THOMSON TSC 900 Service manual

9087A –198th Street, Langley, BC Canada V1M 3B1 Telephone [phone]
Telefax [phone] E-Mail: [email protected] www.thomsonps.com
TSC 900
TRANSFER SWITCH CONTROLLER
INSTALLATION, OPERATING &
SERVICE MANUAL
Part ID PM151 REV 5 16/04/19

TSC 900 TRANSFER SWITCH CONTROLLER
PM 151 REV 5 16/04/19 Thomson Power Systems

TSC 900 TRANSFER SWITCH CONTROLLER
PM 151 REV 5 16/04/19 Thomson Power Systems
TABLE OF CONTENTS
1. INTRODUCTION 1
1.1. PRODUCT REVISION HISTORY 1
1.2. GENERAL DESCRIPTION 2
2. INSTALLATION 2
2.1. GENERAL INFORMATION 3
2.2. NOTES TO INSTALLER 3
2.3. TSC 900 GHC MOUNTING 4
2.4. AC VOLTAGE SENSING INPUT 5
2.5. AC CURRENT SENSING INPUT 7
2.6. AC CONTROL POWER INPUT 8
2.7. AUXILIARY DC CONTROL POWER INPUT 8
2.8. PROGRAMMABLE INPUTS 8
2.9. OUTPUTS 8
2.10. EXTERNAL ATS CONTROL WIRING 8
2.11. REMOTE START CONTACT FIELD WIRING 9
2.12. COMMUNICATION CABLE INSTALLATION 10
2.13. DIELECTRIC TESTING 10
3. DESCRIPTION 11
3.1. GRAPHICAL HMI CONTROLLER (GHC) DISPLAY HARDWARE 12
3.2. SWITCH CONTROL UNIT (SCU) HARDWARE 13
3.3. ATS OPERATION MODE DESCRIPTIONS 15
3.4. AUTOMATIC SEQUENCE OF OPERATION 17
3.4.1. OPEN TRANSITION TRANSFER 17
3.4.2. CLOSED TRANSITION TRANSFER 17
3.4.3. DUAL SOURCE ATS 19
3.4.4. AUTOMATIC LOAD SHED OPERATION 22
3.4.5. TEST MODE 23
3.4.6. ABNORMAL SEQUENCE OF OPERATION 24

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3.5. GHC DISPLAY MAIN MENU PAGE DESCRIPTIONS 25
3.5.1. HOME PAGE 26
3.5.2. UTILITY METERING PAGE 27
3.5.3. GENERATOR METERING PAGE 27
3.5.4. LOAD METERING PAGE 28
3.5.5. ALARMS PAGE 28
3.5.6. ALARMS LOG PAGE 29
3.5.7. EVENTS LOG PAGE 31
3.5.8. SYNC PAGE 32
3.5.9. SCHEDULER PAGE 33
3.5.10. SETTINGS PAGE 33
3.5.11. SYSTEM PAGE 34
3.6. GHC DISPLAY SYSTEM SUBMENU PAGE DESCRIPTIONS 35
3.6.1. IMPORT/EXPORT DATA 35
3.6.2. DATE / TIME SETUP 35
3.6.3. MANAGE USERS 36
3.6.4. SYSTEM INFORMATION 36
3.6.5. INPUT MAPPING 37
3.6.6. OUTPUT MAPPING 37
3.6.7. LOGS 38
3.6.8. COMMUNICATION STATUS 38
3.6.9. MIMIC BUS CUSTOMIZATION 39
3.6.10. FIRMWARE UPDATES 39
3.6.11. GHC HEALTH 39
4. OPERATING INSTRUCTIONS 40
4.1. GHC SCREEN PAGE NAVIGATION 40
4.2. HELP INFORMATION 40
4.3. ON LOAD TEST INSTRUCTIONS (UTILITY POWER FAIL SIMULATION) 41
4.4. OFF LOAD TEST INSTRUCTIONS (GENERATOR NO LOAD TEST) 42
4.5. TIMED TEST INSTRUCTION 43
4.6. OPEN/CLOSED TRANSITION TRANSFER OPERATION 45
4.6.1. OPEN TRANSITION IN-SYNC TRANSFER OPERATION (MODEL X) 46
4.6.2. CLOSED TRANSITION OPERATION (FAST TRANSFER MODEL 3) 46
4.6.3. CLOSED TRANSITION OPERATION (SOFT-LOAD TRANSFER MODEL 4) 47
4.7. DUAL SOURCE ATS OPERATION 50
4.7.1. DUAL SOURCE - CHANGING PREFERRED UNITS (GHC CONTROL) 51
4.8. TRANSFER FAIL ALARM RESET 52

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4.9. TIMER BYPASS 52
4.10. MANUAL UTILITY RETRANSFER CONTROL 53
4.11. SERVICE DISCONNECT MODE 53
4.12. PHASE UNBALANCE PROTECTION ALARM RESET 54
4.13. TRANSFER HALTED ALARM RESET 55
4.14. ABNORMAL SOURCE ALERT 56
5. PROGRAMMING INSTRUCTIONS 57
5.1. PASSWORD SECURITY DESCRIPTION (USERS ADMIN) 57
5.2. USER LOGIN PROCEDURE 58
5.3. ADMINISTRATOR PASSWORD MANAGEMENT PROCEDURE 59
5.4. SYSTEM TIME/DATE ADJUSTMENT 60
5.5. VOLTAGE CHANGE PROCEDURE 61
5.6. REMOTE COMMUNICATION SETUP 63
5.7. EXERCISE TIMER SETUP 63
5.7.1. ADDING NEW EXERCISE SCHEDULE EVENT 63
5.7.2. EDITING EXISTING EXERCISE SCHEDULE EVENT 64
5.8. PROGRAMMABLE DIGITAL INPUT MAPPING 65
5.8.1. TS 870 STANDARD/SERVICE ENTRANCE INPUT DEFAULTS: 65
5.8.2. TS 870 DUAL SOURCE INPUT DEFAULTS: 65
5.8.3. TS 880 (ICS) STANDARD/SERVICE ENTRANCE INPUT DEFAULTS: 66
5.8.4. TS 880 (ICS) CLOSED TRANSITION INPUT DEFAULTS: 66
5.8.5. PROGRAMMABLE INPUT FUNCTION LIST 67
5.8.6. PROGRAMMABLE INPUT FUNCTION MAPPING 69
5.8.7. PROGRAMMABLE INPUT USER DEFINED CUSTOM NAME MAPPING 70
5.9. PROGRAMMABLE OUTPUT MAPPING 72
5.9.1. TS 870 STANDARD/SERVICE ENTRANCE OUTPUT DEFAULTS: 72
5.9.2. TS 870 DUAL SOURCE OUTPUT DEFAULTS: 72
5.9.3. TS 880 (ICS) STANDARD/SERVICE ENTRANCE OUTPUT DEFAULTS: 72
5.9.4. TS 880 (ICS) CLOSED TRANSITION OUTPUT DEFAULTS: 72
5.9.5. PROGRAMMABLE OUTPUT FUNCTION LIST 73
5.9.6. PROGRAMMABLE OUTPUT FUNCTION MAPPING 76
5.10. SYSTEM SETTINGS 77
5.10.1. SYSTEM PHASES 78
5.10.2. SYSTEM VOLTAGE 78
5.10.3. SYSTEM FREQUENCY 78

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5.10.4. PHASE ROTATION REVERSED 78
5.10.5. RATED GENERATOR POWER 78
5.10.6. CT RATIO (CURRENT TRANSFORMER) 78
5.10.7. PT RATIO (POTENTIAL TRANSFORMER) 78
5.10.8. LOAD NAME 79
5.10.9. SOURCE 1 (UTILITY) NAME 79
5.10.10. SOURCE 2 (GEN) NAME 79
5.10.11. APPLICATION MODEL 79
5.10.12. SWITCH OPERATION 79
5.10.13. SWITCH MODEL 79
5.11. OPTION SETTINGS 79
5.11.1. SRC 2 (GEN) COMMIT TO TRANSFER 79
5.11.2. ENABLE LOAD SHED ON UNDER FREQUENCY 80
5.11.3. ENABLE LOAD SHED ON OVER POWER 80
5.11.4. HALT OPERATION ON PHASE REVERSAL 80
5.11.5. MANUAL SRC 1 (UTILITY) RETRANSFER CONTROL 80
5.11.6. FORCE TRANSFER 81
5.11.7. GHC SLEEP MODE TIMEOUT 81
5.11.8. LOAD POWER METERING 81
5.11.9. MODBUS RTU 81
5.11.10. MODBUS TCP/IP 82
5.11.11. ENABLE SECURITY BYPASS 82
5.11.12. ENABLE NEUTRAL DELAY BYPASS 82
5.11.13. ENABLE TRANSFERS TO SRC 1 (UTILITY) 82
5.11.14. ENABLE TRANSFERS TO SRC 2 (GENERATOR) 83
5.11.15. ENABLE FAIL TO AUTO SYNC ALARM 83
5.11.16. ENABLE HALT TRANSFER ON FAIL TO EXTERNAL SYNC CHECK 83
5.11.17. ENABLE CLOSED TRANSITION TRANSFER (CTTS MODEL 3 & 4) 83
5.11.18. REVERT TO OPEN TRANSITION 84
5.11.19. ENABLE FAIL TO UNLOAD ALARM (CTTS MODEL 4) 84
5.11.20. ENABLE EXTENDED PARALLEL MODE (CTTS MODEL 4) 85
5.11.21. ENABLE SOFT-LOAD TRANSFER (CTTS MODEL 4) 85
5.11.22. ENABLE START OF MULTIPLE GENS WHEN RESUMING FROM STANDBY 85
5.11.23. PREFERRED SOURCE ALTERNATION INTERVAL 86
5.11.24. TRIP UTILITY (SRC 1) WHEN CLOSED TRANSITION INHIBIT ACTIVATED 86
5.11.25. CURRENT METERING 86
5.11.26. ENABLE OPEN TRANSITION IN-SYNC TRANSFER (ATS MODEL X) 86
5.12. DELAY SETTINGS 87
5.12.1. UTILITY (SRC 1) RETURN DELAY 87
5.12.2. GEN (SRC 2) COOL DOWN DELAY 87
5.12.3. GEN (SRC 2) START DELAY 87

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5.12.4. GEN (SRC 2) WARM UP DELAY 87
5.12.5. TRANSFER NEUTRAL DELAY 88
5.12.6. TRANSFER PRE DELAY (LDC) 88
5.12.7. TRANSFER POST DELAY (LDC) 88
5.12.8. SRC 2 (GEN) GEN COMMIT TO TRANSFER DELAY 88
5.12.9. TRANSFER FAIL DELAY 88
5.12.10. TRANSFER MAX ERROR CONDITION DELAY 88
5.12.11. GEN (SRC 2) FAILED TO START DELAY 89
5.12.12. DISCONNECTION RESUME TIME 89
5.12.13. TRIP RETRY ON/OFF PULSE TIME (SRC1&2) 89
5.12.14. TRIP RETRY DURATION TIMER (SRC1&2) 89
5.12.15. CLOSE RETRY ON/OFF PULSE TIME (SRC1&2) 89
5.12.16. CLOSE RETRY DURATION TIMER (SRC1&2) 90
5.12.17. TIMER GUARD DELAY 90
5.12.18. FIND NEUTRAL DELAY 90
5.12.19. RETURN TO PREFERRED SOURCE DELAY 91
5.12.20. WAIT FOR PREFERRED SOURCE DELAY 91
5.12.21. TRANSFER FROM PREFERRED SOURCE DELAY 91
5.13. UTILITY/GEN SET POINTS (VOLTAGE/FREQUENCY) 91
5.13.1. UNDER VOLTAGE DELAY (DROPOUT) 92
5.13.2. UNDER VOLTAGE DROPOUT 92
5.13.3. UNDER VOLTAGE PICKUP 92
5.13.4. OVER VOLTAGE DELAY (PICKUP) 92
5.13.5. OVER VOLTAGE DROPOUT 92
5.13.6. OVER VOLTAGE PICKUP 92
5.13.7. PHASE UNBALANCED VOLTAGE LATCH 92
5.13.8. PHASE UNBALANCE DELAY (PICKUP) 93
5.13.9. PHASE UNBALANCE DROPOUT 93
5.13.10. PHASE UNBALANCE PICK UP 93
5.13.11. UNDER FREQUENCY DELAY (DROPOUT) 93
5.13.12. UNDER FREQUENCY DROPOUT 93
5.13.13. UNDER FREQUENCY PICKUP 94
5.13.14. OVER FREQUENCY DELAY (PICKUP) 94
5.13.15. OVER FREQUENCY DROPOUT 94
5.13.16. OVER FREQUENCY PICKUP 94
5.13.17. VOLTAGE SOURCE BLACKOUT DELAY (DROPOUT) 94
5.13.18. VOLTAGE SOURCE BLACKOUT DROPOUT 94
5.13.19. VOLTAGE SOURCE BLACKOUT PICKUP 94
5.13.20. VOLTAGE ROTATION REVERSAL DELAY (PICKUP) 95
5.13.21. VOLTAGE ROTATION REVERSAL DROP OUT 95
5.13.22. VOLTAGE ROTATION REVERSAL PICK UP 95

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5.14. LOAD VOLTAGE SET POINTS 95
5.14.1. LOAD VOLTAGE BLACKOUT DELAY (DROPOUT) 95
5.14.2. LOAD VOLTAGE BLACKOUT DROPOUT 95
5.14.3. LOAD VOLTAGE BLACKOUT PICKUP 95
5.15. LOAD SHED FREQUENCY & POWER SET POINTS 96
5.15.1. LOAD SHED INITIATE DELAY 96
5.15.2. LOAD SHED UNSHED DELAY 96
5.15.3. LOAD SHED FREQUENCY DELAY (PICKUP) 97
5.15.4. LOAD SHED FREQUENCY PICK UP 97
5.15.5. LOAD SHED FREQUENCY DROP OUT 97
5.15.6. LOAD SHED POWER (kW) DELAY (PICKUP) 97
5.15.7. LOAD SHED POWER (kW) DROP OUT 97
5.15.8. LOAD SHED POWER (kW) PICK UP 97
5.16. IN-SYNC TRANSFER SET POINTS 97
5.16.1. IN-SYNC WAIT DELAY 97
5.16.2. EXTERNAL SYNC CHECK WAIT DELAY 98
5.16.3. FAIL TO UNLOAD TIMER (CTTS MODEL 4) 98
5.16.4. CLOSED TRANSITION MAX OVERLAP TIMER 98
5.16.5. SOURCE FREQUENCY DIFFERENTIAL HIGHER THRESHOLD 98
5.16.6. SOURCE FREQUENCY DIFFERENTIAL LOWER THRESHOLD 99
5.16.7. SOURCE VOLTAGE DIFFERENTIAL HIGHER THRESHOLD 99
5.16.8. SOURCE VOLTAGE DIFFERENTIAL LOWER THRESHOLD 99
5.16.9. TRANSFER SWITCH MECHANISM OPERATION TIME 99
6. FACTORY DEFAULT PROGRAMMING 100
7. TSC 900 TYPICAL CONNECTION DIAGRAM 104
8. TSC 900 WIRING PIN CONNECTIONS 105
9. TROUBLESHOOTING 106
10. REPLACEMENT PARTS 110
11. PRODUCT RETURN POLICY 111
12. NOTES 112

TSC 900 TRANSFER SWITCH CONTROLLER
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1. INTRODUCTION
1.1. PRODUCT REVISION HISTORY
The following information provides an historical summary of changes made to this product since
the original release.
SCU Firmware Version
621, 15/04/07
Original Release
867, 15/10/03
Add Closed Transition Transfer Capability, Misc.
Feature Enhancements & Bug Fixes
888, 15/10/28
Add Dual Source Capability, Misc. Feature
Enhancements & Bug Fixes
902, 15/11/18
Add Remote Load Dump Control (RLDC) feature
capability
GHC Firmware Version
1.0.0.0 15/04/07
Original Release
1.1.0.xxxxx 15/10/03
Add Closed Transition Transfer Capability, Misc.
Feature Enhancements & Bug Fixes
1.1.0.16017 15/10/30
Add Dual Source Capability, Misc. Feature
Enhancements & Bug Fixes
1.1.5805.19916 15/11/18
Add Remote Load Dump Control (RLDC) feature
capability
1.1.5952.22994 16/04/19
Update Alarm Tag Names, add GHC Firmware
Update, Misc. Feature Enhancements & Bug Fixes
Operating & Service Manual Version
Rev 0 15/04/07
Original release
Rev 1 15/10/08
Add Closed Transition Transfer Capability, Misc.
Feature Enhancements & Bug Fixes
Rev 2 15/11/11
Add Dual Source Capability, Misc. Feature
Enhancements & Bug Fixes
Rev 3 15/11/24
Add Remote Load Dump Control (RLDC) Feature
capability
Rev 4 16/01/15
Update Alarm Tag Names, add GHC Firmware
Update, Add TSC 900 Faceplate mounting
information
Rev 5 16/04/19
Miscellaneous minor manual revisions
Related Product Instruction Manuals
•TSC 900 ModbusTM Communication, PM152
•TS 870 Instruction Manual, PM062
•TS 870 Quick Start Manual, PM150
•TS 880 Instruction Manual, PM064
Contact Thomson Power Systems, to obtain these instruction manuals. A soft-copy of the most
current versions of these manuals are available at www.thomsonps.com.

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1.2. GENERAL DESCRIPTION
The TSC 900 controller utilizes multiple 32-bit microprocessor-based design technology, which
provides high accuracy for all voltage sensing and timing functions. Digital Signal Processing
(DSP) technology is utilized for all voltage, frequency and current sensing. The TSC 900 is
factory configured to control all the operational functions and display features of the automatic
transfer switch. All features of the TSC 900 are fully programmable from the front panel color
graphical touchscreen display and are security password protected. The graphical touchscreen
display screen provides a user-friendly operator interface with many display options available.
2. INSTALLATION
CAUTION!!!
This equipment contains static-sensitive parts. Please observe the following
anti-static precautions at all times when handling this equipment. Failure to
observe these precautions may cause equipment failure and/or damage.
The following precautions must be observed:
•Discharge body static charge before handling the equipment (maintain exposed body contact
with a properly grounded surface while handling the equipment, a grounding wrist strap
can/should also be utilized).
•Do not touch any components on the printed circuit board with your hands or any other
conductive equipment.
•Do not place the equipment on or near materials such as Styrofoam, plastic and vinyl. Place
the equipment on properly grounded surfaces and only use an anti-static bag for transporting
the equipment.

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2.1. GENERAL INFORMATION
NOTE:
Installations should be done in accordance
with all applicable electrical regulation
codes as required.
The following installation guidelines are provided for general information only pertaining to
typical site installations. For specific site installation information, consult Thomson Power
Systems as required. NOTE: Factory installations of THOMSON POWER SYSTEMS supplied
transfer switches that have been tested and proven may deviate from these recommendations.
2.2. NOTES TO INSTALLER
If the transfer switch has programmable/multi-tap system voltage capability (refer to electrical
schematic), confirm the transfer switch has been configured for the system voltage.
WARNING
Failure to confirm and match transfer
switch voltage with the system voltage
could cause serious equipment damage.
If the transfer switch requires reconfiguring, the TSC 900 controller will also require
reprogramming.
CAUTION!!!
Qualified personnel must complete all installation and/or service work performed
only. Failure to do so may cause personal injury or death.

TSC 900 TRANSFER SWITCH CONTROLLER
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2.3. TSC 900 GHC MOUNTING
When the TSC 900 display (GHC) is supplied as part of a Thomson Power System automatic
transfer switch, the GHC is mounted on the ATS door with PEM studs as part of the door design.
When the TSC 900 GHC is supplied loose for door mounting, it can be supplied with a door
mounting faceplate with Lexan overlay (PART No’s 014222, 014221) which requires a
rectangular door cut-out and mounting holes to be drilled as per the following drawings.
GHC
SCU
(Optional
Mounting)

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2.4. AC VOLTAGE SENSING INPUT
The TSC 900 can accept direct AC voltage sensing inputs on the generator, utility and load from
120-600VAC (nominal). Sources upto 600VAC(phase tophase) can be connected wye or delta
with grounded or ungrounded neutral without the need for additional sensing transformers. The
TSC 900 voltage sensing can support the following types of electrical systems:
Refer to Section 5.10.2 for system voltage programing instructions.

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Voltage sensing connections for the most common applications are shown in the following
diagrams.

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2.5. AC CURRENT SENSING INPUT
The TSC 900 can accept 4 x 0-5Aac current inputs from the secondary windings of current
transformers (CT’s). CT’s are to be connected on the load side of the ATS (Phase A, B, C & N).
Wiring of CT primary and secondary windings must be done in strict accordance with schematic
diagram to ensure the correct phasing on 3 phase systems.
WARNING
Do not unplug any current transformer inputs while
energized as severe high voltages can develop which may
cause personal injury or death.
Current sensing connections for the most common applications are shown in the following
diagrams.

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2.6. AC CONTROL POWER INPUT
The TSC 900 requires 120VAC (nominal) control power input voltage. Independent AC control
power is required from both utility and generator supplies via potential transformers. AC control
power is utilized for internal TSC 900 control circuits and external control device loads. The
TSC 900 typically requires approximately 12VA AC power for internal control circuits but may
draw up to 30VA dependent upon external loads connected. The maximum external load is
limited by output contact ratings (i.e. 10A resistive, 120/250VAC). Total AC control power
requirements for each supply must be determined by adding both internal and external load
requirements.
2.7. AUXILIARY DC CONTROL POWER INPUT
The TSC 900 can be optionally supplied with 24VDC auxiliary control power input voltage for
applications requiring continuously energized control and display features. The maximum input
power draw is 25W. The 24VDC power must be from a regulated/filtered DC supply with
maximum +-10% voltage range.
2.8. PROGRAMMABLE INPUTS
The TSC 900 provides Qty 16 Programmable Inputs. Each input is activated by external contact
closure to common (i.e. DC Negative ground). Each programmable input can be independently
programmed to different functions. Refer to Programming section for available features.
2.9. OUTPUTS
The TSC 900 provides the following types of output circuits:
Engine Start Contacts
Qty 2
Isolated Form B contacts (10A, 250VAC Resistive)
Programmable Output Contacts
Qty 8
Isolated Form C contacts (2A, 250VAC Resistive)
Close to Utility (SRC1) Supply
Qty 1
120VAC1, 10A (Resistive) powered output contact
Close to Gen (SRC2) Supply
Qty 1
120VAC1, 10A (Resistive) powered output contact
Trip Utility (SRC1) Supply
Qty 1
120VAC1, 10A (Resistive) powered output contact
Trip Gen (SRC2) Supply
Qty 1
120VAC1, 10A (Resistive) powered output contact
1 NOTE: Output voltage is dependent upon AC control power input voltage.
Interposing relays are required between the TSC 900 outputs and the end device if loads exceed
the output current rating.
2.10. EXTERNAL ATS CONTROL WIRING
As a minimum, all external control wiring to/from the ATS must conform to the local regulatory
authority having jurisdiction on electrical installations. Specific wire sizes listed below are for
typical circuits of distances up to 500ft (150m)1, are as follows:
Utility or Generator Voltage Sensing #14 AWG (2.5mm2)

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Transfer output signals #14 AWG (2.5mm2)
Remote Start Contact for Engine Controls #14 AWG (2.5mm2)
NOTE: For long control wire runs or noisy electrical environments the control wires
should be twisted & shielded with a suitable drain wire. The shielded cable drain wire
must be grounded at one end only. The drain wire grounding location may vary as micro-
processor controllers generally exist at both ends (engine generator set & transfer
switch) and one may be more susceptible depending on the level of induced noise. The
most susceptible controller will require the shield ground point as close as possible to
the controller. Wire runs from 500ft to 1000ft should be twisted and shielded and
increased to #12 AWG where total loop resistance is greater than 5 ohms.
1For distances exceeding 1000ft. (300m) consult Thomson Power Systems
2.11. REMOTE START CONTACT FIELD WIRING
Field wiring of a remote start contact from a transfer switch to a control panel should conform to
the following guidelines to avoid possible controller malfunction and/or damage.
2.8.1. Remote start contact wires (2 #14 AWG (2.5mm2)) should be run in a separate
conduit (ferromagnetic type) and in all cases separated from any AC wiring.
2.8.2. Avoid wiring near AC power cables to prevent pick-up of induced voltages.
2.8.3. An interposing relay may be required if field-wiring distance is excessively long
(i.e. greater than 1000 feet (300m)) and/or if a remote contact has a resistance
of greater than 5.0 ohms. In extremely noisy environments, the wire run lengths
indicated may not provide reliable operation and can only be corrected by the
use of an interposing relay. The interposing relay is generally installed at the
engine controls and utilizes DC power. It is strongly suggested that the ground
return wire of the interposing relay be used for the interface to the TSC 900
remote start contact, this will ensure integrity of the DC power supply to the
engine generator set controls in the event of a shorted or grounded wire remote
start interface wire.
2.8.4. The remote start contact provided is voltage free (i.e. dry contact). Exposing the
remote start contact to voltage or current levels in excess of its rating will damage
the transfer controller.

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2.12. COMMUNICATION CABLE INSTALLATION
Communication cable wiring from the controller’s communication port must be suitably routed
to protect it from sources of electrical interference. Guidelines for protection against possible
electrical interference are as follows:
•Use high quality, shielded cable only with drain wire grounded at the controller end
only.
•Route the communication cable at least 3 M (10’) away from sources of electrical
noise such as variable speed motor drives, high voltage power conductors, UPS
systems, transformers, rectifiers etc.
•Use separate, dedicated conduit runs for all communication cables. Do not tightly
bundle communication cables together in the conduit. Conduit should be
ferromagnetictype near sources of possible electrical interference. The entire length
of conduit should be grounded to building earth ground.
•When communication cables must cross over low or high voltage AC power
conductors, the communication cables must cross at right angles and not in parallel
with the conductors.
For additional information on protection against electrical interference, contact
THOMSON POWER SYSTEMS factory.
2.13. DIELECTRIC TESTING
Do not perform any high voltage dielectric testing on the transfer switch with the TSC 900
controller connected into the circuit, as serious damage will occur to the controller. All AC control
fuses or control/sensing circuit isolation plugs connected to the TSC 900 must be
removed/disconnected if high voltage dielectric testing is performed on the transfer switch.

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3. DESCRIPTION
The TSC 900 controller consists of two parts; a front door mounted graphical touch screen display
(GHC), and a switch control unit (SCU) which is mounted inside the transfer switch door. The two parts
are interconnected via a USB 3.0A-to-micro-B high speed communication cable which includes DC
power.
USB 3.0 Cable
GHC
SCU

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3.1. GRAPHICAL HMI CONTROLLER (GHC) DISPLAY HARDWARE
The GHC Display is shown as in FIGURE 7. The GHC is interconnected to the SCU via a plug-
in USB cable. The main features of the GHC Display are described as follows with reference to
FIGURE 7.
FIGURE# 7
1. RS232 Communication Port #1: This port is utilized for Modbus RTU Serial communication
2. RS232 Communication Port #2: This port is utilized RS232 Serial communication
3. USB Communication Port #1: This port is utilized for communication from GHC to TSC 900 SCU
module.
4. Ethernet Communication Port: This port is utilized for Modbus TCP Ethernet communication
5. USB Communication Port #2: This port is utilized for customer use.
6. USB Communication Port #3: This port is utilized for customer use.
7. SD Memory Card Slot: This is used for program operation and memory storage
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7