................44

Use of the CMA 56 .......................................................10

V

Ventilation slots ............................................................10

Version of CMC for DOS Software........................ 10, 12

Vibration and Shock .....................................................43

View

Back of CMA 56 ......................................................28

Front of CMA 56 ......................................................24

W

Warm up time ...............................................................39

Warranty ...................................................................... 5

Wiring up

Block diagram ..........................................................15

the System ................................................................12

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