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Remotely monitor and control multiple transfer switches
Eaton’s HMi Remote Annunciator Controller (RAC) series provides users with the ability to remotely monitor and control multiple transfer switches from one intuitive, touch screen user interface.
Remote management, enhanced safety
Tightening arc flash regulations and requirements for personal protective equipment are driving more and more end users toward the use of remote monitoring and control devices. Eaton’s HMi Remote Annunciator Controller offers a simple and cost-effective means of providing transfer switch monitoring and control.
Designed to meet today’s most common specifications, including the City of Chicago Electrical Code, the HMi RAC communicates with Eaton’s automatic transfer switch controller via serial ModbusT or Ethernet (with Gateway device).
One product, multiple advantages
The HMi RAC has a multi-view option that allows for remote management of multiple transfer switches from an intuitive touch screen interface where users can:
• View the status of up to eight transfer switches on a single overview screen
• View and program transfer switch controller set points, control inputs and relay outputs
• Start and stop a generator engine test
• Initiate a transfer to the alternate source
• Bypass a time delay countdown
• Initiate a manual retransfer
• View and silence alarms
• Perform basic troubleshooting
• Analyze metering and trend data of source and load
• Monitor source synchronization during in-phase or closed transition
Key features
• Source and load metering of voltage, current, frequency, power, power factor, voltage unbalance
• Mimic bus graphic indicating status of source available, preferred and connection
• Source health indication
• Date and time stamped event and alarm history
• Programmable transfer switch designations
• Password protection
• Serial (Modbus RTU) and Ethernet (Modbus TCP/IP) communication
• Compatible with Eaton’s ATC-900 and ATC-300+ A automatic transfer switch controllers
Design highlights
• Utilizes Eaton’s HMi (human-machine interface) series
• Display type: 7-inch TFT, 800 x 600, LED backlight
• Touch screen
• NEMAT 4X/IP65
• 24 Vdc operating voltage (ac power supply optional)
• 85 dB multi-tone-frequency alarm buzzer
• Operating temperature: 32–122 °F (0–50 °C)
• Storage temperature: –4 to +140 °F (–20 to +60 °C)
• 10% ~ 90% RH [0 ~ 40C], 10% ~ 55% RH [41 ~ 50C]
• 3 V lithium battery backup (CR2032 x 1)
• Serial interconnect module (included)
• CE and ULT safety approval
AA reduced set of features are available when managing an ATC-300+ controller. Please consult the applicable HMi RAC Instruction Booklet (IB) for details.
Eaton automatic transfer switch (ATS)HMi remote annunciator controller
ATS controller view screen
• Provides status indication of a single ATS including limited control functionality
• Time delay countdown
• Source available, preferred and connected indication
• Metering and health vitals for Source 1, Source 2 and Load
• Manual controls for Go To Emergency, Bypass Timers, Start Engine Test and Manual Retransfer
• System setup
• Event history
• Alarm status
• Real-time trend data graphic for Source 1, Source 2 and Load
• Source synchronization status
• Mimic bus diagram
• Silence audible alarm
• Not in Automatic, Go To Emergency and Emergency Inhibit status indication
• Return to overview screen
ATS overview screen
• Abbreviated status indication for up to eight transfer switches
• Single touch provides quick and easy access to controller view screen for a single ATS
Remote set point editing
• Password protected editing of transfer switch controller set points
• System parameters
• Time delays
• Dropouts and pickups
• Engine test and exerciser
• Programmable I/O
Event history screen
Event messages:
• Preferred Source Avail.
• Overvoltage
• Undervoltage
• Overfrequency
• Underfrequency
• Plant Exerciser
• Engine Test
• Remote Engine Test
• Voltage Unbalance
• Phase Reversal
• Go to Emergency
• Monitor Mode
• More available w/ATC-900
Alarm messages:
• In Lockout
• Engine Test Aborted
• Failed to Sync (Freq.)
• Failed to Sync (Phase)
• S1 Mech Fault
• S2 Mech Fault
• More available w/ATC-900
Manual controls
• Start Engine Test: Password protected control to start and abort an engine test. The engine test will run according to the controller-programmed set points (with or without load)
• Bypass Timers: Provides ability to override programmed time delays
• Go To Emergency: Password protected control to initiate a transfer to the alternate source. Failsafe returns ATS to the normal source if the alternate source fails
• Manual Retransfer: Allows operator to manually initiate a retransfer from the alternate source to the normal source
Source health
• Voltage, frequency, phase loss and voltage unbalance are compared to programmed set points and provide real-time status indication of ‘source health’
• Bar graphs dynamically change color when source is not within programmed set point tolerances
• Trend icon provides single-touch access to source metering waveform data
2 EATON Eaton automatic transfer switch (ATS) HMi remote annunciator controller
Wiring diagrams
Serial diagram
Ethernet diagram
ELC-PS02
120 Vac
B+ 1-A– 2-
COM 3-SHD 4-
J10
RS-485Modbus
ATC-300+
GND
10 9 8 7 6
1 2 3 4 5
HMi Remote Annunciator Control (RAC)touch screen/display
Orange w/white stripeWhite w/orange stripeBlue w/white stripeShield (bare mesh/foil)
White w/orange stripe
Blue w/white stripe
Orange w/white stripe
B(+)A(–)
COMSHLD
J12
RS-485Modbus
ATC-900
Orange w/white stripeWhite w/orange stripeBlue w/white stripeShield (bare mesh/foil)
Front view
Rear view
Note: To remotely manage multiple controller types (ATC-900 and ATC-300+), a dedicated HMi RAC is needed for each controller type. A single HMi RAC cannot manage a mix of ATC-900 and ATC-300+ controller types.
ELC-PS02
LINECOMGND
HMI–(+)HMI–(–)
ELC-PSO2-24VELC-PSO2-0V
SW1
Interconnect module(included with HMi RAC)secure module to COM2 using integral set screws.
LN
24 V
0 V
+
–
GND
POWER
COM
2CO
M1
dc 24 VSlave
Host
System
LAN
Audio
Use BELDEN 3106A(or equal) for Modbus RS-485
SW1RS-485termination
Note: HMi RAC is shipped loose and not installed in the ATS enclosure.Communication and power wiring must be run to the HMi RAC.
RS-485termination
ac power supply (optional—used when external 24 Vdc not available)
ELC-PS02
120VAC GND
ELC-PS02
120 VacGND
PXG gateway
SHLDD2D1
CMN
B(+)A(–)
White w/orange stripeOrange w/white stripe
Blue w/white stripe
Orange w/white stripeWhite w/orange stripeBlue w/white stripeShield (bare mesh/foil)
+–
SG
ELC-CAENET
B(+)A(–)
COMSHLD
J12
RS-485Modbus
ATC-900
Orange w/white stripeWhite w/orange stripeBlue w/white stripeShield (bare mesh/foil)
B+ 1-A– 2-
COM 3-SHD 4-
RS-485Modbus
ATC-300+
J10
Connect to HMi
Note: To remotely manage multiplecontroller types (ATC-900 and ATC-300+), a dedicated HMi RAC is needed for each controller type. A single HMi RAC cannot manage a mix of ATC-900 and ATC-300+ controller types.
ELC-PS02
LINECOMGND
HMI–(+)HMI–(–)
COM
2CO
M1
Slave
Host
System
ELC-PSO2-24VELC-PSO2-0V
LN
24 V
0 V
LAN
Audio
ELC-PS02
LINECOMGND
HMI–(+)HMI–(–)
ELC-PSO2-24VELC-PSO2-0V
LN
24 V
0 V
INCOM
LAN
CAT5e
24 Vdc
Note: Diagram shows direct Ethernetconnection. The gateway may beplaced anywhere on an existingnetwork to communicate to the RAC.
COM1
LAN
SW1
SW1RS-485termination
24 Vdc
Connect as shown usinggateway (PXG900or ELC-CAENET)device. Gateway not providedwith HMi RAC.
ac power supply (optional—used when external 24 Vdc not available)
ac power supply (optional—used when external 24 Vdc not available)
+
–
GND
dc 24 V
RS-485termination
Use BELDEN 3106A(or equal) for Modbus RS-485
HMi Remote Annunciator Control (RAC)touch screen/display
Front view
Rear view
POWER
Note: HMi RAC is shipped loose and not installed in the ATS enclosure. Communication and power wiring must be run to the HMi RAC.
3EATON Eaton automatic transfer switch (ATS) HMi remote annunciator controller
Eaton is a registered trademark.
All other trademarks are property of their respective owners.
Eaton1000 Eaton BoulevardCleveland, OH 44122United StatesEaton.com
© 2017 EatonAll Rights ReservedPrinted in USAPublication No. PA0602020E / Z19494May 2017
HMi RAC dimensions in inches (mm)
Quick and easy panel-mount installation using four fasteners (included). For panel 5 mm thick or less.
Panel-mount Fastener
0.63 (16.0)
0.80 (20.4)
0.64(16.3)
7.24(183.9)
6.79(172.5)
0.063 (1.6)~0.24 (6.1)
5.67(144.0)
5.21(132.3)
ac power supply (optional)
• Can be used when external 24 Vdc is not available to power HMi RAC
• 100–240 Vac, 50/60 Hz input
• DIN rail mount
HMi RAC enclosure (optional)
• ANSI 61 grey finish
• Keyhole slots in the flat cover permit removal without extracting screws
• Grounding provision
• Rear mounting holes and knockout provisions on sides
• UL 50, Type 1
2.17(55.0)
0.52(13.3)
2.36(60.0)
1.28(32.5)
0.12(3.0)
0.12(3.0)
3.54(90.0)
3.94(100.0)
12.00(304.8)
4.00(101.6)
12.00(304.8)
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