Product Description

The GE IS200WROBH1A is a high-reliability relay power sensing board designed for demanding turbine and industrial control environments. It forms part of the proven Mark VI control architecture, and it delivers consistent relay output performance for safety-critical circuits. Engineers value this board because it supports high-density outputs while offering integrated fuse protection and voltage sensing across multiple power ranges.

The board handles a mix of DC and AC feedback inputs, allowing operators to verify circuit health without relying on external meters. Moreover, its compatibility with TRLY relay modules and TDBTH-series terminal boards simplifies field installation. Many facilities deploy the WROB board in simplex or redundant configurations, while TMR systems rely on its fault-tolerant design to maintain operation during component failures.

In addition, its robust isolation barriers help protect downstream equipment from electrical noise, which is common in large turbine installations. This combination of fused outputs, sensing capability, and broad voltage support makes the IS200WROBH1A an essential component for reliable turbine protection.

Technical Specifications

Model: IS200WROBH1A / IS200WROBH1ABA
Acronym: WROB
Type: Relay Output Board / Fuse & Voltage Sense Distribution
System Compatibility: GE Mark VI / Mark VIe controls

Electrical Parameters

• Fuse Rating: 3.15 A (default)

• Voltage Feedback: 24 VDC, 48 VDC, 125 VDC; 120 VAC and 240 VAC

• Relay Compatibility: TRLY relay family

System Architecture

• Terminal Board Support: TDBTH2, TDBTH4, TDBTH6

• Redundancy: Simplex, Redundant, and TMR

• Isolation: Galvanic isolation for all outputs

Environmental Conditions

• Operating Temperature: –40 °C to +70 °C

• Storage Temperature: –40 °C to +85 °C

Mechanical & Certification

• Mounting: Panel or rack installation

• Certifications: UL, CE, CSA

FAQ

Q1: What voltage ranges can the IS200WROBH1A monitor?
It supports common industrial ranges such as 24 VDC, 48 VDC, 125 VDC, and both 120 VAC and 240 VAC.

Q2: Does this board support TMR turbine systems?
Yes, the WROB board integrates smoothly into TMR configurations using TDBTH2, TDBTH4, or TDBTH6 terminal boards.

Q3: What relay modules work with this board?
It is compatible with the TRLY relay series used throughout GE’s Mark VI control environment.

Q4: Are the fuses replaceable in the field?
Yes, the 3.15 A fuses can be replaced on-site during routine maintenance.

Q5: Can this module operate in harsh environments?
It operates reliably from –40 °C to +70 °C and includes galvanic isolation for noise immunity.