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The GE IS420YDOAS1B is a rugged Discrete Output I/O Module designed by General Electric (GE) to serve as a reliable actuation interface within Mark VIe and Mark VIeS distributed control environments. Engineered for high‑density digital switching applications, this module provides precise control of field devices such as relays, contactors, and indicators, translating control logic into actionable outputs with low latency and strong signal integrity. Built for industrial performance and long‑term stability, the IS420YDOAS1B excels in applications where dependable digital output is critical to system operation.

Technical Specifications

Specification	Details
Brand	GE (General Electric)
Model	IS420YDOAS1B
Module Type	Discrete Output I/O Pack
System Compatibility	GE Mark VIe / Mark VIeS
Output Channels	Up to 24 discrete outputs
Signal Type	Open‑collector / transistor outputs
Output Voltage	24 V DC nominal
Maximum Output Current	~500 mA per channel
Response Time	< 1 ms per transition
Communication Interfaces	Dual Ethernet (IONet network)
Power Supply	24–28 V DC
Operating Temperature	‑40 °C to +70 °C
Mounting Style	Terminal board or rack mount
Dimensions (approx.)	121 mm × 42 mm × 83 mm
Weight (approx.)	0.55 kg

The compact form factor supports dense I/O configurations within industrial cabinets.

Recommended Related Models

GE IS420YDIAS1B – Discrete contact input I/O pack
GE IS420YAICS1B – Analog I/O pack for multi‑signal acquisition
GE IS420PPNGH1A – PROFINET gateway module
GE IS420ESWAH1A – 8‑port industrial Ethernet switch

These modules work together to provide comprehensive I/O coverage across digital, analog, and network layers.

Popular Allen Bradley Models

Engineers familiar with Allen‑Bradley platforms may consider the following comparable modules:

Allen‑Bradley 1756‑OB16E – Digital output module
Allen‑Bradley 1734‑OB8 – Compact I/O discrete output module
Allen‑Bradley 1756‑EN2T – EtherNet/IP communication interface
Allen‑Bradley 1756‑L81E – ControlLogix controller

These are widely used in Rockwell Automation systems for discrete signal control and actuation.

Applications

The GE IS420YDOAS1B is ideal for:

Actuating relays, contactors, and solenoids in industrial systems
Digital output control in turbine and generator systems
Process plants requiring high‑density output distribution
Control cabinets in power generation and energy facilities
Functional automation logic implementation with real‑time feedback

Its robust digital output performance supports large‑scale actuation tasks in industrial automation.

Advantages

High‑Density Output Capacity: Up to 24 discrete outputs in a compact module.
Fast Response Times: Sub‑millisecond switching ensures quick actuation.
Strong Signal Integrity: Open‑collector or transistor‑type outputs suited for varied loads.
Dual Ethernet Connectivity: Reliable IONet communication for real‑time control.
Industrial‑Grade Durability: Designed for wide temperature ranges and harsh environments.
Easy Integration: Standard form factor for Mark VIe/VIeS I/O racks and panels.

Technical FAQs

What is the GE IS420YDOAS1B used for?
It is a discrete output module used to control digital actuators and field devices in GE Mark VIe/VIeS systems.
How many discrete outputs does it support?
Up to 24 individual output channels.
What type of outputs does the module provide?
Open‑collector/transistor digital outputs (24 V DC).
What is the typical output current per channel?
Approximately 500 mA maximum per channel (load dependent).
What voltage is required to power the module?
24–28 V DC nominal industrial power.
What is the approximate size of the module?
Around 121 mm × 42 mm × 83 mm (L×W×H).
How much does it weigh?
About 0.55 kg (approximate, depending on configuration).
What communication interfaces are used?
Dual Ethernet ports supporting IONet network interface.
What operating temperature range is supported?
‑40 °C to +70 °C for industrial environments.
Can this be used with safety systems?
Direct safety‑rated application depends on overall architecture and must be paired with appropriate safety controllers.