GE Electric | IS220PDOAH1B | Discrete Output Module

GE IS220PDOAH1B Discrete Output Module

The IS220PDOAH1B is a 16-channel, high-current, relay-based discrete output module designed for GE’s Mark VIe Speedtronic control systems. It acts as an interface between the Mark VIe controller’s low-voltage logic signals and higher-power field devices. Its primary function is to reliably switch electrical power (ON/OFF) to discrete actuators (like solenoid valves, motor starters, contactors, indicator lamps) based on commands received from the controller via the system’s high-speed serial Peer-to-Peer (PDH) network. It features configurable channels, diagnostic capabilities, and supports hot-swapping in compatible systems.

Key Product Parameters & Specifications:

Key Features:

1. High-Current Relay Outputs: Form C contacts capable of switching significant loads (2A @ 250VAC / 30VDC).
2. 16 Independent Channels: Provides control for multiple discrete devices.
3. High Voltage Isolation: Ensures safety and prevents interference between field wiring, logic circuits, and other channels.
4. Peer-to-Peer (PDH) Communication: High-speed deterministic communication over the Mark VIe backplane.
5. Diagnostics: Provides status feedback (module health, comms health, individual channel status) to the controller for enhanced reliability and troubleshooting.
6. Hot Swappable: Allows replacement without shutting down the entire control system (requires compatible Mark VIe rack).
7. Redundancy Support: Integral to achieving high-availability TMR (Triple Modular Redundant) or Simplex control system architectures.
8. Robust Construction: Designed for harsh industrial environments (wide temp range, vibration resistance).
9. Configurable: Channel behavior and properties configured within the Mark VIe ToolboxST application.

Primary Function (Role): The core function of the IS220PDOAH1B is to convert low-voltage digital control signals from the Mark VIe controller into isolated, higher-power switching actions capable of directly controlling industrial field devices requiring ON/OFF operation. It acts as a robust and reliable power switch commanded by the control system.

Primary Purpose (Use): The IS220PDOAH1B is used to energize and de-energize electrical loads in the field. Its outputs are connected to devices that require a simple power switch command.

Typical Applications & Use Cases:

• Opening and closing solenoid valves (fuel, air, water, steam).
• Starting and stopping motors via motor contactors/starters.
• Controlling hydraulic/pneumatic actuators (ON/OFF type).
• Energizing indicator lamps or alarms.
• Triggering other relays or contactors needing a dry contact signal.
• Resetting devices.

Primary Application Fields:

1. Power Generation: Gas Turbines, Steam Turbines, Hydro, Combined Cycle Power Plants (CCPP) – For critical valve control, pump/motor sequencing, lube oil systems, igniters, damper control, annunciators.
2. Oil & Gas: Compressor stations, pipeline control, offshore platforms, refining – Valve control, pump control, safety shutdown systems, burner management.
3. Industrial Process Automation: Chemical plants, pulp & paper, water/wastewater treatment – Equipment sequencing, material handling control, process valve actuation.
4. Marine Propulsion: Control of thrusters, pumps, valves, and auxiliary systems on vessels.
5. Heavy Machinery: Control functions requiring robust switching in demanding environments.