1. General Information

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

• Part Number: 0-51805-5 (also 0518055)

• Product Type: Pulse Input Amplifier Board

• Application: Reliance legacy drive systems (FlexPak 3000, GV3000, AutoMax DCS)

• Function: Conditions, amplifies, and isolates pulse/tachometer/encoder signals for speed/position feedback in DC/AC drives

• Status: Obsolete (discontinued); available as new old stock, used, refurbished

• Warranty: 12 months (refurbished / new old stock)

2. Electrical Specifications

• Power Supply: +5 VDC (logic), ±15 VDC (analog)

• Power Consumption: ~4–7 W

• Input Signal: Pulse / tachometer / encoder (0–10 VDC, 4–20 mA, or digital pulse trains)

• Input Frequency Range: 0 Hz to 100 kHz

• Gain Adjustment: Onboard potentiometers for signal scaling

• Isolation: 1000 VDC (field-to-logic)

• Protection: Overvoltage, surge, reverse polarity, ESD

• Output: Amplified, isolated pulse signal to drive control logic

3. Physical & Mechanical

• Dimensions (W × H × D): Standard Reliance card (~220 × 150 mm)

• Weight: Approx. 0.7–0.9 kg

• Form Factor: Rack-mount PCB for Reliance 19” drive racks

• Connectors: Edge connector (backplane), screw terminals (field signals)

• Construction: Industrial FR4 PCB, conformal coated (moisture/dust resistance)

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 (control cabinet rated)

5. Compatibility

• Drive Systems: FlexPak 3000 DC drives, GV3000 AC drives, AutoMax DCS 5000

• Related Boards: 0-51772-3R (drive control), 0-51668-1 (process interface)

• Replacement: Direct replacement for earlier revisions of 0-51805 series

6. Installation & Notes

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

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

3. Wiring: Connect pulse/tach/encoder inputs to designated screw terminals.

4. Adjustment: Set onboard potentiometers for proper gain/scaling of feedback signals.

5. Verification: Confirm ±15 VDC and +5 VDC at backplane; check signal integrity post power-up.