GE IS220PAOCH1A Key features
Provides 16 reliable isolated relay outputs for turbine logic execution
Supports panel-mount installation on I/O terminal boards
Relay status LEDs aid in field diagnostics and maintenance
Hot-swappable design simplifies on-site servicing
Fully integrated with GE Mark VIe I/O pack logic
INSTALLATION:
Power off Mark VIe/EX2100 rack before installation
Mount pack to terminal board, fastening bracket screws by Ethernet ports
Plug dual RJ‑45 Ethernet and three-pin power cable
Connect DC‑37 to analog terminal board
Power up and verify analog output with diagnostics tool
Performance comparison
Parameter | IS220PAOCH1A (coated) | IS220PAOCH1 (standard) | IS220PAOCH1B (no LEDs) |
PCB Coating | Yes | No | No |
Ethernet Ports | Dual RJ 45 | Yes | Single |
LED Diagnostics | Yes | Yes | No |
Current Feedback ADC | Yes | Yes | Yes |
Summary:
GE IS220PAOCH1A adds conformal coating and Ethernet redundancy compared to earlier PAOCH1. PAOCH1B lacks LEDs and Ethernet ports, while IS220PAOCH2A adds enhanced temperature monitoring.
Typical cooperation cases
UK – SSE Keadby CCGT Plant Upgrade
Used in turbine control racks for precise valve actuation and loop feedback.
USA – Calpine Los Angeles GT Unit Refurbishment
Installed in analog I/O packs for gas-turbine upgrade ensuring accurate current control.
Australia – AGL Torrens Island Power Station Retrofit
Used in turbine control I/O upgrade. Supported 0–20 mA to actuators under high humidity.
