GE IS200EXHSG3A IS200EXHSG3AEC | H/S Terminal Board

Core Function and System Role

The GE IS200EXHSG3A provides high-speed I/O termination for Mark VI systems. Specifically, this board interfaces field devices with the main controller. Moreover, it handles both input sensing and output driving functions. The IS200EXHSG3AEC variant includes conformal coating for moisture-prone environments.

Technical Specifications Overview

This terminal board features sixteen 24 Vdc input channels for field sensors. Each input includes optical isolation for noise immunity. Furthermore, the board provides eight relay outputs for actuator control.

Parameter	Specification
Part Number	IS200EXHSG3A / IS200EXHSG3AEC
Type	H/S Terminal Board / High-Speed I/O Interface
Digital Inputs	16 Channels, 24 Vdc
Input Isolation	2500 Vrms Optocouplers
Input Response	<1 ms
Relay Outputs	8 Channels, Form C (SPDT)
Output Voltage	125 Vdc Maximum
Output Current	2 A per Channel (Resistive)
Output Response	<5 ms
Logic Power	24 Vdc ±15%
Connector Types	2 x 50-pin D-sub, 3 x Terminal Blocks
Dimensions (W x H x D)	200 x 115 x 30 mm
Weight	0.58 kg
Onboard Energy Storage	4 x 220 µF, 35V Capacitors

Connector Layout and Component Count

The board uses two 50-pin D-sub connectors for controller interface. For instance, connector J1 carries input status signals to the processor. Meanwhile, connector J2 receives output command data from the controller. Three terminal blocks handle all field wiring connections. The IS200EXHSG3AEC adds a thick conformal coating over all components.

Energy Storage and Signal Integrity

This terminal board includes local capacitance for stable logic operation. Specifically, four 220 µF capacitors filter the 24 Vdc supply. Therefore, the board maintains reliable performance during transient loads. Additionally, onboard LED indicators show power and channel status. For example, green LEDs confirm active digital inputs. Yellow LEDs illuminate when relay outputs energize.

Diagnostic Features and Fault Detection

The board continuously monitors input channels for signal transitions. Consequently, it captures state changes with 1 ms resolution. Moreover, the GE IS200EXHSG3A IS200EXHSG3AEC includes output readback for relay verification. This feature confirms that mechanical contacts actually change state. An onboard status register reports all channel health to the main controller.

Maintenance and Hot Replacement

You can replace this terminal board without powering down the turbine cabinet. Thus, mean time to repair remains under ten minutes. The board stores no configuration data locally. Therefore, you simply install the replacement and resume normal operation.

Industrial Applications

This H/S terminal board works inside GE Mark VI control panels. For reliable GE high-speed I/O interfacing, the IS200EXHSG3A and IS200EXHSG3AEC deliver exceptional performance. They provide fast and accurate signal termination for steam and gas turbine systems.