IS200TICIH2A - Contact Input Terminal Board

IS200TICIH2A - Contact Input Terminal Board IS200TICIH2A - Contact Input Terminal Board

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Part No.: IS200TICIH2A
Manufacturer: General Electric
Series: Mark VIe
Technology: Surface mount
Size: 17.8 cm high x 33.02 cm wide
Temperature Operating: -30 to +65oC
Number of channels: 24
Availability: In Stock
Country of Manufacture: United States (USA)

Functional Description

IS200TICIH2A is a Turbine Contact Input with Point Isolation (TICI) terminal board developed by GE. It is designed to provide 24 point isolated voltage detection circuits, allowing it to effectively sense a wide range of voltages across relay contacts, fuses, and switches. The isolation of these points is crucial in preventing interference and ensuring accurate voltage readings. The board is controlled by the VCCC, which is responsible for regulating and managing the voltage and current levels in the system. The integration with the VCCC board ensures seamless coordination and precise control over the voltage detection process.


  • The TICI support both simplex and TMR (Triple Modular Redundancy) applications. In simplex mode, the component operates independently, providing accurate voltage detection for straightforward systems. On the other hand, the TMR mode employs a redundant and fault-tolerant approach, with three separate modules working in parallel to enhance system reliability. This redundancy ensures continued operation even if one module were to experience a failure.
  • To facilitate convenient installation and connection, the TICI board is equipped with cables featuring molded plugs. These plugs are specifically designed to connect to the VME (VersaModule Eurocard) rack, where a series of Input/Output (I/O) boards are mounted. The VME architecture is commonly used in industrial and embedded systems due to its compact design and standardized interconnects, making it easy to integrate the board with other components.



To establish the wiring connections for the 24 isolated digital inputs, follow these steps:

  • Take the wires for the 24 isolated digital inputs and connect them directly to two I/O terminal blocks present on the terminal board. These terminal blocks are designed to securely hold the wires in place and can be easily unplugged from the board when maintenance is required. This feature allows for convenient access and troubleshooting of the digital inputs.
  • Each I/O terminal block consists of 24 terminals, providing ample space to accommodate wires with a gauge size of up to #12 AWG (American Wire Gauge). This ensures compatibility with a wide range of wire sizes, offering flexibility in the wiring process.
  • Adjacent to each of the I/O terminal blocks, there is a shield terminal strip that is attached to the chassis ground. This grounding connection helps in shielding the digital inputs from external electromagnetic interference, reducing the risk of signal distortions and ensuring accurate readings.

Cabling Connections:

Depending on the type of system (simplex or TMR) and the level of redundancy (Mark VI or Mark VIe), the cabling connections will vary:

  • Simplex System: In a simplex system configuration, you will need to connect the TICI terminal board to the I/O processor using a connector labeled "JR1." This connector facilitates the communication between the TICI board and the I/O processor, enabling data transfer and control signals.
  • TMR System: In a TMR system configuration, the redundancy level increases, and you will have to connect the TICI terminal board to multiple I/O processors. This connection is achieved using connectors labeled JR1, JS1, and JT1.
  • Cables or I/O Packs: The specific type of cables or I/O packs used for the connection will depend on the type of Mark VI or Mark VIe system being utilized, as well as the level of redundancy required for the application.
  • For simplex and lower levels of redundancy, standard cables may suffice, offering a straightforward connection between the TICI board and the I/O processor(s).
  • In cases where higher levels of redundancy are desired, specialized I/O packs may be used to enhance system reliability and fault tolerance. These I/O packs typically have redundant components that work in parallel to ensure continued operation even if one component fails.


  • No Contact Excitation: The TICI terminal board does not provide any contact excitation itself. Instead, it functions as a passive interface that senses voltage levels across relay contacts, fuses, and switches. By not introducing any excitation signal, the TICI ensures that the detection process remains independent of external influences, enhancing the accuracy of voltage measurements.
  • Electrical Isolation: Each of the 24 inputs on the TICI board is electrically isolated from one another and from the active electronics on the board. This isolation prevents any cross-talk or interference between the inputs, maintaining signal integrity and minimizing the risk of false readings due to electrical coupling.
  • Voltage Detection - DC Inputs: The TICI board is capable of handling different ranges of direct current (DC) input voltages:
    • Range: 70-145 V dc, Nominal: 125 V dc, Detection: 39 to 61 V dc
    • Range: 200-250 V dc, Nominal: 250 V dc, Detection: 39 to 61 V dc
  • For both DC voltage ranges, the TICI board can accurately detect voltages between 39 and 61 V dc. This ability to detect specific voltage levels within a broader range ensures that the system can respond appropriately to different voltage conditions.
  • Voltage Detection - AC Inputs: The TICI board is also designed to handle alternating current (AC) input voltages.
    • Range: 90-132 V rms, Nominal: 115 V rms, Frequency: 47-63 Hz, Detection: 35 to 76 V ac
    • Range: 190-264 V rms, Nominal: 230 V rms, Frequency: 47-63 Hz, Detection: 35 to 76 V ac
  • Similar to the DC inputs, the TICI board can accurately detect AC voltages between 35 and 76 V rms within the specified frequency range. This capability allows it to respond effectively to different AC voltage variations and maintain system stability.

World of Controls has the most comprehensive collection of GE Mark VIe components. Please contact WOC as soon as possible if you require any extra information.


Frequently Asked Questions


What is IS200TICIH2A?
It is an Turbine Contact Input with Point Isolation (TICI) terminal board developed by GE

How are diagnostic tests conducted on the inputs of the terminal board?
During a diagnostic test, all inputs associated with the terminal board are forced to the open contact state (fail-safe state). The system then verifies the response of each input. If any input fails the diagnostic test, it is forced to the fail-safe state, and a fault is created to indicate the problem.

What happens if the input from the terminal board does not match the TMR voted value from all three boards?
In a Triple Modular Redundancy (TMR) system, the input values from all three boards should be identical due to the redundancy. If the input from the specific terminal board does not match the TMR voted value (the value agreed upon by all three boards), a fault is created, indicating a potential inconsistency or malfunction.

How is each terminal board connector identified and verified by the I/O pack/board?
Each terminal board connector has its own ID device, which is read and interrogated by the I/O pack or board. This ID device contains encoded information such as the board's serial number, board type, revision number, and the specific connector location (JR1, JS1, JT1).