GE IS200EROCH1ABB | EX2100 EROC Exciter Regulator Options Card Mark VI Speedtronic

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GE IS200EROCH1ABB | EX2100 EROC Exciter Regulator Options Card Mark VI Speedtronic

IS200EROCH1ABB is the EROC (Exciter Regulator Options Card), single‑slot VME printed‑circuit board manufactured by General Electric for GE Speedtronic Mark VI and EX2100 static excitation control systems. This auxiliary regulator option board delivers multiple critical supporting functions for EX2100 racks: it supplies 70 VDC wetting power for ECTB contact terminal board, hosts ISBus inter‑controller communication ports, provides front‑panel keypad / RS‑232 tool port for local cabinet‑side operation, and interfaces with external ground‑fault detection hardware such as IS200ERGTH1A field ground detect module.

It supports both simplex and redundant M1/M2 EX2100 architectures, mounts into ERBP simplex backplane or ERRB redundant backplane slots. Operators can perform local parameter checking, alarm acknowledgement and diagnostic access directly via EROC front‑panel connectors without relying on remote HMI workstation. Power‑plant MRO teams procure IS200EROCH1ABB for planned outage overhaul, local‑interface failure repair, EX2100 cabinet retrofits and critical spare‑part stocking. Original OEM production is discontinued; worldwide supply consists of new‑old‑stock surplus and fully refurbished bench‑tested units.

Key Features

• Single‑slot VME form‑factor, directly plugs into ERBP (simplex) or ERRB (redundant) backplane slots, no external adapter required
• Generates regulated 70 VDC wetting power supply for ECTB Exciter Contact Terminal Board, ensures reliable dry‑contact signal acquisition for breaker and protective‑relay status inputs (52G,86G), avoids ghost contact alarms
• Front‑panel ISBus dual ports for high‑speed proprietary inter‑controller communication between M1/M2 redundant regulator nodes
• Front‑mounted D‑sub tool / keypad RS‑232 port, enables local on‑site diagnostics, parameter viewing and alarm reset at excitation cabinet door
• Dedicated interface for external field ground‑detect hardware IS200ERGTH1A, expands ground‑leakage monitoring capability for generator rotor circuits
• On‑board status LED for power‑good visual indication; dual backplane connectors for dual‑path data transmission within regulator rack
• Conformal‑coated SMD PCB assembly with surge‑suppression and EMI filtering, stable performance in high‑noise power‑plant cabinet environments
• Transports status and diagnostic data over backplane bus to Mark VI main controller and HMI alarm list
• Compatible with simplex and dual‑redundant EX2100 regulator configurations; supports fast card swap‑out during unit shutdown windows
• ESD‑sensitive assembly; anti‑static handling procedures are mandatory for installation and servicing

Technical Specifications

• Part Number：IS200EROCH1ABB
• Manufacturer：General Electric (GE)
• Product Type：Exciter Regulator Options Card (EROC)
• Compatible System：GE Speedtronic Mark VI, EX2100 Excitation Control System
• Core Function：70 VDC wetting power for ECTB, ISBus inter‑controller communication, local RS‑232 keypad/tool interface, external ground‑detect module interface
• Mounting：Single‑slot VME on ERBP (simplex) / ERRB (redundant) backplane inside EX2100 regulator cabinet
• Power Supply：Driven via backplane from EPSM power‑supply modules
• Front‑panel Interfaces：2 × ISBus ports, 1 × RS‑232 D‑Sub tool/keypad connector, power status LED
• Operating Temperature：‑20 °C ~ +60 °C
• Storage Temperature：‑40 °C ~ +85 °C
• Humidity：5‑95 % non‑condensing
• Protection Class：IP20 (cabinet‑mount installation only)
• Interfaces：VME backplane connectors, ribbon‑cable output to ECTB terminal board, signal interface for IS200ERGTH1A ground‑detect module
• Status：OEM discontinued, available as NOS surplus & professionally refurbished tested units
• Handling Requirement：ESD‑sensitive component, ESD protective measures required

Typical Applications

1. Combined‑cycle power plant EX2100 excitation cabinet EROC option‑card replacement for local operator interface failure
2. Gas‑turbine Mark VI excitation subsystem maintenance and spare‑part swap during scheduled unit outages
3. Steam‑turbine generator EX2100 rack repair for faults related to loss of 70 VDC contact‑wetting supply, ISBus communication drop‑out or keypad‑port inoperability
4. Legacy EX2100 system retrofits requiring external rotor ground‑detect module IS200ERGTH1A integration
5. Spare‑part inventory stocking for both simplex and dual‑redundant EX2100 regulator installations

Compatibility Notes

IS200EROCH1ABB is a specific hardware revision variant within the EROC family. Before replacement, verify ERBP/ERRB backplane revision, ECTB board revision, EX2100 system firmware version and original project BOM. This board must work cooperatively with ECTB terminal board and (optionally) IS200ERGTH1A ground‑detect module and cannot operate standalone. Do not mix different EROC suffix revisions without engineering cross‑check; IS200EROCH1ABB is not guaranteed direct drop‑in compatible with older IS200EROCH1A base versions. Related EX2100 series boards include IS200ERDDH1ABA, IS200EPSMG1AED, IS200ECTBG1ADE. Full part‑number suffix matching is strongly recommended to avoid hardware mismatch.

Product Condition & Supply Information

Original GE OEM production for IS200EROCH1ABB has been discontinued. Available inventory consists of new‑old‑stock surplus and professionally refurbished assemblies. Every unit shall complete comprehensive bench validation before shipment, including 70 VDC output load test, ISBus communication verification, RS‑232 tool‑port functional test, backplane signal integrity check and power‑LED indicator validation.

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