General Information

• Manufacturer: Reliance Electric (now Rockwell Automation)

• Part Number: 0-51818-2 (also 0518182)

• Product Type: Binary Counter & Conversion Board (BCCB)

• Application: Legacy DC drives — MaxPak, MaxPak Plus, FlexPak 3000, GV3000

• Function: High‑speed pulse counting, binary/BCD conversion, position/velocity feedback processing

• Status: Obsolete / discontinued; available as used, refurbished, NOS

• Compatibility: Pin‑compatible with 0-51818-1 (drop‑in replacement)

Key Differences from 0-51818-1

• Updated component layout and improved shielding for better noise immunity

• Enhanced solder joints and conformal coating for higher reliability in harsh environments

• Same form, fit, and function as 0-51818-1; no wiring or software changes required

Electrical Specifications

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

• Input Signal: 5–24VDC pulse, single‑channel or quadrature (encoder/tachometer)

• Max Count Rate: 100 kHz

• Counter: 16‑bit binary up/down counter

• Outputs: Binary (parallel), BCD, analog 0–10VDC

• Isolation: 2500Vrms (input‑to‑logic)

• Accuracy: ±0.01% full scale

• Adjustments: Onboard potentiometers for offset and gain calibration

Physical & Mechanical

• Form Factor: Standard rack‑mount plug‑in card

• Dimensions: ~220 mm × 150 mm

• Connections: Gold‑finger backplane connector; screw terminals for field I/O

• Construction: Industrial PCB with conformal coating

Environmental

• Operating Temp: 0°C to +60°C

• Storage Temp: -20°C to +70°C

• Humidity: 5%–95% RH, non‑condensing

Common Applications

• Encoder feedback for speed/position loops

• Pulse counting for motor revolutions, web length, product count

• Signal conversion between digital counters and analog meters/drive regulators

• Works with: 0-51772-3R (main control), 0-51814 series (VFCB), 0-51805-5 (encoder board)