GE IS220PRTDH1B

Product Overview

The GE IS220PRTDH1B is a Resistance Temperature Device (RTD) Input Module for the GE Mark VIe distributed control system. It is designed to acquire temperature signals from RTD sensors and transfer the measured information through the Mark VIe I/O Ethernet network to the control system. GE documentation officially identifies the IS220PRTDH1B as a Mark VIe Control Resistance Temperature Device (RTD) Input Module.

The module is particularly suitable for turbine and industrial process applications where accurate temperature monitoring is essential. It works with compatible RTD terminal boards, including IS200TRTDH2D, IS200SRTDH1A, and IS200SRTDH2A.

Main Technical Specifications

Parameter	Specification
Manufacturer	General Electric
Product Series	Mark VIe
Model	IS220PRTDH1B
Module Type	RTD Input Module / I/O Pack
Input Type	Resistance Temperature Device
Number of RTD Inputs	Up to 8
RTD Connection	Three-wire RTD
Excitation Current	10 mA DC, multiplexed
RTD Input Voltage	0 to 4.2 V DC
Power Supply	28 V DC nominal
Maximum Supply Current	0.24 A
Communication	Dual Ethernet interfaces
Operating Mode	Simplex
Typical Scan Rates	4 Hz normal, 25 Hz fast
Maximum Cable Resistance	15 ohms bidirectional
Compatible Terminal Boards	IS200TRTDH2D, IS200SRTDH1A, IS200SRTDH2A

GE's technical documentation specifies a 27.4 to 28.6 V DC power supply range and a maximum supply current of 0.24 A. The RTD input circuit operates from 0 to 4.2 V DC with a nominal 10 mA excitation current.

Functional Design

The IS220PRTDH1B combines a processor section with an acquisition section dedicated to RTD measurement. It receives temperature information from the associated terminal board, converts the sensor signals into digital data, and communicates the processed information to the Mark VIe control system.

The module supports simplex operation and provides two RJ45 Ethernet connections for communication with the I/O network. Status LEDs on the front of the pack provide visual information useful during commissioning and maintenance.

The RTD input architecture provides galvanic isolation for the field-side measurement circuit. GE's certification documentation also specifies intrinsic-safety parameters for the IS220PRTDH1B when used with approved terminal-board combinations.

Temperature Measurement and Applications

The module is designed for applications where temperature feedback is required as part of an industrial control or turbine-monitoring system. Typical applications include:

• Gas turbine temperature monitoring
• Steam turbine auxiliary systems
• Generator and rotating equipment
• Industrial process temperature measurement
• Compressor systems
• Power-generation equipment
• Oil and gas process facilities
• Chemical and petrochemical plants

The associated RTD terminal board provides eight three-wire RTD inputs, while the I/O pack processes the acquired signals before transmitting them through the Mark VIe Ethernet network. Depending on the configuration, RTD sensors can be installed at significant distances from the turbine I/O cabinet, with GE documentation specifying up to approximately 300 m (984 ft) under the stated cable-resistance conditions.

Compatibility and Installation

Correct terminal-board selection is important when installing an IS220PRTDH1B. GE documentation identifies the approved combinations with IS200TRTDH2D, IS200SRTDH1A, and IS200SRTDH2A terminal boards.

Before replacement, maintenance personnel should:

1. Confirm the complete part number IS220PRTDH1B.
2. Verify the Mark VIe system configuration.
3. Check the associated RTD terminal board model and revision.
4. Inspect the 37-pin interface connector.
5. Check both Ethernet connections.
6. Inspect RTD field wiring and sensor connections.
7. Confirm the 28 V DC supply is within the specified range.
8. Use appropriate ESD precautions when handling the I/O pack.
9. Check LED diagnostics after powering the system.
10. Verify temperature readings through the control system before returning the equipment to service.

GE also notes that terminal-board revisions are important. For example, the TRTDH2D version provides filtering intended for fast-scan PRTD operation, while an earlier incompatible TRTD revision may generate an incompatibility indication.

Maintenance and Spare-Part Supply

The GE IS220PRTDH1B is an important Mark VIe temperature-input component for facilities requiring reliable RTD measurement and distributed I/O communication. Its combination of dedicated RTD acquisition, Ethernet connectivity, field isolation, and diagnostic functions makes it well suited to demanding industrial control environments.

We supply GE Mark VIe automation spare parts, including IS220 I/O packs, IS200 terminal boards, RTD modules, analog and digital I/O modules, communication components, control boards, and turbine-control system hardware.

For GE IS220PRTDH1B, customers can contact us to confirm availability, product condition, revision, compatibility, lead time, and quotation before ordering.

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