GE IS200ERIOH1A IS200ERIOH1ACB | I/O Regulator Board

Core Function and System Role

The GE IS200ERIOH1A provides regulated power for Mark VI I/O modules. Specifically, this board converts 24 Vdc input into multiple stable output voltages. Moreover, it supplies 5 Vdc and ±15 Vdc to analog and digital circuits. The IS200ERIOH1ACB variant includes enhanced filtering for low-noise analog applications.

Technical Specifications Overview

This I/O regulator board features one main input and eight regulated outputs. Each output channel provides precise voltage with low ripple. Furthermore, the board achieves 85% efficiency at full load.

Parameter	Specification
Part Number	IS200ERIOH1A / IS200ERIOH1ACB
Type	I/O Regulator Board / Power Conditioning Module
Main Input	1 Channel, 24 Vdc ±20%
Output 1 (5V)	5 Vdc ±3%, 3 A
Output 2 (+15V)	+15 Vdc ±3%, 1 A
Output 3 (-15V)	-15 Vdc ±3%, 1 A
Auxiliary Outputs	5 Channels, 24 Vdc Pass-through
Output Ripple	<10 mVpp on 5V, <20 mVpp on ±15V
Efficiency	>85% at Full Load
Line Regulation	±0.1% for 5V Output
Load Regulation	±0.5% for 5V Output
Connector Types	1 x Terminal Block (Input), 2 x 50-pin D-sub (Outputs)
Dimensions (W x H x D)	175 x 105 x 28 mm
Weight	0.55 kg
Onboard Energy Storage	6 x 470 µF, 35V Capacitors

Connector Layout and Component Count

The board uses one terminal block for 24 Vdc input connection. For instance, terminals TB1-1 and TB1-2 accept DC power from the system supply. Meanwhile, two 50-pin D-sub connectors distribute regulated outputs to I/O modules. The IS200ERIOH1ACB adds six additional filter capacitors for noise reduction.

Energy Storage and Output Stability

This regulator board includes local capacitance for transient response. Specifically, six 470 µF capacitors filter each output rail. Therefore, the board maintains stable voltages during sudden load changes. Additionally, onboard LED indicators show each output status. For example, green LEDs confirm proper 5V, +15V, and -15V rails. A red LED warns you of input undervoltage or overload conditions.

Diagnostic Features and Fault Protection

The board continuously monitors each output for overcurrent conditions. Consequently, it shuts down the affected rail within 10 milliseconds. Moreover, the GE IS200ERIOH1A IS200ERIOH1ACB includes thermal shutdown for overheating protection. This feature prevents damage from blocked cooling or excessive loads. An onboard status relay reports any fault to the main controller.

Maintenance and Hot Replacement

You can replace this regulator 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 I/O power conditioning.

Industrial Applications

This I/O regulator board works inside GE Mark VI control cabinets. For reliable GE power conditioning, the IS200ERIOH1A and IS200ERIOH1ACB deliver exceptional performance. They provide clean regulated power for steam and gas turbine I/O modules.