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GE IS220PDOAH1A 336A4940CSP2 Mark VIe Discrete Output Pack Module

The GE IS220PDOAH1A 336A4940CSP2 is a high-reliability discrete output module designed for critical industrial control applications.

It operates as part of the Mark VIe I/O pack architecture and connects directly to discrete output terminal boards via high-speed IONet Ethernet communication. The module is capable of controlling multiple relay outputs while also receiving feedback signals from terminal boards, ensuring precise synchronization between controller commands and field device actions.

The unit integrates an embedded processor, acquisition circuitry, and communication interface within a single rugged enclosure. It supports system-level diagnostics, automatic module identification, and output enable logic that keeps all outputs disabled during power-up self-tests to prevent unintended actuation.

This module is widely used in turbine control environments where timing accuracy, fault tolerance, and continuous operation are essential.

Model: GE IS220PDOAH1A 336A4940CSP2
System Compatibility: Mark VI / Mark VIe / Mark VIeS
Module Type: Discrete Output Pack (I/O Pack)

Output Capability:

• Up to 12 relay output channels (system dependent configuration)

• Supports electromagnetic and solid-state relay terminal boards

• Feedback signal input from terminal boards

Communication Interface:

• Dual independent RJ45 Ethernet ports (IONet)

• High-speed deterministic control communication

• System diagnostic and identification messaging

Control Functions:

• Relay output control for actuators and safety devices

• Output enable / disable safety logic

• Real-time status monitoring and fault detection

Power Supply: 28 VDC nominal (system dependent)
Power Consumption: ~5–6 W typical
Operating Temperature: -40°C to +70°C
Storage Temperature: -55°C to +85°C
Humidity: 5%–95% non-condensing
Mounting Type: Mark VIe rack / terminal board system
Cooling Method: Convection cooling (fanless design)

Diagnostics:

• Built-in self-test (BIST) on startup

• LED status indicators (power, network, attention)

• Fault detection and reporting via control system

• Designed for GE Mark VIe turbine control architecture

• High-speed discrete output control via IONet Ethernet

• Supports up to 12 relay output channels

• Dual Ethernet ports for redundancy and reliability

• Output enable safety mechanism prevents startup faults

• Built-in processor for local diagnostics and control logic

• Compatible with multiple terminal board types (TRLY / SRLY series)

• Rugged industrial design for harsh environments

• Continuous 24/7 operation capability for critical systems

GE IS220PDOAH1A 336A4940CSP2 is widely used in:

• Gas turbine control systems

• Steam turbine automation systems

• Power generation plants

• Oil & gas processing facilities

• Industrial distributed control systems (DCS)

• Safety instrumented systems (SIS)

• Compressor and pump control systems

• SCADA-integrated industrial automation networks

Q1: What is the function of IS220PDOAH1A 336A4940CSP2?
A1: It provides discrete relay output control for actuators in GE Mark VIe systems.

Q2: How many outputs does it support?
A2: It typically supports up to 12 relay output channels depending on configuration.

Q3: Does it support redundancy?
A3: Yes, it supports dual Ethernet communication and system-level redundancy in Mark VIe architecture.

Q4: What devices does it control?
A4: It controls valves, motor starters, relays, and safety shutdown devices.

Q5: Is it suitable for harsh environments?
A5: Yes, it is designed for extreme industrial environments such as power plants and offshore systems.

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