Model Definition

• 0-55325-1: Full part number (Base Driver Board)

• Alternative IDs: 0553251, O-55325-1

• Status: Discontinued by manufacturer; no direct OEM replacement

• Cross-Reference: No fully compatible equivalent; exact part match required

• Family Note: Belongs to the 0-55325-x series (e.g., 0-55325-21=Voltage Regulator, 0-55325-43=Snubber Board).

Technical Specifications

• Form Factor: Standard 3U PCB (≈248 × 171 mm)

• Weight: ~0.6 kg

• Logic Supply: ±15 VDC, +5 VDC (from system power supply)

• Power Stage Supply: 230/460 VAC, 50/60 Hz

• Output Drive: 0–10 VDC / 20 mA (to power devices)

• Protection: Overcurrent, short-circuit, thermal, and gate drive protection

• Operating Temp: 0 °C to +55 °C

• Mounting: 3U rack slot, goldfinger edge connector to drive backplane

Interfaces & Communication

• Backplane: 3U edge connector (control signals & power)

• Power Devices: Screw terminals / direct soldering to SCR/IGBT gates

• Control Links: Flat-cable connectors to regulator/control boards

• No Network Ports: Hardwired drive interface; no serial/Ethernet

Key Features

1. Power Stage Driver: Amplifies low-level control signals to drive power semiconductors

2. Gate Signal Conditioning: Optimizes gate pulses for SCR/IGBT switching

3. Fault Monitoring: On-board sensing for overcurrent/short-circuit conditions

4. Diagnostic LEDs: Power, Drive, and Fault status indicators

5. 3U Rack Design: Interchangeable in VVI/GV3000 control racks

Application

• Drive Systems: Reliance VVI (50–150 HP), GV3000 series AC drives

• Subassemblies: Power control cabinets, drive mainframes, power interface racks

• Industries: Conveyors, pumps, fans, machine tools, material handling

• Function: Critical interface between control logic and power stage

Compatibility

• Compatible Drives: VVI-50/75/100/150, GV3000 (230/460 VAC)

• Rack Compatibility: Standard 3U VVI/GV3000 drive rack

• Series Compatibility: Works with other 0-55325-x series boards (e.g., 0-55325-21, 0-55325-43)

Critical Notes

• Function Distinction: Different from 0-55307 (VVI power supply) and 0-55325-21 (voltage regulator); this is a base driver board.

• Replacement Challenge: No direct substitute; refurbished 0-55325-1 units are standard solution

• Availability: Limited stock; longer lead times; pricing varies by condition