GE IS220PRTDH1A Resistance Temperature Device Input Module

The IS220PRTDH1A is a Resistance Temperature Device (RTD) input module developed by General Electric for the Mark VIe distributed control system. This I/O pack features an onboard processor board shared across Mark VIe distributed modules and a dedicated acquisition board, supporting up to eight RTD input channels with 16-bit A/D conversion resolution. It communicates via dual RJ-45 Ethernet ports and mounts directly onto compatible terminal boards for accurate temperature measurement in industrial control environments.

Functional Architecture and Signal Processing

The module interfaces directly with a terminal board connector via a DC-37 pin connector and receives power through a designated three-pin input. The internal acquisition board manages the high-precision sampling of temperature signals, while dual RJ-45 Ethernet connectors provide redundant or standard network integration into the Mark VIe control architecture.

Configuration and System Redundancy

The module supports multiple system architectures depending on reliability requirements. Simplex configurations utilize a single I/O pack with one or two network connections. Dual configurations employ two I/O packs with one or two network connections, while Triple Modular Redundancy (TMR) setups use three I/O packs, each with one network connection to ensure fault tolerance.

Terminal Board Compatibility

The IS220PRTDH1A is compatible with SRTD boards and TRTD terminal board versions TRTDH1D and TRTDH2D, but is physically and electrically incompatible with DIN-rail mounted DRTD boards. The TRTDH1D board provides standard filtering matched to the regular scan rate, whereas the TRTDH2D board provides reduced filtering to accommodate the rapid scan rate mode. Using the pack with older TRTD board versions will trigger an incompatibility fault without causing physical damage.

Frequently Asked Questions

Q: Which terminal boards are compatible with the IS220PRTDH1A module?

A: It is compatible with SRTD boards as well as TRTDH1D and TRTDH2D terminal boards. DIN-rail mounted DRTD boards are not supported.

Q: How does the terminal board selection affect the module scan rate?

A: The TRTDH1D version matches standard scan rates with higher filtering, while the TRTDH2D version offers reduced filtering to support the 25 Hz rapid scan rate configuration.