1. General Information

• Manufacturer: Reliance Electric (Rockwell Automation / Baldor‑Reliance)

• Part Number: 0‑51385 (051385)

• Product Type: Interface / Relay Output Board, ImPak Plus Series

• Application: Reliance ImPak Plus DC Variable‑Speed Drives (8C10, 8C20, etc.)

• Function: Isolates and routes drive control signals, relay outputs for interlocks, fault annunciation, and auxiliary devices; provides dry contacts for external circuits

• Status: Obsolete (legacy replacement/repair part)

• Warranty: 12 months (new/reconditioned)

• Similar Models: 0‑51382 series (relay/interface variants for ImPak Plus)

2. Electrical Specifications

• Control Power: 24 VDC ±10% (from 0‑51383 power supply board)

• Relay Contacts: 5 A @ 120 VAC, 3 A @ 240 VAC (resistive load)

• Digital Inputs: 24 VDC logic (enable, run, stop, fault reset)

• Digital Outputs: Relay contacts (fault, run, speed reach, interlock status)

• Isolation: Logic‑to‑relay ≥ 1500 VAC

• Fusing: On‑board 1 A fuse for control circuit protection

3. Physical & Mechanical

• Dimensions (W×H×D): ~254 × 178 × 25 mm (10.0” × 7.0” × 1.0”)

• Weight: ~0.57 kg (1.25 lbs)

• Construction: Glass‑epoxy PCB, conformal coated, gold‑plated edge connectors

• Mounting: Plug‑in into ImPak Plus drive card cage (vertical slot, adjacent to 0‑51383 power supply)

• Connectors: Screw‑terminal block (front edge) for field wiring; edge connector to backplane

4. Environmental Ratings

• Operating Temperature: 0°C to +50°C (32°F to 122°F)

• Storage Temperature: -20°C to +70°C (-4°F to 158°F)

• Humidity: 5%–95% RH (non‑condensing)

• Vibration: 0.15 mm p‑p @ 10–100 Hz

5. Key Features

1. Relay Outputs: 4–6 programmable dry contacts for external alarms/controls

2. Signal Isolation: Opto‑isolated inputs and relay‑isolated outputs to protect drive logic

3. Fault Monitoring: Dedicated fault relay for overcurrent, overspeed, or loss of feedback

4. Compact Design: Single plug‑in board integrates all interface functions

5. Direct Replacement: Pin‑compatible with 0‑51382‑10/‑11/‑12 (no wiring changes)

6. Compatibility

• DC Drives: ImPak Plus (8C10, 8C20, 8C30, all HP ratings)

• Associated Boards:

  • Power Supply: 0‑51383‑1/‑2/‑3

  • Regulator: 0‑51381‑11/‑12/‑13/‑16

  • Gate Drive: 0‑51378‑1/‑2/‑19/‑25

• Replacement: Direct swap with 0‑51382 series (same form/fit/function)

7. Installation & Maintenance

Installation

1. Disconnect all drive power (main AC and control power).

2. Align board with card cage guides; insert firmly into edge connector.

3. Secure with mounting screws (if provided).

4. Wire field devices to front‑edge screw terminals (observe polarity for 24 VDC inputs).

Maintenance

• Cleaning: Use dry, lint‑free cloth; avoid liquid cleaners.

• Inspection: Quarterly check for burnt relay contacts, loose wiring, or corroded terminals.

• Handling: Hold by edges; avoid touching connector pins or exposed circuitry.

8. Troubleshooting

• No Relay Operation: Check 24 VDC power; verify on‑board fuse; test input signals.

• Intermittent Contacts: Inspect relay contacts for burning/pitting; replace board if damaged.

• Fault Relay Stuck: Reset drive; check for persistent drive faults (overcurrent, etc.).

• Input Signal Not Recognized: Verify 24 VDC input voltage; check wiring for opens/shorts.