The GE IS200SRTDH2ABB, also cataloged as the IS200SRTDH2 Terminal Board, operates as a dedicated hardware component for RTD (Resistance Temperature Detector) signal termination and conditioning within Mark VI control system networks.

Suffix Breakdown & Model Matrix

• IS200: Product Series identifier.
• SRTD: Functional designator (RTD Input Terminal Board).
• H2: Hardware version/revision level.
• ABB: Revision index representing board iteration and manufacturing assembly configuration.

Hardware Specifications

RTD Signal Conditioning and Interface

The SRTD board serves as the primary interface for high-precision temperature monitoring, designed to translate resistive changes into linear voltage signals required by the I/O processor. It features integrated excitation current sources tailored for standard RTD types, ensuring stable readings across long cable runs. The circuitry incorporates filtering to minimize electromagnetic interference, which is critical in environments with high electrical noise. Firmware flash compatibility between this terminal board and the associated I/O pack is maintained to ensure the correct interpretation of resistance-to-temperature conversion curves.

Frequently Asked Questions

Q: How should I wire a 3-wire RTD to this board?

A: Connect the two common wires and the excitation/sense wire to the designated terminal points labeled on the board silkscreen. Ensure that wire resistance is balanced for the two common leads to minimize measurement errors caused by lead-wire effects.

Q: Can this board be used with thermocouples instead of RTDs?

A: No. The IS200SRTDH2ABB is specifically designed for resistive sensing. Utilizing thermocouples would require a different terminal board model specifically engineered for millivolt signal cold junction compensation (CJC).

Field Installation Guidelines

• Mounting: Secure the board into the control cabinet using the provided mounting standoffs. Ensure the board is properly grounded to the cabinet frame to prevent chassis-induced signal noise.
• Wiring: Use shielded, multi-conductor cable for all field sensor connections. Ensure the cable shields are grounded at the cabinet entrance point to avoid creating ground loops.
• Torque: Tighten terminal screws to a maximum torque of 0.5 Nm. Over-tightening may damage the terminal block housing, while under-tightening can result in intermittent resistance readings.
• Verification: Measure the resistance at the terminal inputs using a calibrated bridge meter before connecting the I/O pack to confirm sensor loop continuity and verify the absence of short or open circuits.