The GE IS200ESELH1AAA Exciter Collector Board serves as the central signal aggregation and
distribution hub for GE’s EX2100 excitation control system, dedicated to consolidating, conditioning,
and routing critical analog and discrete signals between field devices (e.g., current transformers,
voltage transducers, breaker contacts) and core EX2100 modules (e.g., regulators, I/O interfaces,
selector boards). Its primary function is to streamline signal flow: it collects raw field signals—
including generator field current/voltage feedback (from CTs/PTs), breaker status signals
(open/closed), and excitation system interlock signals—and processes them via built-in filtering (to
reduce EMI/RFI noise) and isolation (to prevent ground loops). The board then distributes the
conditioned signals to target EX2100 modules (e.g., sending field current data to the IS200DSPX
regulator for closed-loop control, and breaker status to the IS200ESELH2A selector board for failover
logic). It also supports bidirectional signal exchange: receiving control commands from the regulator
(e.g., field current adjustment) and transmitting them to field actuators (e.g., SCR triggers). Equipped
with real-time diagnostic capabilities, the board monitors signal integrity (e.g., detecting open CT
circuits) and communicates fault data to the EX2100 HMI via the EISB bus, with front-panel LEDs for
quick status verification (e.g., green = normal signal, red = signal loss). Designed with an IPC-CC-830B
Class 3 conformal coating and ruggedized terminal blocks, it operates reliably in harsh industrial
environments (e.g., power plant dust, temperature fluctuations) and fits seamlessly into EX2100 racks
for plug-and-play integration.
Technical Specifications
| Parameter Category | Details |
| Core Function | Aggregates, conditions, and distributes analog/discrete field signals; monitors signal integrity; enables bidirectional communication between field devices and EX2100 core modules. |
| Mechanical Specifications | - Form Factor: Single-slot 3U Eurocard (compatible with EX2100 standard 19-inch racks) - Dimensions: 100mm (W) × 150mm (H) × 30mm (D) - Material: FR4 PCB with IPC-CC-830B Class 3 conformal coating; stainless steel terminal blocks - Mounting: Screw-fixed to EX2100 rack (torque: 2.5 Nm); tool-free terminal access |
| Signal Inputs | - Analog Inputs: 8 channels (for CT/PT signals: 0–5A AC, 0–100V AC; 4–20mA DC for transducers) - Discrete Inputs: 12 channels (24V DC sinking, for breaker status, interlocks) - Filtering: 2nd-order low-pass filters (cutoff frequency: 500Hz) to reduce noise |
| Signal Outputs | - Analog Outputs: 6 channels (0–10V DC, 4–20mA DC) for conditioned feedback to regulators - Discrete Outputs: 8 channels (24V DC sourcing, for control signals to actuators) - Isolation: 2.5kV AC (field inputs to EX2100 logic circuits) |
| Communication Interface | - Protocol: GE EISB (Exciter Internal Serial Bus) - Data Rate: 10 Mbps (full-duplex) - Transmitted Data: Signal status, fault codes (e.g., open CT, overvoltage), diagnostic metrics |
| Power Requirements | - Supply Voltage: 24V DC ±10% (from EX2100 backplane) - Power Consumption: <6W (typical); <9W (max load) |
| Environmental Ratings | - Operating Temperature: -40°C to 70°C (-40°F to 158°F) - Storage Temperature: -55°C to 85°C (-67°F to 185°F) - Relative Humidity: 5%–95% (non-condensing) - Vibration Resistance: IEC 60068-2-6 (5g, 10–500Hz) - Shock Resistance: IEC 60068-2-27 (50g, 11ms) |
| Safety & Compliance | - Certifications: UL 61010-1, IEC 61800-5-1, CE - Protection: Overvoltage protection (36V DC max on inputs); reverse polarity protection (power supply) - Terminal Rating: 10A max per discrete output terminal |
| Indicators & Diagnostics | - LEDs: 1 power LED (green), 8 analog input LEDs (green = valid signal), 12 discrete input LEDs (green = active), 1 EISB communication LED (green = normal) - Fault Detection: Open circuits (CT/PT), signal overrange, power loss |
| Compatibility | - System: Exclusive to GE EX2100 excitation control system - Compatible Modules: IS200DSPX (regulator), IS200ESELH2A (selector board), IS200ERBPG1ACA (I/O interface), IS200EPSMG1AED (power supply) - Backplanes: IS200ERBPG1A/1B (EX2100 standard backplanes) |
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