Description
Product Overview
The IS220PDOAH1A discrete output module from GE’s Mark VIe series delivers precise relay control for gas turbine systems. It integrates a high-speed processor with flash memory and connects directly to terminal boards via a DC-37 pin interface. The module supports up to 12 relays and reads feedback from compatible boards.
Dual RJ45 Ethernet ports provide redundant network access, while a soft-start power input minimizes current inrush. Diagnostic LEDs and an infrared port enable local status monitoring and serial communication. The processor board loads application code from flash memory and verifies compatibility before initiating Ethernet communication.
Technical Specifications
| Specification |
Details |
| Manufacturer |
GE |
| Series |
Mark VIe |
| Model Number |
IS220PDOAH1A |
| Description |
Discrete Output I/O Pack |
| Voltage Range |
27.4–28 V DC |
| Current Draw |
0.71 A DC |
| Dimensions |
8.3 cm × 4.2 cm × 12.2 cm |
| Weight |
340 g |
| Ethernet Ports |
Two 10/100 RJ45 connectors |
| Output Interface |
DC-37 pin connector |
| Power Input |
3-pin connector with soft start |
| Memory |
Flash and RAM |
| Processor |
High-speed with watchdog timer |
Key Features
-
Controls up to 12 electromagnetic or solid-state relays
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Supports TRLYH1B, TRLYH1C, TRLYH1D, TRLYH1E, and IS200TRLYH2F boards
-
Dual Ethernet ports ensure reliable network communication
-
Infrared port enables local diagnostics and serial access
-
LED indicators provide real-time status feedback
-
Soft-start circuit protects components during power-up
-
Compact form factor simplifies installation in tight spaces
Applications & Compatibility
The IS220PDOAH1A module is designed for GE Mark VIe distributed control systems, especially in gas turbine applications. It supports simplex, dual, and TMR configurations and interfaces with six types of discrete output terminal boards. Compatible boards include IS200TRLYH2E, IS200TRLYH3E, IS200TRLYH1F, and IS200TRLYH2F, excluding DIN-rail mounted DRLY types.
Installation Notes
Install one IS220PDOAH1A pack for simplex or three for TMR systems. Secure the pack using threaded studs near the Ethernet ports. Avoid applying lateral force to the DC-37 connector. Connect one or two Ethernet cables depending on system redundancy. Apply power directly—no need to disconnect during insertion due to soft-start protection.
