The GE DS200CPCAG1A, also cataloged as the DS200CPCA Contactor Pilot Board, operates as a dedicated hardware component for contactor coil voltage rectification and driver signaling within GE EX2000 Excitation Control System platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | DS200CPCAG1A |
| Brand | General Electric |
| Origin | USA |
| Series | EX2000 |
| Functional Acronym | CPCA |
| Board Size | 23.8 cm high x 8.6 cm wide |
| Operating Temp | -35 to 65 deg C |
| Weight | 0.45 kg |
| Power Supply Voltage | 25 VDC |
| Input Voltage | 115 VAC (from CDBA board) |
| Output Rectification Voltage | 105 VDC (to contactor coil) |
| Drive Coil Target Rating | 115 V contactors |
| Test Points | CPH (Power Positive Input), CPN (Power Negative Input), PSP (Coil Control Positive Input), PSN (Coil Control Negative Input) |
| Power Consumption | Powered by 25 VDC internal rail and 115 VAC coil feed |
Firmware Flash Compatibility & Backplane Bus Processing
The DS200CPCAG1A interfaces directly with the EX2000 backplane control hierarchy and receives primary control electricity from the CDBA board. It converts the incoming 115 VAC feed into a rectified 105 VDC output level required to actuate and continuously hold 115 V rated contactor coils in a closed state. Because the CPH positive power input test point floats relative to the drive's common potential, test measurements across onboard diagnostic pins (CPH, CPN, PSP, PSN) require isolated test instrumentation designed for floating voltage validation.
Frequently Asked Questions
Q: What instrument precautions must be taken when measuring test points on the DS200CPCAG1A?
A: Measurements across test point CPH must be performed using galvanically isolated test equipment capable of measuring floating potentials, as CPH is not referenced to the drive's common signal level.
Q: How does the DS200CPCAG1A process the coil drive voltage for connected contactors?
A: The board receives a 115 VAC control signal from the CDBA board and rectifies it to 105 VDC, supplying full hold-in voltage directly to the contactor coil.
Q: What supply voltage feeds the internal control circuitry of the DS200CPCAG1A?
A: The board requires a dedicated 25 VDC power supply rail for its internal pilot logic and switching components.
Field Installation Guidelines
- Isolate all 115 VAC coil supply lines and 25 VDC control power before inserting, removing, or wiring the DS200CPCAG1A board.
- Wear a grounded ESD wrist strap attached to the enclosure cabinet metal structure during module installation and maintenance.
- Maintain proper wire routing separate from high-voltage AC lines, ensuring floating signal paths (CPH/CPN) remain isolated from chassis ground.
- Ensure all screw terminals and backplane ribbon header connections are fully seated and secured to prevent intermittent contactor dropouts due to field vibration.
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