GE IS200STAIH2A IS200STAIH2ABA | Analog I/O Terminal Board

Core Function and System Role

The GE IS200STAIH2A terminates analog signals for Mark VI control systems. Specifically, this board handles both input and output analog functions. Moreover, it provides signal conditioning for field transmitters and actuators. The IS200STAIH2ABA variant includes conformal coating for harsh industrial environments.

Technical Specifications Overview

This analog I/O terminal board features eight analog input channels. Each input accepts ±10 Vdc or 4-20 mA signals. Furthermore, the board provides four analog output channels for actuator control.

Parameter	Specification
Part Number	IS200STAIH2A / IS200STAIH2ABA
Type	Analog I/O Terminal Board / Signal Conditioning
Analog Inputs	8 Channels
Input Range	±10 Vdc or 4-20 mA
Input Resolution	14 Bits (16384 Counts)
Input Accuracy	±0.2% of Full Scale
Analog Outputs	4 Channels
Output Range	±10 Vdc or 4-20 mA
Output Resolution	12 Bits (4096 Counts)
Output Accuracy	±0.5% of Full Scale
Status Indicators	12 Green LEDs
Power Supply	24 Vdc ±15%
Connector Types	2 x 50-pin D-sub, 3 x Terminal Blocks
Dimensions (W x H x D)	210 x 125 x 30 mm
Weight	0.78 kg
Onboard Energy Storage	8 x 100 µF, 35V Capacitors

Connector Layout and Component Count

The board uses three terminal blocks for field wiring connections. For instance, block TB1 handles analog inputs 1 through 4. Meanwhile, block TB2 manages analog inputs 5 through 8. Block TB3 hosts the four analog output channels. Two 50-pin D-sub connectors interface with the controller. The IS200STAIH2ABA adds a thick conformal coating over all components.

Energy Storage and Signal Integrity

This analog I/O board includes local capacitance for stable conversion. Specifically, eight 100 µF capacitors filter the 24 Vdc supply. Therefore, the board provides clean analog readings during power fluctuations. Additionally, onboard LED indicators show each channel’s status. For example, green LEDs illuminate for active inputs and outputs. An off LED indicates an inactive or faulted channel.

Diagnostic Features and Fault Detection

The board continuously checks each input channel for open wires. Consequently, it detects broken sensor connections within 100 milliseconds. Moreover, the GE IS200STAIH2A IS200STAIH2ABA includes output readback for loop verification. This feature confirms that actuators receive the correct command signal. An onboard status register reports all channel health to the main controller.

Maintenance and Hot Replacement

You can replace this analog I/O board without powering down the turbine. 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 analog monitoring.

Industrial Applications

This analog I/O terminal board works inside GE Mark VI control cabinets. For reliable GE analog signal termination, the IS200STAIH2A and IS200STAIH2ABA deliver exceptional performance. They provide robust signal conditioning for steam and gas turbine pressure, flow, and position transmitters.