1. General Information

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

• Part Number: 0-51811-3 (0518113)

• Product Type: Voltage Tester Card / Diagnostic Module

• Application: Legacy Reliance drive systems (MaxPak Plus, VS Spindle, FlexPak 3000, GV3000)

• Function: Precision in‑system voltage measurement, signal troubleshooting, calibration, and drive circuit validation

• Status: Obsolete (discontinued); available as used / refurbished / new old stock

• Warranty: 12 months (tested/refurbished units)

2. Electrical Specifications

• Power Supply: +5 VDC, ±15 VDC (from drive backplane)

• Measurement Ranges: AC/DC voltage, 0–600 VDC, 0–480 VAC

• Input Impedance: >1 MΩ (high impedance, no circuit loading)

• Accuracy: ±0.5% full scale

• Isolation: 1000 VDC (test points to logic)

• Front‑Panel Controls:

  • Large analog voltmeter (main display)

  • 12‑position rotary switch (test point selection: 1–12)

  • Scale toggle switch: SCALE + / TEST –

  • Test signal potentiometer: TEST SIGNAL (0–10)

• Protection: Overvoltage, transient, ESD, reverse polarity

3. Physical & Mechanical

• Form Factor: Standard Reliance rack‑mount module

• Dimensions (W×H×D): ~220 × 150 mm

• Weight: ~0.8–1.0 kg

• Front Panel: Analog meter, rotary switches, pots, test jacks

• Connectors: Edge connector (backplane), front‑panel test ports

• Construction: Industrial FR4 PCB, conformal coated; includes transformer, ICs, resistors, capacitors, diodes

4. Environmental Ratings

• Operating Temperature: 0°C to +60°C

• Storage Temperature: -20°C to +70°C

• Humidity: 5%–95% RH, non‑condensing

• Vibration: 10–150 Hz, 0.1 mm amplitude (cabinet rated)

5. Compatibility

• Drive Systems: MaxPak Plus, VS Spindle Drives, FlexPak 3000, GV3000, AutoMax DCS

• Related Modules: 0-51811-1 (older revision), 0-51805-5 (pulse input), 0-51772-3R (control board)

• Replacement: Direct upgrade/replacement for 0-51811-1; improved accuracy and switching

6. Installation & Operation

1. Power Off: Disconnect all drive power before insertion/removal.

2. Rack Slot: Insert into dedicated drive rack slot; secure with retainers.

3. Backplane Power: Confirm +5 VDC and ±15 VDC at backplane connectors.

4. Test Point Selection: Use 12‑position switch to select drive signals (DC bus, control voltages, sensor inputs, I/O).

5. Scale Adjustment: Use SCALE + / TEST – toggle to match signal polarity/range.

6. Test Signal Generation: Adjust TEST SIGNAL pot to inject known voltage for calibration.

7. Meter Reading: Read AC/DC voltage directly from front‑panel analog meter.

7. Common Uses

• Measure DC bus voltage (0–600 VDC)

• Verify control circuit voltages (±15 VDC, +5 VDC)

• Check tachometer/encoder signal levels

• Troubleshoot I/O and sensor circuits

• Calibrate drive feedback loops