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The GE IS230TCISH3C is a triple-modular redundant (TMR) contact input assembly for the GE Mark VIe control system, specifically rated for 125 VDC signals. This module is an assembly of the TBCIS1C terminal board and the YDIAS1A I/O pack. It’s designed for high-reliability applications where uninterrupted digital signal monitoring is critical.
Key Features
- TMR (Triple-Modular Redundant): This is the most important feature. The TMR configuration uses three identical modules operating in parallel, and a voting algorithm compares their inputs to ensure accuracy and fault tolerance. This means the system can continue to operate and provide correct data even if one or two modules fail.
- 125 VDC Operation: This assembly is specifically rated to handle digital input signals at 125 VDC, which is a common control voltage in industrial settings like power plants.
- Assembly: The part number indicates that it’s a pre-assembled unit, including the terminal board and the I/O pack, making it a ready-to-install component.
- Contact Input: The module reads binary or on/off signals from field devices such as switches, relays, and push-buttons, converting these physical states into digital data for the controller.
Applications
The IS230TCISH3C is used in industrial settings where the loss of a digital input could lead to a catastrophic event or significant downtime.
- Power Generation: It is used in power plants to monitor the status of critical devices on gas and steam turbines, such as valve limit switches and emergency trip buttons. The TMR redundancy is essential for ensuring that the control system receives vital safety data.
- Oil and Gas: In refineries and offshore platforms, it helps monitor critical discrete signals where continuous operation is essential, such as the open/closed status of emergency shutdown valves or the state of fire and gas detectors.
- Critical Safety Systems: The module is a fundamental component in any safety system where a failure to monitor a digital signal could result in significant equipment damage or a safety risk.
