Description

IS200WROBH1AAA WROB Relay Output Board

Technical Specifications

• Product Model: IS200WROBH1AAA
• Brand: GE Vernova (Mark VIe Speedtronic series)
• Warranty: One Year
• Input Voltage: Powered via Mark VIe backplane; relay contact rating up to 125 VDC / 240 VAC external field circuits
• Operating Temperature: ‑30 °C ~ +65 °C cabinet‑mount
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: Relay contact actuation typical 10‑15 ms
• Protection Class: IP00 plug‑in rack‑mount PCB; conformal‑coated version available
• Accuracy Class: Electromechanical relay switching; no analog measurement
• Output Frequency: Static discrete relay output only; pulse operation supported by control logic
• Rated Current Range: Each Form‑C relay rated 5 A @120 VAC / 3 A @125 VDC
• Communication Interface: Mark VIe backplane connector; multi‑pin field mating connector for external termination assembly
• Supported Protocols: Works with Mark VIe IONet distributed control system; compatible with simplex, dual and TMR architectures
• Overload Capacity: Contact transient‑suppression components; no channel‑to‑channel galvanic isolation; no onboard over‑current fuses
• Dimensions: Standard Mark VIe I/O board footprint

Product Overview

The IS200WROBH1AAA is a relay‑output board for GE Mark VIe turbine‑generator control systems. It carries multiple Form‑C electromechanical relays to switch external plant circuits for alarm annunciation, auxiliary equipment interlocks, trip‑circuit auxiliary contacts and status indication. The board receives control commands from the paired I/O pack over the rack backplane and drives relay contacts to open/close field‑side discrete circuits.

This board addresses turbine‑control system challenges: reliable hard‑contact discrete switching for plant auxiliary circuits, status feedback for safety‑interlock sequences, and drop‑in spare‑part compatibility for legacy Mark VIe racks. Electromechanical relay outputs provide galvanic separation between Mark VIe low‑voltage control electronics and high‑voltage plant field circuits. Turbomachinery‑control engineers, power‑plant maintenance technicians and retrofit integrators benefit most. It fits standard Mark VIe rack slots and applies to gas‑turbine, steam‑turbine and combined‑cycle power‑generation units for sequence control, alarm triggering and auxiliary interlock functions.

Key Application Notes

• Must pair with Mark VIe corresponding I/O pack; cannot run standalone
• Electromechanical Form‑C relay outputs; user must add external fuses on field wiring side
• Not hot‑swap capable: rack power must be disconnected before board replacement
• Relay contact life is limited; inductive loads require external surge‑suppression devices
• No onboard field‑wiring screw terminals; requires separate external termination hardware
• Conformal‑coated PCB variant available for high‑humidity, high‑contaminant cabinet environments
• Origin USA; common spare for power‑plant turbine‑control maintenance and retrofit projects