The GE IS200SRLYH2ABA, also cataloged as the IS200SRLYH2ABA Simplex Relay Output Terminal Board, operates as a dedicated hardware component for discrete channel switching and isolation within Mark VI and Mark VIe control platforms.
Hardware Specifications
Parameter
Specification
Model
IS200SRLYH2ABA
Brand
General Electric (GE)
Series
Mark VI / Mark VIe Systems
Origin
United States (USA)
Weight
Approx. 300 g (0.66 lbs)
Dimensions
Compact simplex board profile
Operating Temp
0 to +65 deg C (Standard control room cabinet limits)
Power Consumption
Driven via integrated I/O pack backplane power lines
Relay Array
12 Form C relays (Designated K1 through K12)
Maximum Load
125 VDC per relay contact channel
System Topology
Simplex configuration (Single I/O control path)
GE Industrial Control and Deterministic Networks
I/O Density Scaling and Relay Control: The board architecture provides 12 point-to-point physical interlocks across a simplex interface matrix. The Form C configuration assigns an independent common, normally open (NO), and normally closed (NC) contact loop to each relay, optimizing discrete status feedback routing to the main processors without adding external terminal rails.
Contact Arcing and Isolation Control: Every relay channel incorporates galvanic isolation boundaries designed to withstand voltage spikes up to the 125 VDC structural threshold. This setup limits contact switching noise and electrical arcs to the field-side Euro block terminals, ensuring high-frequency switching transients do not corrupt the internal system registers or network communication speeds.
Frequently Asked Questions
Q: Does the IS200SRLYH2ABA support Triple Modular Redundant (TMR) vote-routing pathways?
A: No. The board is structurally hardwired as a simplex module assembly. It maps its 12 relay outputs directly to a single associated I/O pack, omitting the multi-channel voting arrays found on specialized TMR terminal boards.
Q: What configuration prevents inductive field loads from welding the relay contacts?
A: The board relies on field-side suppression circuits. When switching inductive loads like solenoids or large motor starter coils, inline snubber circuits or free-wheeling diodes must be wired externally across the load to safely dissipate inductive energy and prevent contact pitting.
