The GE DS2020UCOCN4G1A manages generator excitation with digital precision. This module communicates directly with the main excitation control system. It fits into GE EX2100 and EX2100e series cabinets. You will use this unit for field current regulation and protection coordination.
Technical Specifications Overview
This field exciter module features a 32-bit RISC processor for fast calculations. The module accepts 24 V DC input for its internal logic circuits. The GE DS2020UCOCN4G1A provides eight optically isolated digital inputs for status monitoring. A built-in 12-bit analog-to-digital converter measures field voltage and current. Consequently, you achieve closed-loop control with minimal steady-state error.
| Parameter | Specification |
|---|---|
| Model | DS2020UCOCN4G1A |
| Processor Type | 32-bit RISC @ 40 MHz |
| Digital Inputs | 8 (optically isolated) |
| Digital Outputs | 4 (solid-state relays) |
| Analog Inputs | 4 (0–10 V, 4–20 mA) |
| Analog Outputs | 2 (4–20 mA) |
| ADC Resolution | 12 bits |
| Control Loop Update | 1 ms |
| Isolation Voltage | 1500 V AC (field to logic) |
| Dimensions (H x W x D) | 230 x 160 x 28 mm |
| Weight | 0.65 kg |
| Power Consumption | 7.5 W typical |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -30°C to +85°C |
Internal Components and Energy Storage
The GE DS2020UCOCN4G1A contains one main PCBA with 192 discrete components. Key parts include the central processor, memory chips, and isolation optocouplers. The board also holds two large capacitors storing 2200 µF of energy. This storage maintains processor operation during 10 ms power interruptions. Moreover, a real-time clock chip timestamps all fault events. A separate EEPROM retains configuration parameters without external power.
Physical Interfaces and Connectors
You will find two front-facing 40-pin connectors on this module. These connectors link to the EX2100 backplane for power and field I/O. A separate 9-pin D-sub port supports local programming access. Four green LEDs indicate processor status, communication, and I/O activity. One red LED flashes for any internal self-test failure. Six mounting holes secure the GE DS2020UCOCN4G1A safely to its mounting plate.
Installation and Operational Reliability
Install this field exciter module inside a grounded and filtered cabinet. Maintain 35 mm of clearance above and below for airflow. The module runs a complete diagnostic sequence on every power cycle. Therefore, you confirm all I/O channels function correctly before service. This unit supports continuous operation in high-vibration turbine environments.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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