Application Scenarios
In a large-scale water treatment facility, the maintenance team encountered a recurring issue with their high-horsepower 1336 series drives: contactor failure during drive startup. The root cause was traced to uncontrolled inrush current charging the DC bus capacitors, which placed excessive stress on the contactor contacts with each power-up cycle. Replacing the faulty 1336-PB-SP23C precharge board restored the controlled charging sequence, and the contactor failures ceased immediately. The 1336-PB-SP23C now manages the critical precharge cycle for the facility’s 250 HP pump drives, ensuring that DC bus voltage rises gradually and safely before the main contactor engages, extending the service life of both the contactor and the drive’s power components.
Parameter
| Parameter | Value/Description |
|---|---|
| Product Model | 1336-PB-SP23C |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Category | Precharge PC Board |
| Product Line | 1336 PCB Boards |
| Drive Compatibility | PLUS, PLUS II, FORCE, IMPACT & REGEN Drives |
| Drive Voltage | 460 V AC |
| Horsepower Rating | 60 to 600 HP |
| Operating Temperature | 0°C to 50°C |
| Storage Temperature | -40°C to 85°C |
| Relative Humidity | 5% to 95% (non-condensing) |
| Installation Altitude | 1000 m maximum |
| Weight | 0.3 kg (0.69 lb) |
| Dimensions | 24.3 × 12.6 × 2.8 cm |
| Product Lifecycle | Discontinued/Obsolete by Manufacturer |
| Country of Origin | USA |
