GE IS200TRTDH1C Mark VI RTD Input Terminal Board

Product Overview

The GE IS200TRTDH1C, also cataloged as the IS200TRTDH1C RTD Input Terminal Board, operates as a dedicated hardware component for temperature sensor signal acquisition within Mark VI Control System platforms. It accepts inputs from standard resistance temperature detectors (RTDs) and transmits the corresponding analog electrical data through cables to the associated I/O processor. The circuit assembly provides terminal connections, transient suppression, and noise filtering for up to 16 RTD channels without disrupting synchronous system processing.

Hardware Specifications

Channel-to-Channel Isolation and Conditioning Matrix

The board utilizes localized analog multiplexing circuit paths to route inputs sequentially to the processor interface. High-frequency filtering networks attenuate common-mode and normal-mode line noise on each input path. Cold junction compensation (CJC) algorithms and physical reference points are maintained via adjacent thermal components on the terminal grid to preserve precise measurement baselines across variable ambient operating conditions. Signal isolation techniques prevent cross-channel leakage, maintaining electrical integrity between low-voltage sensor lines.

Frequently Asked Questions

Q: Can the IS200TRTDH1C terminal board be disconnected from the I/O rack while terminal fields are under thermal load?

A: Unplugging the multi-pin cables connecting the board to the I/O processor is permissible under live rack conditions; however, disconnecting the physical field wiring terminals from active sensors requires proper circuit isolation to prevent open-circuit system diagnostics and downstream control logic trips.

Q: How is the open-circuit sensor condition handled by this board?

A: Each channel layout includes high-resistance pull-up circuitry. In the event of a broken RTD wire or loose connection at the terminal block, the channel voltage hardware signature registers an out-of-range high signal, which the I/O processor translates into a sensor fault alarm.

Field Installation Guidelines

• Mounting Configuration: Secure the board onto a vertical or horizontal DIN-rail layout or internal cabinet sub-panel using the provided integrated hardware standoffs. Ensure it is shielded from direct moisture and ambient vibration.
• Shield Grounding Matrix: Expose the braided shield of the RTD field cables at the entry point of the control panel and bond them securely to the cabinet grounding bar. Do not ground the shield at both ends to eliminate the risk of parasitic ground loops.
• Conductor Requirements: Use twisted, shielded 3-wire copper instrumentation cables for all sensor extensions. Ensure the total lead resistance does not exceed the maximum compensation thresholds defined by the controller baseline specification.
• Screw Terminal Torque Limits: Tighten all termination screws on the terminal block to a maximum specification of 0.56 Nm to prevent thread shearing or intermittent terminal pressure.