The GE IS200EXHSG3AEC Exciter HS (High-Speed) Relay Driver Board serves as a critical interface
between GE’s EX2100 excitation control system and high-power field relays, enabling fast, precise
activation of critical protective and control devices in generator excitation circuits. Its core function is
to amplify low-voltage control signals from the EX2100’s main controller (e.g., IS200DSPX) into high-
current outputs capable of driving heavy-duty relays—such as field breakers, de-excitation contactors,
and bypass relays—while ensuring ultra-low latency for time-sensitive operations. The board
processes digital control commands (24V DC logic signals) and converts them into robust relay-drive
signals (up to 5A), with built-in overcurrent and short-circuit protection to prevent damage from relay
coil faults. It also monitors relay status (e.g., “pull-in” confirmation, coil integrity) via feedback
circuits, transmitting real-time diagnostic data (e.g., open coil, overcurrent) to the EX2100 HMI via the
EISB (Exciter Internal Serial Bus) for proactive maintenance. Designed for high-reliability applications,
it features galvanic isolation (2.5kV AC) between control logic and power circuits to eliminate EMI/RFI
interference, an IPC-CC-830B Class 3 conformal coating for resistance to dust, moisture, and oil, and a
rugged 3U Eurocard form factor for seamless integration into EX2100 racks. The board supports hot-
swapping in redundant configurations, ensuring uninterrupted excitation system operation during
maintenance or module replacement.
Technical Specifications
| Parameter Category | Details |
| Core Function | Amplifies low-voltage control signals to drive high-power field relays; monitors relay status; provides diagnostic feedback for EX2100 excitation systems. |
| Mechanical Specifications | - Form Factor: Single-slot 3U Eurocard (compatible with EX2100 standard 19-inch racks) - Dimensions: 100mm (W) × 150mm (H) × 28mm (D) - Material: FR4 PCB with IPC-CC-830B Class 3 conformal coating; stainless steel terminal blocks - Mounting: Screw-fixed to EX2100 rack (torque requirement: 2.5 Nm) |
| Input Signals | - Control Inputs: 8 discrete digital channels (24V DC sinking, from EX2100 controller) - Feedback Inputs: 8 discrete status channels (24V DC, for relay “closed” confirmation) - Input Impedance: 1kΩ (control inputs); 500Ω (feedback inputs) |
| Output Capabilities | - Relay Drive Outputs: 8 channels (max 5A per channel, 24V DC) - Output Protection: Overcurrent protection (6A trip threshold, resettable); short-circuit protection (crowbar circuit) - Output Rise Time: <1ms (critical for high-speed de-excitation) |
| Isolation Performance | - Control-to-Power Isolation: 2.5kV AC (prevents EMI/RFI interference) - Channel-to-Channel Isolation: 1kV AC (avoids cross-talk between relay circuits) |
| Communication Interface | - Protocol: GE EISB (Exciter Internal Serial Bus) - Data Rate: 10 Mbps (full-duplex) - Transmitted Data: Relay status, overcurrent faults, short-circuit events, module health |
| Power Requirements | - Supply Voltage: 24V DC ±10% (from EX2100 backplane) - Power Consumption: <12W (typical, 4 relays active); <20W (max, 8 relays active) |
| 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 acceleration, 10–500Hz) - Shock Resistance: IEC 60068-2-27 (50g peak, 11ms duration) |
| Safety & Compliance | - Certifications: UL 61010-1 (industrial safety), IEC 61800-5-1 (motor drive compatibility), CE - Thermal Protection: Built-in temperature sensor (shuts down outputs at 85°C, auto-recovers at 70°C) |
| Indicators & Diagnostics | - LEDs: 1 power LED (green, 24V DC present); 8 relay drive LEDs (green, output active); 8 feedback LEDs (yellow, relay confirmed closed); 1 fault LED (red, overcurrent/short-circuit) - Fault Logging: Stores last 10 fault events (accessible via EISB) |
| Compatibility | - System: Exclusive to GE EX2100 excitation control system - Compatible Relays: GE 12DVC series (field breakers), 15DVC series (de-excitation contactors) - Supporting Modules: IS200DSPX (controller), IS200ESELH2AAA (selector board), IS200ERBPG1A (backplane) |
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