857-RAA/857-RAD RTD Scanner User Manual · 857-RAD Scanner Figure 5 - Dual Glass Fiber Connection...

857-RAA/857-RAD RTD ScannerCatalog Numbers 857-RAA, 857-RAD

User ManualOriginal Instructions

Important User Information

Read this document and the documents listed in the additional resources section about installation, configuration, and operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.

Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required to be carried out by suitably trained personnel in accordance with applicable code of practice.

If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

Labels may also be on or inside the equipment to provide specific precautions.

WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.

IMPORTANT Identifies information that is critical for successful application and understanding of the product.

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.

ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

Table of Contents

PrefaceSummary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Chapter 1Layout Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Catalog Number Explanation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Chapter 2Application 857-RAA Scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

857-RAD Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Communication Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

857-RAD DIP-Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Chapter 3Wiring Configurations RTD Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Recommended RTD Cable type . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Current Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Recommended RTD Cable type . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Thermistor (PTC) Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Chapter 4Configure the Base 857 Relay Connect a Bulletin 857 Relay to PC. . . . . . . . . . . . . . . . . . . . . . . . . 17

Connect to the 857-RAA RTD Scanner . . . . . . . . . . . . . . . . . . . . . . . . 18Protocol Configuration to Connect the 857-RAA to the 857 . 18External I/O configuration for 857-RAA . . . . . . . . . . . . . . . . . . . . 19RTD Inputs Quick Setup for 857-RAA . . . . . . . . . . . . . . . . . . . . . 20

Connect to the 857-RAD RTD Scanner . . . . . . . . . . . . . . . . . . . . . . . . 21Protocol Configuration for 857-RAD RTD Scanner . . . . . . . . . 21External I/O configuration for 857-RAD . . . . . . . . . . . . . . . . . . . 22RTD Inputs Quick Setup for 857-RAD . . . . . . . . . . . . . . . . . . . . . 23External Analog Inputs for 857-RAD . . . . . . . . . . . . . . . . . . . . . . . 24Analog Input Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

External Analog Outputs for 857-RAD Scanner . . . . . . . . . . . . . . . . . 26Analog Output Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Chapter 5Specifications Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 3

Table of Contents

Appendix AConfigure the 857-RAD Analog Outputs

Example #1 – mA Output Scaling for IL. . . . . . . . . . . . . . . . . . . . . 35Example #2 – mA Output Scaling for ULine. . . . . . . . . . . . . . . . . 36Example #3 – mA Output Scaling for Bidirectional Power . . . . 37

Appendix BConstruction and Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

4 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Preface

This manual shows you how to install, wire, and program the Bulletin 857 relay, using the SetPointPS programming and configuration software tool, and how to configure either RTD scanner.

Summary of Changes This publication contains new and updated information as indicated in the following table.

Additional Resources These documents contain additional information concerning related products from Rockwell Automation.

You can view or download publications at http://www.rockwellautomation.com/global/literature-library/overview.page. To order paper copies of technical documentation, contact your local Allen-Bradley distributor or Rockwell Automation sales representative.

Topic Page

Added small section on terminal switches 12

Added footnote about RTD channels 20

Replaced Appendix A on Analog Outputs 35

Resource Description

857 Protection System for Feeder and Motor Protection, Series A, publication 857-UM001

Provides information on parameters, installation, dimensions, troubleshooting, control functions, and specifications

SetPointPS Configuration Software Programming Manual, publication 857-PM001

Provides information on configuring, setting up, troubleshooting, and using the SetPointPS communication software

857 Protection System for Feeder and Motor Protection Quick Start, publication 857-QS001

Provides information on mounting, wiring, and installation of the 857 relay

857 Protection System Specification Guide, publication 857-SR001

Provides specifications on protective features, measuring and monitoring, arc flash protection, and cold load pickup monitoring

857-VPA3CG PROFIBUS DP Option Module, publication 857-UM003

Provides information on the PROFIBUS option modules, including installation, commissioning, dimensions, and specifications

Product Certifications website, http://www.rockwellautomation.com/global/certification/overview.page

Provides declarations of conformity, certificates, and other certification details.


http://literature.rockwellautomation.com/idc/groups/literature/documents/um/857-um001_-en-p.pdf

http://literature.rockwellautomation.com/idc/groups/literature/documents/pm/857-pm001_-en-p.pdf

http://literature.rockwellautomation.com/idc/groups/literature/documents/qs/857-qs001_-en-p.pdf

http://literature.rockwellautomation.com/idc/groups/literature/documents/sr/857-sr001_-en-p.pdf


http://www.rockwellautomation.com/global/certification/overview.page

http://www.rockwellautomation.com/global/certification/overview.page

http://www.rockwellautomation.com/global/literature-library/overview.page

http://www.rockwellautomation.com/global/literature-library/overview.page

Preface

Notes:


Chapter 1

Layout

Overview The Allen-Bradley™ Bulletin 857-RAA and 857-RAD are both 12 channel RTD scanners. The 857-RAD enhanced scanner also provides support for a PTC (thermistor) input along with four programmable 0…25 mA current input channels and four programmable 0…25 mA current output channels that can be programmed for any analog scale (for example, 0…1mA, 4…20mA, 1…5mA, and so on). Both the 857-RAA and 857-RAD are connected to the Bulletin 857 relay via ST-type glass fiber optic cables; the 857-RAA uses one fiber optic cable (only TX) while the 857-RAD uses a dual fiber optic cable configuration (TX and RX).

The RTD scanners can also be mounted remotely up to 2000 m from the base 857 relay.

Catalog Number Explanation

1 2 3

857 R A Aa b c

a

Scanner Connectivity

R Connection to base 857 relay

bBasic Scanner Capabilities

A 12 Channel RTD Scanner

cSupply Voltage, Communications Method, and Capabilities

A 48…264V AC/DC, 50/60Hz Input power: single-glass, fiber-optic communication

B 48…264V AC/DC, 50/60Hz Input power: RS-485 communication

C 24V DC input power. Comes with 4+4 configurable mA outputs/inputs, dual-glass, fiber-optic communications

D48…264V AC/DC, 50/60 Hz input power. Comes with 4+4 configurable mA outputs/inputs, dual-glass, fiber-optic communications


Chapter 1 Layout

Figure 1 - 857-RAA and 857-RAD Configuration

Figure 2 - 857-RAA RTD Scanner Layout

1. Grounded metal enclosure

2. Glass fiber Tx communication

3. Not used on this model

4. RTD inputs (12 channels, 3-wire connection + shield / channel)

5. Power connector and earthing connection

6. DIN rail mounting

Fiber Optic Connection Fiber Optic Connections

857-RAD857-RAA

12 RTD Channels 12 RTD Channels

4 Configurable Analog Inputs

4 Configurable Analog Outputs

1 PTC Input


Layout Chapter 1

Figure 3 - 857-RAD RTD Scanner with mA inputs/outputs

1. Grounded metal enclosure

2. Glass Fiber Rx communication

3. Glass Fiber Tx communication



6. Address DIP switch

7. RTD inputs (12 channels, 3-wire connection + shield / channel)

8. Power connector and earthing connection

9. PTC input (2-wire connection)

10. Four mA inputs / four mA outputs (2-wire connection /channel)

11. DIN Rail mounting


Chapter 1 Layout

Notes:


Chapter 2

Application

857-RAA Scanner Figure 4 - Single Glass Fiber Connection to the Bulletin 857-RAA Scanner

857-RAD Scanner Figure 5 - Dual Glass Fiber Connection to the 857-RAD Scanner and the 857 Relay

Fiber Optic Interface Modulemounted to the Option Module

857-RAA Fiber Tx

Multimode Fiber Optic Cable• Diameter: 62.5/125 μm• Connector Type: ST

857-RAA on Wall or DIN Rail

857-RAD Fiber Tx

Multimode Fiber Optic Cable• Diameter: 62.5/125 μm• Connector Type: ST

857-RAD on Wall or DIN Rail

857-RAD Fiber Tx


Chapter 2 Application

Communication Settings 857-RAD DIP-Switches

The DIP switches allow you to configure communication settings that are required by the application.

Figure 6 - DIP Switches

These are the termination switches related only to the RS-485 interface. Both switches must be ON or OFF at the same time. They are not used with fiber optic connections.

The portion of the address switch selects the slave address for the 857-RAD scanner. The slave address must match the setting in the base 857 relay.

The switch position is ON when the switch is turned DOWNWARDS.

Table 1 - LE:1. Optical Fiber Communication Setup

Position Function

ON Light is on when there is data being sent.

OFF(1)

(1) Default position.

Light is off when there is no data being sent.

Table 2 - LE:2. Optical Fiber Multi-slave Chain/Ring Topology Setup

Position Function

ON 857-RAD echoes the data received to the next device in the chain.

OFF(1)

(1) Default position.

857-RAD does not echo to the next device in the chain.

Table 3 - Address Switch Block

Position Function

ON Selected single address bit is set to 1.

OFF Selected single address bit is set to 0.


Application Chapter 2

The address switch block is made up of 8 single switches. Their combination provides the user with an address block of 256 addresses (0…255). However, it is very important to note that the Modbus protocol that is used between the RTD scanner and the base 857 relay restricts the use of addresses 0 and others larger than 247 (decimal base).

For example, the address switch represents the RTDs address in its binary notation.

5 (decimal) = 00000101 (binary)

(switch setting 1…8) = 10100000

Address Switch

OFF

ON

1 2 3 4 5 6 7 8


Chapter 2 Application

Notes:


Chapter 3

Wiring Configurations

RTD Connections RTD connections are the same for all versions of the RTD Scanners. Figure 7 shows the proper way to connect RTDs.

Figure 7 - Connections of RTDs, Typical

Recommended RTD Cable type

Shielded non-paired control and instrumentation cable.


Chapter 3 Wiring Configurations

Current Inputs/Outputs

Figure 8 - 857-RAD mA Input and mA Output Connections

The RTD channel number for each terminal connection can be confirmed by viewing it from the top of the RTD scanner (see Figure 3).

Recommended RTD Cable type

Shielded non-paired control and instrumentation cable.

Thermistor (PTC) Connections

Figure 9 - 857-RAD PTC Connection Location

mA Inputs mA Outputs


Chapter 4

Configure the Base 857 Relay

This section describes the configurations required to correctly set up a Bulletin 857 relay and one of the two optional RTD scanner modules available. There are different hardware and setup configuration requirements depending on the model of the RTD scanner used.

Connect a Bulletin 857 Relay to PC

Connect cable 857-VX003-3 to the front panel of the relay (Figure 7).

Figure 10 - Connecting Cable 857-VX003-3 to the Front Port on the 857 Relay

For more information about communication between Bulletin 857 relay and a PC, refer to publication 857-UM001 and publication 857-PM001.

This manual is divided into two sections to setup the 857-RAA or 857-RAD.

See Connect to the 857-RAA RTD Scanner on page 18 or Connect to the 857-RAD RTD Scanner on page 21.

IMPORTANT Many newer PCs do not have a serial port. A suitable USB to serial port converter should be used. Rockwell Automation recommends the use of a Bulletin 9300-USBS USB to Serial Port Adapter Kit.




Chapter 4 Configure the Base 857 Relay

Connect to the 857-RAA RTD Scanner

The 857-RAA RTD scanner module is connected to the Bulletin 857 relay using one fiber optic cable interface module (VCM RTD). there are no hardware settings required on the 857-RAA RTD scanner module.

Protocol Configuration to Connect the 857-RAA to the 857

Follow these steps to connect the 857-RAA to the base 857 relay.

1. Select Protocol Configuration in SetPointPS.

2. In the Extension Port protocol section, confirm External I/O is selected.

3. If it is not, click the pulldown menu and select External I/O.

a

IMPORTANT The unit Bulletin 857 relay must be equipped with a suitable optical interface module (VCM RTD) to receive data from the 857-RAA scanner. One of the communication ports must include an interface called VCM RTD (Figure 5-3). See publication 857-UM001 for catalog number information.

IMPORTANT If a parameter is changed, it will be highlighted in red. This indicates that a change has been made in the setup tool and this data must be uploaded into the base relay. Once saved to the relay, the relay may request a reboot (restart).



Configure the Base 857 Relay Chapter 4

External I/O configuration for 857-RAA

Follow these steps to verify the correct external input device and external input protocol are selected.

1. Under Protocol Configuration, select External I/O Configuration.

2. Click External I/O Device Type.

3. Click 857-RAA.

4. Click External I/O Protocol.

5. Click RTDinput.

The External I/O Bit Rate should be set to 9600 bits per second (bps) and the Data Parity is always Even.

The 857-RAA input settings are shown in Table 4.

IMPORTANT If a parameter is changed, it will be highlighted in red. This indicates that a change has been made and this data must be uploaded into the base relay. Once saved to the relay, the relay may request a reboot (restart) depending on the setting changed.

Table 4 - External I/O Configuration Settings

External I/O Device Type 857-RAA

External I/O Protocol(1)

(1) After changing this parameter, you must restart the 857 base relay using SetPointPS or by cycling power the 857 base relay.

RTD Input

External I/O bit rate(1) 9600

Parity(1) Even



RTD Inputs Quick Setup for 857-RAA

In the External I/O Configuration of SetPointPS, you will find RTD Inputs- Quick Setup. This interface makes individual RTD channel setup quick and simple.

Once all the settings for the 857-RAA have been completed, all these new setting values must be uploaded into the relay by using the depressing the Write All Settings to the Device icon within the SetPointPS software interface. See publication 857-PM001. The alarm (start) and trip status information for each channel enabled must be reviewed and mapped to an output device through the Output Matrix in the 857 relay. See publication 857-UM001 for details of the Output Matrix configuration.

Table 5 - RTD Inputs • Quick Setup Parameters(1)

(1) Only the first 12 channels are used for RTD inputs. Channels 13…16 only used with 857-RAD.

Parameter Value(s) To Modify:

AI Enabled On / Off 1. Select the row of the channel you want to modify. 2. Choose the desired selection from the pulldown menu.

RTD Ch Cannot modify N/A

RTD Sensor Type Other..., Pt100, Ni100, Ni120, Cu10

1. Select the row of the channel you want to modify. 2. Choose the desired selection from the pulldown menu.

RTD Sensor Function

Off, WindingG, Bearing G, Ambient, Other...

Alarm Limit >(2)

(2) Units are in Celsius.

User-defined 1. Select the row of the channel you want to modify.2. Enter the desired value on your keyboard. 3. Press Enter.

Trip Limit >>(2) User-defined






Connect to the 857-RAD RTD Scanner

The 857-RAD enhanced RTD scanner communicates to the base relay using a Modbus protocol over dual fiber optic cables. The address of the module must be set with the DIP switches on the side of the device. The available address range is 1…247. See the side and top of the 837-RAD enclosure for switch position (Figure 3). The baud rate is fixed at 9600 bps, with even parity.

Protocol Configuration for 857-RAD RTD Scanner

1. Select Protocol Configuration in SetPointPS.

2. In the Remote port protocol section, confirm ExternalIO is selected.

3. If it is not, click the pulldown menu and select ExternalIO.

IMPORTANT The unit Bulletin 857 relay must be equipped with a dual-channel optical interface module (VCM FIBER) to receive data from the module.



External I/O configuration for 857-RAD

Follow these steps to select the external I/O device type and protocol.

1. Under Protocol Configuration, select External I/O Configuration.

2. Click the External I/O Device Type.

3. Select 857-RAD.

4. Click External I/O Protocol.

5. Select ModBus.



The 857-RAA input settings are shown in Table 6.


Table 6 - External I/O Configuration Settings

External I/O Device Type 857-RAD

External I/O Protocol(1)

(1) After changing this parameter, you must restart the relay using SetPointPS or by cycling power the 857 base relay.

ModBus

External I/O bit rate(1) 9600

Parity(1) Even



RTD Inputs Quick Setup for 857-RAD

In the External I/O Configuration, you will find RTD Inputs-Quick Setup. This interface makes individual RTD channel setup quick and simple.

Once all the settings for the 857-RAD have been completed, all these new setting values must be upload into the relay using the depressing the Write All Settings to the Device icon within the SetPointPS software interface. See publication 857-PM001. The alarm (start) and trip status information for each channel enabled must be reviewed and mapped to an output device through the Output Matrix in the 857 relay. See publication 857-UM001 for details of the Output Matrix configuration.

Table 7 - RTD Inputs • Quick Setup Parameters

Parameter Value(s) To Modify:

AI Enabled On / Off 1. Select the row of the channel you want to modify. 2. Choose the desired selection from the pulldown menu.

RTD Ch Cannot modify N/A

RTD Sensor Type Other..., Pt100, Ni100, Ni120, Cu10

1. Select the row of the channel you want to modify. 2. Choose the desired selection from the pulldown menu.

RTD Sensor Function

Off, WindingG, Bearing G, Ambient, Other...

Alarm Limit >(1)

(1) Units are in Celsius.

User-defined 1. Select the row of the channel you want to modify.2. Enter the desired value on your keyboard. 3. Press Enter.

Trip Limit >>(1) User-defined






External Analog Inputs for 857-RAD

The 857-RAD is equipped with four individual isolated analog inputs. If used, these inputs must be configured within the base relay for proper operations.

Analog Input Settings

Select External Analog Inputs.

In the External Analog Inputs tab, you do not need to adjust the first 12 channels that are associated with the RTD Inputs- if you followed the RTD Inputs Quick Setup for 857-RAD on page 23.

IMPORTANT Some of the parameters are preset by the hardware configuration. Not all fields need to be changed.

Parameter Value Notes

AI Enabled On, Off Enable the analog input channel by clicking on the appropriate location under the AI Enabled area. Turn ON or OFF each individual channel. These will be the last four lines of the table.

AI Slave Address 1…247 The AI Slave Address must match the hardware selection made on the dip switch on the side of the 857-RAD module.

AI Modbus Address 1…9999 Select the units of measure for each channel by clicking on the appropriate location under the AI Unit area. Select mA.The other units listed in the drop list are not presently available.

AI Register Type HoldingR, InputR Modbus RTU register type. Relay sets these according to the selected device type.

AI Signed On, Off AI Signed should be left as OFF. For other uses please contact Rockwell Automation.

AI Offset -32000…32000 AI Offset is subtracted from Modbus value, before running X/Y scaling. This is normally left at 0.

x1, y1, x2, y2 -32768…32768 X1 and X2 are the minimum and maximum Modbus values. Y1 and Y2 are the minimum and maximum scaled values (see Figure 11).



These scaling factors shift the measured value’s decimal point to either left or right so that accuracy of the measurement is decreased or increased. This is done when the relationship between the parameters are in factors of 10. See 857-PM001 for further details regarding scaling.

Figure 11 - X1, X2, Y1, Y2 Scaling

See Table 8 for the valid values for the parameters “AI Enabled”, “AI Unit”, “AI Slave Address”, “AI Modbus Address”, “AI Register Type”, “AI Signed”, “AI Offset” and the X1, X2, Y1 and Y2 ranges setting that can be adjusted within the External Analog Input-Quick Setup field in SetPointPS.

When External I/O-protocol selection is RTDinput, the AI Slave Address, AI Modbus Address, AI Register Type and AI Signed can be left to their default values.

Table 8 - Parameter Values and Description

Parameter Value Explanation

AI Enabled On Particular AI enabled

Off Particular AI disabled

AI Slave Address Settable value (1 – 247) Address of the 857-RAD (address set with DIP switches)

AI Modbus Address Value (1 – 9999) Modbus RTU registers. Relay sets these according to the selected device type.

AI Register Type HoldingR Modbus RTU register type. Relay sets these according to the selected device type.

InputR

AI Signed On Relay sets these according to the selected device type.

Off

AI Offset Settable value (-32000 thru 32000) Used to adjust the measured value throughout the range.

x1, y1, x2, y2 Settable value (-32768 thru 32768) Scaling values. X1 and X2 are the minimum and maximum modbus values. Y1 and Y2 are the minimum and maximum values




External Analog Outputs for 857-RAD Scanner

The 857-RAD scanner is equipped with four individual isolated analog outputs. If used, these outputs must be configured within the base relay for proper operations. Each analog output has a fully configurable output current range. Typical range configurations would be 0…20 mA or 4…20 mA. More dynamic ranges like 0…1 mA, 0…5 mA, or 10…20 mA can be configured freely as long as the boundary values are within the 0…20 mA range.

Table 9 - 857-RAA/RAD External I/O Registers

Modbus Register Properties

RTD Channel 1 resistance 301 Read












mA-input 1(1)

(1) 857-RAD only.

313 Read

mA-input 2(1) 314 Read



PTC-resistance(1) 317 Read

mA-output 1(1) 318 Read / Write






Analog Output Settings

Click External Analog Output in SetPointPS.

In the External Analog Output tab, you will find all of the analog output settings within the quick setup screen. There are 16 possible analog output channels. Only the first four are currently supported.

IMPORTANT Some of the parameters are preset by the hardware configuration. Not all fields need to be changed.

Table 10 - 857-RAD External Analog Outputs Parameter Setup

Parameter Value Explanation Notes

AO enabled ON Analog output enabled These will be the first four lines of the table.

OFF Analog output not enabled

mA output 0…20 Analog output current in mA Depends on the values set for the parameters mA Min, mA Max, Linked Val. Min/Max and Modbus Min/Max parameters.

mA Min User defined. See Table 11 on page 28 for the various measurands that can be linked to any of the four analog outputs.

Minimum output current in mA Depends on the values set for the parameters:Linked Val. Min and Min Modbus.Value set is related to Modbus Min by a ratio of 1:1000.Typical Value: 0 mA

mA Max User defined. See Table 11 on page 28 for the various measurands that can be linked to any of the four analog outputs.

Maximum output current in mA Depends on the values set for the parameters:Linked Val. Max and Max Modbus.Value set is related to Modbus Max by a ratio of 1:1000.Typical value: 20 mA (maximum of 25 mA)

AO Link See Configure the 857-RAD Analog Outputs on page 35

857’s analog input or measurement relationship

This parameter directly linked to the mA output parameters. A selection between 30 different measurements is available.



Linked Val. Min See Configure the 857-RAD Analog Outputs on page 35

AO Link’s user defined Minimum Value

Allows scaling of the mA Output parameter

Linked Val. Max See Configure the 857-RAD Analog Outputs on page 35

AO Link’s user defined maximum value

Allows scaling of the mA Output parameter.

Ao Slave address 1…247 RTD Modbus slave address Value must match the hardware Address ss defined by the switches on the 857-RAD

Ao Modbus address See Configure the 857-RAD Analog Outputs on page 35

1 3182 3193 3204 321

Although there are 16 locations available, only 4 can be assigned (857-RAD). Addresses are by default numbered from 1 to 16. However the address value must be set according to the Modbus registers values, meaning that:Analog Output 1 — Modbus 318

Ao Register type HoldingR Holding register According to the Modbus Protocol a Holding Register is a 16-bit word register which can be read or written.

Modbus Min See Configure the 857-RAD Analog Outputs on page 35

This is the minimum value which is sent to the 857-RAD via Modbus protocol in order to set the minimum value for the mA Min parameter.

Typical values;mA Min = 0 is equal to a Modbus Min = 0The relationship between these two parameters is 1:1000.See Configure the 857-RAD Analog Outputs on page 35.

Modbus Max See Configure the 857-RAD Analog Outputs on page 35

This is the maximum value which is sent to the 857-RAD via Modbus protocol in order to set the maximum value for the mA Max parameter.

Typical values;mA Max = 20 is equal to a Modbus Max = 20000The relationship between these two parameters is 1:1000.See Configure the 857-RAD Analog Outputs on page 35

AO Counter 0 … Error counter for AO It increments itself if either AO Slave Address or Ao Register Address are not set correctly

Table 10 - 857-RAD External Analog Outputs Parameter Setup (Continued)

Parameter Value Explanation Notes

Table 11 - Measurands that can be Assigned to Analog Outputs

Measurement Value Description Extended Description Measurand

P Active power Real power [kW]

Q Reactive power Reactive power flow [kvar]

S Apparent power Root-mean-square (rms) current by the root-mean-square voltage [kVA]

P.F. Power factor Measured power factor -1 to 1

f Frequency Measured frequency [Hz]

cosphi Cosine phi (kW/kVA) - 1 to 1

IL1 Phase current IL1 Phase A current [A]

IL2 Phase current IL2 Phase B current [A]

IL3 Phase current IL3 Phase C current [A]

IL Average current (IL1+IL2+IL3)/3 Motor or feeder average current [A]

U12 Phase-to-phase voltage U12 Line-to-line voltage [V]

U23 Phase-to-phase voltage U23 Line-to-line voltage [V]

31 Phase-to-phase voltage U31 Line-to-line voltage [V]

UL Average for the three phase voltages Line to Line Average Voltage (LL) [V]

UL1 Phase-to-earth voltage UL1 Phase-to-ground voltage [V]



UPhase Average Voltage (UL1+UL2+UL3) Line to Neutral Average Voltage (LN) [V]

IFault Latest overcurrent fault level Pu value of current [pu]



Troubleshooting If an RTD sensor is disconnected (open circuited) a value of -200 ºC is returned for the respective sensor channel. As well, a status indicator called ‘Ext. Al disconnected’ will be enabled within the Output Matrix of the base 857 relay.

If an RTD sensor is short circuited, a value of -250 ºC is returned for the respective sensor channel. A status indicator called ‘Ext. Al short circuit’ will be enabled within the Output Matrix of the base 857 relay.

If power is lost to the 857-RAA or if communications between the base relay and the 857-RAA are lost:

• Each sensor channel displays a value of -250 ºC. • There are two status indicators within the Output Matrix to provide

feedback on the communication link status to the RTD scanner. ‘REMOTE Comm.’ which is activated when the communication link to the 857-RAA is active or ‘REMOTE Comm Inactive’.

• Timeout counter increases in the Protocol menu(1)

If power is lost to the 857-RAD or if communications between the base relay and the 857-RAD is lost, when using Modbus RTU-protocol then:

• Each sensor channel value freezes• AI error counter increases in the External analog inputs menu• There are two status indicators within the Output Matrix to provide

feedback on the communication link status to the RTD scanner. ‘EXTENSION Comm.’ which is activated when the communication link to the 857-RAD is active or ‘EXTENSION Comm Inactive’

• Timeout counter increases in the Protocol menu(1)

XFault Fault reactance ohms [Ω]

SagMin Minimum voltage sag Pu value of voltage [pu]

Sagmax Maximum voltage sag Pu value of voltage [pu]

U0 zero sequence voltage Percentage of zero sequence setting [%]

AL1 Analog Input #1 Scalable reading of AI1 (from 0…20mA) [mA]




Io1 Ground fault current channel 1 Ground Fault current #1 [A]

Io2 Ground fault current channel 2 Ground Fault current #2 [A]

Iocalc Phasor sum IL1 + IL2 + IL3 Phasor sum IL1 + IL2 + IL3 [A]

Table 11 - Measurands that can be Assigned to Analog Outputs

(1) If the application uses Remote or Extension-communication port, an alarm can be generated using relay logic, for example, inverted Remote.comm – signal can be used to drive an LED indicator on the front of the relay.



Notes:


Chapter 5

Specifications

Specifications Table 12 - RTD Inputs

Description Value

RTD inputs 12

RTD types Pt100, Ni100, Ni120, Cu10

Measuring range (Ω) 1…400 (-50…+200 °C/-58…392 °F)

Measuring accuracy (Ω) ±0.3 (±1°C/34°F)

Measuring resolution (Ω) 0.10

Measuring time (s) 1 for all channels (mean value 1)

RTD open-circuit detection (Ω) >450

RTD short-circuit detection (Ω) <1

RTD sensor function Off, Winding, Bearing, Ambient, Other

Table 13 - Analog Inputs(1)

(1) 857-RAD only.

Description Value

mA inputs 4

Input range (mA) 0…25

Input accuracy (%) ±1

Input resolution (μA) 6 (12-bit)

Input impedance (Ω) 100

Table 14 - Analog Outputs(1)

(1) 857-RAD only.

Description Value

mA outputs 4

Output range (mA) 0…25

Output accuracy (%) ±1

Output resolution (μA) 6 (12-bit)

Galvanic isolation (V) 1000

Maximum load/output (Ω) 750


Chapter 5 Specifications

Table 15 - PTC Input(1)

(1) 857-RAD only.

Description Value

PTC inputs 1

Measuring accuracy (%) ±10 (<10 kΩ)

Maximum cold resistance of PTC sensor (kΩ) 650

Table 16 - RTD Measuring Circuitry

Description Value

Cable type Shielded non-paired control and instrumentation cable (for example, Belden 8771)

RTD measuring current (mA) Approx 1

Maximum wire resistance (Ω) 50/lead (corresponds to 2000m at 0.75 mm2 copper wire)

Terminal block maximum wire dimensions Phoenix MSTB or equivalent, 2.5 mm2 (13-14 AWG)

Table 17 - Supply Voltage

Description Value

Rated voltage See Catalog Number Explanation on page 7.

Power consumption (W) <1 (normal conditions)

Terminal block maximum wire dimensions Phoenix MSTB or equivalent, 2.5 mm2 (13-14 AWG)

Power status indicator Normally on. Contact Rockwell Automation if it blinks.

Table 18 - Glass Fiber Connection

Description Value

Fiber type Multi-mode fiber optic cableØ 62.5 /125 μm

Connector type ST

Maximum fiber length (m) 2000

Number of fiber cables 857-RAA: 1857-RAD: 2

Table 19 - Environmental and Enclosure Specifications

Description Value

Operating temperature 0…55 °C (32…131 °F)

Protection IEC 60529: IP20NEMA: NEMA 1

Dimensions 262.0 x 97.8 x 66.7 mm (10.3 x 3.9 x 2.6 in.)

Material 1 mm steel plate

Weight (approx) 1 kg (2 lb)

Approvals CE, cULus


Specifications Chapter 5

Table 20 - Disturbance and Voltage Tests

Test Standard and Test Class Test Value

Emission (IEC / EN 61000-6-4) Conducted (EN 55011 / CISPR 11) 0.15…30 MHz

Emitted (EN 55011 / CISPR 11) 30…1000 MHz

Immunity (IEC / EN 61000-6-2) Static discharge (ESD) EN 61000-4-2, class III6 kV contact discharge8 kV air discharge

Fast transients (EFT) EN 61000-4-4, class III2 kV, 5/50 ns

Surge EN 61000-4-5, class III1 kV differential mode2 kV common mode

Conducted RF IEC/EN 61000-4-6, Class III0.15…80 MHz, 10V/m

Radiated RF IEC/EN 61000-4-3, Class III80…2000 MHz, 10V /m

Power frequency magnetic field IEC/EN 61000-4-8100 A/m, 50/60Hz

Pulse magnetic field IEC/EN 61000-4-91000A / m, 1.2/50 μs

Voltage dips 7 interruptions IEC/EN 61000-4-11

Voltage tests (IEC 61810-1) Dielectric voltage 2 kV/min

Impulse voltage 5 kV, 1.2 / 50 μs


Chapter 5 Specifications

Notes:


Appendix A

Configure the 857-RAD Analog Outputs

From the External Analog Outputs set up screen in SetPointPS, you can scale each of the four Analog Outputs independently. Below are shown several variations for the configuration of the Analog Output (mA) scaling. The output scaling is fully scalable.

Figure 12 - External Analog Outputs

Example #1 – mA Output Scaling for IL• AO Link measurand = IL• Minimum Analog Output value = 0 mA• Maximum Analog Output value = 20 mA• Linked minimum value = 0 A• Linked maximum value= 300 A• Modbus minimum value = 0

(Minimum Analog Output value x 1000)• Modbus maximum value= 20000

(Maximum Analog Output value x 1000)

A B C D

A Scaled analog output minimums & maximums. These determine the output range in mA.

B Linked Analog Output measurand. This defines which measurand is selected for the scaled value.

C Linked minimum and maximum value. These determine the range of the linked measurand.

D Modbus minimum and maximum value. The Modbus scaling for the analog output (factored by 1000).


Appendix A Configure the 857-RAD Analog Outputs

Figure 13 - mA Output Scaling for IL

Example #2 – mA Output Scaling for ULine

• AO Link measurand = ULine• Minimum Analog Output value = 4 mA• Maximum Analog Output value = 20 mA• Linked minimum value = 0V• Linked maximum value = 15,000V• Modbus minimum value = 4000

(Minimum Analog Output value x 1000)• Modbus maximum value= 20000


Figure 14 - mA Output Scaling for ULine

AnalogOutput

AnalogOutput


Configure the 857-RAD Analog Outputs Appendix A

Example #3 – mA Output Scaling for Bidirectional Power• Minimum Analog Output value = 4 mA• Maximum Analog Output value = 20 mA• Linked minimum value = -2000 kVAR• Linked maximum value = 6000 kVAR• Modbus minimum value = 4000

(Minimum Analog Output value x 1000)• Modbus maximum value= 20,000


Figure 15 - mA Output Scaling for Bidirectional Power

AnalogOutput


Appendix A Configure the 857-RAD Analog Outputs

Notes:


Appendix B

Construction and Mounting

Figure 16 - DIN-rail Mounting


Appendix B Construction and Mounting

Figure 17 - Wall Mounting


Publication 857-UM002C-EN-P - February 2018 Supersedes Publication 857-UM002B-EN-P - February 2018 Copyright © 2018 Rockwell Automation, Inc. All rights reserved. Printed in Canada.

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857-RAA/857-RAD RTD Scanner User Manual · 857-RAD Scanner Figure 5 - Dual Glass Fiber Connection...

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