GE IS220PRTDH1A Rev C GE MARK VIe RTD MODULE 

Part / Model Number: IS220PRTDH1A (Revision A; also in REV D/G variants)

Series: Mark VIe Speedtronic Turbine Control System

Function: PRTD – Resistance Temperature Device input pack

Channels: 8 independent RTD inputs

A/D Converter Resolution: 14-bit

Common-Mode Voltage Range: ±5 V

Maximum RTD Lead Resistance: 15 Ω per channel

Power Supply: 27.4–28.6 V DC (nominal 28 V); ≤ 0.24 A

Ethernet Interfaces: Dual RJ-45 connectors

I/O Connector: DC-37 pin

Front-Panel Indicators: LEDs for Ethernet ports, Power OK, and ATTN (fault)

Certifications: CE-marked, UL-listed

High-Precision RTD Measurement: 14-bit A/D conversion and ±5 V common-mode range for accurate, noise-resistant readings across eight channels.

Modular, Field-Replaceable Pack: Conformal-coated PCB in a vented enclosure for quick field maintenance.

Dual Ethernet Networking: Supports redundant or segregated I/O Ethernet networks.

On-Board Processing & Diagnostics: Local CPU and acquisition board with front-panel LEDs and ATTN flag for fault isolation.

Hazardous-Location Approval: Meets Class I/Div 2 when used with approved terminal boards.

Broad DCS Compatibility: Integrates with GE Speedtronic Mark VIe systems and terminal-hardware.

Robust Industrial Design: DC-37 connector, conformal coating, and rugged package to withstand harsh environments.

Combined cycle power plant in the United States: Bearing temperature monitoring for GE 7HA gas turbines to achieve over-temperature emergency shutdown protection within 150ms Siemens wind power project in Germany: Integrated with Vestas pitch system to monitor gearbox oil temperature and reduce failure rate by 30% 

Australian LNG plant: As a Mark VIe subsystem, it monitors low-temperature leaks in liquefied natural gas pipelines and meets SIL 2 safety standards