1. General Information

• Part Number: 0-49020-2 (also 0490202)

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

• Product Type: CardPak Plug‑In Speed / Voltage Reference Card

• Series: 0-49020‑xx (reference & setpoint modules for DC drives)

• Application: FlexPak / MinPak DC drives, CardPak racks; precision speed reference, setpoint, and voltage calibration

• Status: Obsolete / Discontinued (legacy; available used/refurbished)

2. Electrical Specifications

• Control Power: +24 VDC ±10% (CardPak bus)

• Reference Output: 0–10 VDC precision analog (speed/setpoint reference)

• Output Accuracy: ±0.1% full scale (calibrated)

• Temperature Drift: ±50 ppm/°C

• Adjustments: Onboard multi‑turn pots for Fine Cal, Zero, Span, Range

• Isolation: Input‑to‑output galvanic isolation

• Protection: Overvoltage, reverse polarity, ESD, transient suppression

3. Mechanical & Physical

• Form Factor: Standard CardPak plug‑in module (edge connector)

• Dimensions (W×H×D): 4 in × 6 in × 2 in (102×152×51 mm)

• Weight: ~1.5 lbs (0.68 kg)

• Connector: Gold‑plated edge connector (CardPak standard)

• PCB: Conformal coated (moisture/dust/corrosion resistance)

• Enclosure: Industrial black metal, EMI/RFI shielding

4. Environmental Ratings

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: −40 °C to +70 °C

• Humidity: 5%–95% RH, non‑condensing

• Vibration: 1 g (10–100 Hz), industrial grade

• Shock: 10 g, 11 ms duration

5. Key Features

1. Precision speed reference: Stable 0–10 VDC setpoint for closed‑loop speed control.

2. Multi‑turn calibration pots: High‑resolution zero/span adjustment for field trimming.

3. Isolated output: Reduces ground loops and noise in heavy industrial environments.

4. Drop‑in compatible: Fits all CardPak racks; direct replacement for other 0-49020‑xx cards.

5. 24/7 industrial duty: Designed for FlexPak/MinPak DC drive systems.

6. Compatibility

• Racks: All Reliance CardPak series racks

• Drives: FlexPak DC, MinPak DC, legacy Reliance DC drives

• Related Modules:

  • 0-49017‑xx: Summing cards (signal mixing)

  • 0-49013‑4: Speed feedback card

  • 0-49009‑3: Regulator/driver card

7. Differences in 0-49020 Series

• 0-49020-2: Standard precision 0–10 V speed reference (most common)

• 0-49020-1: Low‑range / limited span version

• 0-49020-3: High‑temperature / extended range version