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GE IS200STCIH2A Simplex Contact Input Terminal Board

The GE IS200STCIH2A, also cataloged as the IS200STCI Simplex Contact Input Terminal Board, operates as a dedicated hardware component for discrete contact signal acquisition within GE Mark VI turbine control platforms. It provides conditioned field contact interfaces between external devices and PAIC/PDIA I/O pack assemblies.

Hardware Specifications

Parameter	Specification
Model	IS200STCIH2A
Brand	GE Industrial Systems
Origin	USA
Weight	2 lbs
Operating Temp	-40 to +85 deg C
Power Consumption	External excitation source, current limited to 0.5 A
Product Type	Terminal Boards
Series	Mark VI Turbine Control System
Functional Description	Simplex Contact Input Board
I/O Configuration	24 dry contact inputs
I/O Redundancy	Simplex
Excitation Voltage	24 VDC, 48 VDC, 125 VDC configurable
Input Current	2.5 mA for first 21 circuits, 10 mA for last 3 circuits
Threshold Voltage	50% of excitation voltage
Isolation	2.5 kV RMS channel-to-ground
Hardware Filter Delay	4 ms
Connector Interface	37-pin D-type connector and 3-position plug
Wiring Interface	52 terminals via right-angle header
Compatible I/O Pack	PDIA / PAIC interface

Deterministic I/O Processing and Industrial Control Interface

The IS200STCIH2A provides discrete input conditioning for GE Mark VI control systems through multi-voltage excitation circuits and filtered contact detection paths. The terminal board processes external switch and relay contact states before transferring conditioned signals to the connected I/O pack interface.

GE industrial control architectures require deterministic I/O communication between terminal boards and controller assemblies. The STCI board supports I/O density scaling through 24 contact input channels and provides surge suppression, high-frequency filtering, and input stabilization for electrically noisy environments.

The board integrates with GE Mark VI platforms using PAIC/PDIA I/O pack connections. Hardware design includes firmware-compatible I/O processing support, signal conditioning circuits, and electrical isolation between field wiring and control-side interfaces.

Frequently Asked Questions

Q: How many discrete inputs are available on the IS200STCIH2A?
A: The terminal board provides 24 dry contact input channels with configurable field excitation voltages.

Q: Does the IS200STCIH2A support redundant I/O operation?
A: No. The STCIH2A is configured for simplex I/O operation only.

Q: What type of filtering is included for contact input signals?
A: The board includes hardware filtering with a 4 ms delay for input signal stabilization and built-in surge/noise suppression.

Field Installation Guidelines

Mount the IS200STCIH2A using the specified plastic insulator carrier on a DIN rail or cabinet mounting surface. Verify mechanical alignment and connector engagement before applying field excitation power.

Route contact input wiring separately from high-current power conductors to reduce electromagnetic interference. Use shield termination practices according to cabinet grounding standards and avoid creating additional ground loops through field cable shields.

Confirm excitation voltage selection before connecting field devices. Verify polarity, terminal assignments, and PAIC/PDIA I/O pack connections during commissioning.

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