The GE IS200EROCH1ABB Exciter Regulator Options Card Module serves as a flexible, feature-
expansion interface for GE's EX2100 excitation control system, enabling customization of control
algorithms, protection logic, and communication capabilities without altering the core DSPX
controller. It processes and conditions critical analog and discrete signals (e.g., PT/CT inputs, breaker
status, field voltage/current feedback) with high-precision filtering and galvanic isolation (typically 2.5
kV AC), ensuring noise immunity in high-EMI generator environments. The module implements
application-specific protection and control functions such as overexcitation/underexcitation limits,
VAR/PF control modes, field current regulation, and breaker interlocks, while supporting
programmable setpoints and logic via the EX2100 configuration tool. It communicates with the DSPX
controller via the EISB (Exciter Internal Serial Bus) for real-time command/feedback exchange and
diagnostics, and interfaces with external systems through configurable analog outputs (±10 V, 4–20
mA) and relay outputs (Form C contacts) for alarms and control actions. Designed as a single-slot 3U
Eurocard with conformal coating (IPC-CC-830B Class 3) and LED status indicators, it facilitates hot-
swap replacement in redundant racks, enhancing system availability for power generation, industrial
motor, and grid-stabilization applications.
Technical Specifications
| Parameter | Details |
| Core Function | Feature-expansion module for EX2100; implements protection, control, and I/O processing |
| Form Factor | Single-slot 3U Eurocard, compatible with EX2100 control racks |
| Analog Inputs | Configurable channels for PT/CT signals, field voltage/current, 4–20 mA sensors |
| Discrete Inputs | Digital status inputs for breaker positions, interlocks, and alarms |
| Analog Outputs | Channels providing ±10 V and/or 4–20 mA control signals |
| Relay Outputs | Form C contacts for control and alarm functions |
| Isolation | Typically 2.5 kV AC channel-to-channel and field-to-logic |
| Surge Protection | MOV-based protection on inputs/outputs |
| Operating Voltage | Powered via EX2100 backplane (typically 24 V DC) |
| Operating Temperature | -40°C to +70°C |
| Communication | EISB bus interface for real-time data exchange with DSPX |
| Indicators | Front-panel LEDs for power, status, and fault indication |
| Environmental | Conformal coating (IPC-CC-830B) for harsh environments |
| Certifications | UL 61010-1, IEC 61800-5-1, CE compliant |
Integration with Mark VIe DCS
The IS200EROCH1ABB is purpose-built for seamless integration into Emerson’s Mark VIe DCS architecture:
Rack Compatibility: Designed for Mark VIe I/O racks (e.g., IS200IOCCH1A, IS200IOCCH2A), mounting directly into the rack’s power supply slot via a backplane connector—no external wiring required for rack power distribution.
Redundancy Support: Can be configured in 1+1 redundant pairs (two IS200EROCH1ABB modules per rack) to eliminate single points of failure. The modules automatically load-balance and switchover if one unit faults, ensuring uninterrupted power.
Status Monitoring: Features LED indicators for "Power OK" (green), "Fault" (red), and "Redundancy Active" (amber) to provide local visual status. Fault signals are also transmitted to the Mark VIe controller for remote monitoring and alerting via the DCS HMI.
Hot-Swappable (Optional): Select variants support hot-swapping (replacing the module while the rack is powered) to minimize downtime during maintenance—critical for continuous-process industries.
Application Scenarios
The IS200EROCH1ABB is primarily used in:
Power Generation: Turbine control systems (gas, steam, hydro), boiler control, and auxiliary systems (e.g., feedwater pumps) in power plants.
Oil & Gas: Upstream (wellhead control), midstream (pipeline monitoring), and downstream (refinery process control) applications.
Heavy Industry: Metal processing, cement manufacturing, and pulp/paper mills—where reliable I/O power is essential for process stability.
Marine & Offshore: Shipboard control systems (e.g., propulsion, navigation) and offshore platform automation (certified variants for harsh marine environments).
Maintenance & Handling
No User-Serviceable Parts: Internal components are sealed and not field-serviceable. Faulty modules require replacement (not repair) to maintain safety and performance.
Periodic Inspection: Recommended to check LED status, input/output voltage (via DCS diagnostics), and physical condition (e.g., loose connectors, dust buildup) quarterly.
Replacement Guidelines: When replacing, ensure the new module matches the exact part number (IS200EROCH1ABB) and firmware version to maintain compatibility with the Mark VIe rack and controller.
Lifecycle: Designed for a Mean Time Between Failures (MTBF) of ≥100,000 hours under nominal operating conditions, aligning with the long service life of Mark VIe DCS components.
Documentation & Support
Key Manuals: Refer to Emerson’s Mark VIe System Hardware Installation Guide (Document No. GEH-6721) and IS200EROCH1ABB Power Supply Datasheet for wiring diagrams, redundancy setup, and troubleshooting steps.
Support: Available through Emerson’s global service network, including technical hotlines, on-site maintenance, and firmware updates. Spare parts are stocked globally to minimize lead times for replacements.
This power supply module is a foundational component of the Mark VIe DCS, ensuring reliable power delivery to I/O hardware and enabling safe, efficient operation of critical industrial processes.
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