IS200TBCIH3C - Contact Input Terminal Board

IS200TBCIH3C - Contact Input Terminal Board IS200TBCIH3C - Contact Input Terminal Board

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Part Number: IS200TBCIH3C
Manufacturer: General Electric
Series: Mark VIe
Product Type: Contact Input Terminal Board
Number of channels: 24
Power supply voltage: 28 V dc
Voltage Range: 14 to 32 V dc
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: -30 to 65 degrees Celsius
Size: 33.02 cm high x 17.8 cm
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEH-6421M


IS200TBCIH3C is a Contact Input Terminal Board manufactured by General Electric. It is a part of Mark VIe Series used in GE Speedtronic Gas Turbine Control Systems. The Contact Input with Group Isolation (TBCI) terminal board is capable of receiving 24 dry contact inputs that are connected to two barrier-type terminal blocks. For contact excitation, DC power is supplied to the TBCI. Surge and high-frequency noise are protected by noise suppression circuitry in the contact inputs. Do not inadvertently connect the 240 V ac and dc voltages in 240 V ac applications. The peak voltage will exceed the MOV rating, causing the device to fail. Most ac supplies use a grounded neutral, and if an inadvertent connection is made between the 125 V dc and the ac voltage, the sum of the ac peak voltage and the 125 V dc is applied to MOVs connected between dc and ground. In 120 V ac applications, however, the MOV rating can withstand the peak voltage without failing.


  • It accepts 24 dry contact inputs and performs as a Contact Input with Group Isolation terminal board. These are connected to two terminal blocks with barriers (TB1 and TB2.) The 24 contact inputs on each of the terminal blocks have a nominal excitation voltage of 48 V dc.
  • The board in the Mark VI is compatible with VCRC or VTCC boards. Both simplex and TMR (triple modular redundant) applications are supported by the board.
  • Three 37-pin (female) D-type connectors are used in its construction. The codes for them are JR1, JS1, and JT1. These connectors are connected to the VCRC or VCCC boards by cables. Two female plugs with three settings each are included on the board. They have the designations JE1 and JE2.
  • The plugs give the board electricity. When maintenance is required, the 24-position terminal blocks are made to be unplugged from the board and removed.



  • TBCI collaborates with VTCC/VCRC and supports simplex and TMR applications in the Mark VI system.
  • The TBCI is connected to the VME rack housing the VCCC or VCRC processor board by cables with molded connections. Both board variants TBCIH B and TBCIH C are functionally equivalent and work with Mark VI appropriately.


  • The Mark VIe system's TBCI supports simplex, dual, and TMR applications and collaborates with the PDIA I/O pack.
  • The TBCI can accept one, two, or three PDIAs directly. For connector JT1 to be correctly mechanically aligned with the mechanical support of the I/O pack in Mark VIe, this board must be in the C version.


  • The 24 dry contact input wires should be connected directly to two I/O terminal blocks on the terminal board. Two screws hold these blocks in place, and they can be unplugged from the board for upkeep. Each block has 24 terminals that can accommodate wires up to #12 AWG.
  • Just to the left of each terminal block is a shield terminal strip connected to the chassis ground.


  • For each input close to the signal entrance point, filters decrease high-frequency noise and prevent surge. A floating 125 V dc (100-145 V dc) supply is used to power the dry contact inputs on H1 by the turbine control.
  • In the power distribution module, the 125 V dc bus is currently restricted before feeding each contact input. According to the specification table, the H2 and H3 variants operate at lower voltages. The individual input voltage signals are sent to the I/O processor, which then delivers them to the system controller through optical isolators to provide group isolation.
  • A transition threshold equal to 50% of the applied floating power supply voltage is determined by the reference voltage in the isolation circuits.


Input current

  • H3 / S3 (for 48 V dc applications):
  • First 21 circuits draw 2.5 mA
  • Last three circuits draw 10 mA

Fault detection

  • Loss of contact input excitation voltage
  • Non-responding contact input in test mode
  • Unplugged cable

Input filter

  • Hardware filter, 4 ms

WOC has the largest stock of GE Speedtronic Gas Turbine Control System Replacement Parts. We can also repair your faulty boards. WORLD OF CONTROLS can also supply unused and rebuilt backed-up with a warranty. Our team of experts is available round the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on any parts and repairs contact us.


What is IS200TBCIH3C?
It is a Contact Input Terminal Board manufactured by General Electric.

How to Check Price and Availability For this component?
Please Contact World of Controls FZE for sales at +1 609 385 1231 or Request a Quote.

What is the number of channels in the Board?
The component has 24 channels.

What is the power supply voltage required for the Terminal Board?
It requires a power supply voltage of 28 V dc.

What is the voltage range?
The voltage range for the Contact Input Terminal Board is 14 to 32 V dc.

How is the Terminal Board mounted?
It is mounted on a DIN-rail.

What is the technology used?
The Board uses surface mount technology.

How are boards packaged for shipment from WOC?
Parts are placed in antistatic packets and securely packed in ESD boxes cushioned with ESD Foam designed to safeguard electrical components.