IS230TICIH2A - Isolated Input Assembly

IS230TICIH2A - Isolated Input Assembly IS230TICIH2A - Isolated Input Assembly

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Part Number: IS230TICIH2A
Manufacturer: General Electric
Series: Mark VIe
Operating Temperature: -30 to 65 oC
CE Mark: 230 V
Time Delays: 100. 50, 20, 10, and 0 milliseconds
Sub-D Pin Connector: 3
Terminal Block Quantity 2
Size: 17.8 cm high x 33.02 cm wide
Function: Isolated Input Assembly
Availability: In Stock
Country of Manufacture: United States (USA)

Functional Description

IS230TICIH2A is a Isolated Input Assembly manufactured and designed by General Electric. It is a part of the Mark VIe Control System. Its primary function is to provide 24 point isolated voltage detection circuits, which enable the sensing of a wide range of voltages across relay contacts, fuses, and switches. This capability is vital for monitoring and controlling different aspects of electrical circuits and systems.


  • When dealing with 240 V AC applications, it is essential to exercise caution to prevent any inadvertent cross-connections between the 240 V AC and the DC voltages. Doing so can lead to potential issues, particularly related to the peak voltage and the Metal-Oxide Varistor (MOV) rating.
  • An MOV is a type of voltage-dependent resistor that protects electronic devices and circuits from transient voltage spikes by diverting the excess current to the ground. The MOV's effectiveness relies on its ability to handle specific voltage levels. In the case of the TICI terminal board, it is critical to avoid situations where the peak voltage exceeds the MOV's rating, as it could result in MOV failure.
  • In 240 V AC applications, many AC supplies operate with a grounded neutral. If an inadvertent connection occurs between the 125 V DC and the AC voltage, the sum of the AC peak voltage and the 125 V DC will be applied to the MOVs connected between the DC and the ground. This combined voltage might exceed the MOV's rating, leading to its failure.
  • On the other hand, in 120 V AC applications, the MOV rating can withstand the peak voltage without causing a failure. This means that in such scenarios, there is less risk of MOV failure when inadvertently cross-connecting the 120 V AC and the DC voltages.
  • To ensure the proper functioning and safety of the electrical system, it is essential to follow the guidelines and specifications provided by GE for the TICI and any connected devices. Regular maintenance and checks can also help identify and rectify any potential issues early on, ensuring smooth and safe operation throughout the system's lifespan.


  • Terminal Blocks: First, connect the wires for the 24 isolated digital inputs directly to two Input/Output (I/O) terminal blocks provided on the TICI terminal board. Each terminal block is securely held in place with two screws, ensuring a reliable and robust connection. These terminal blocks are designed to be easily unplugged from the board, making maintenance and troubleshooting more convenient.
  • Wire Size: Make sure to use wires that are suitable for the application and within the specifications of the terminal blocks. Each terminal on the block can accept wires up to #12 American Wire Gauge (AWG), providing ample capacity for handling the required current and voltage levels.
  • Shield Terminal Strip: Adjacent to each terminal block, you will find a shield terminal strip that is connected to the chassis ground. It is crucial to properly ground the shields of the input cables to minimize electromagnetic interference (EMI) and ensure signal integrity. Connect the shields of the input cables to the corresponding shield terminal strip for each terminal block.
  • Simplex System Connection: If you are setting up a simplex system, connect the TICI terminal board to the VCCC (Voltage Control and Communication Card) board using connector JR1. This connector establishes the necessary communication and control signals between the TICI and VCCC boards, enabling seamless integration and functionality.
  • TMR System Connection: For a TMR (Triple Modular Redundant) system configuration, you will need to connect the TICI terminal board to the VCCCs (Voltage Control and Communication Cards) using three connectors: JR1, JS1, and JT1. These connectors facilitate communication and redundancy in the TMR setup, ensuring fault tolerance and system reliability.

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What is IS230TICIH2A?
It is a Isolated Input Assembly manufactured and designed by General Electric

How many input channels does the terminal board support for isolated voltage sensing?
The terminal board provides support for 24 input channels for isolated voltage sensing. This allows the monitoring of 24 separate voltage signals from relay contacts, fuses, switches, or other electrical components.

What is the acceptable input voltage range for the terminal board?
The terminal board operates with an input voltage range of 16 to 32 V DC, with a nominal voltage of 24 V DC. This range ensures compatibility with various DC power supply configurations commonly used in electrical systems.

How is the terminal board configured for operation?
The terminal board does not require any physical jumpers or hardware settings for its configuration. The absence of jumpers or hardware settings simplifies the setup process and reduces the chances of misconfigurations.