• Manufacturer: Reliance Electric (Rockwell Automation)

• Part Number: 0-49040-2 (alternate: 0490402)

• Type: Phase-Controlled Full-Wave Rectifier Module

• Series: CardPak (legacy DC drive system)

• Application: DC motor armature power supply, industrial DC speed regulation

• Status: Obsolete / Discontinued (spare parts only)

Electrical Specifications

• Input: 3-phase AC, matched to Reliance drive power section

• Output: Adjustable full-wave rectified DC (armature voltage)

• Control Method: Phase-angle firing (SCR regulation)

• Control Power: 5 VDC / 15 VDC logic bus

• Regulation Range: 0–rated DC voltage (motor armature)

• Feedback: Current loop & voltage loop feedback compatible

• Protection: Overcurrent, thermal shutdown, short-circuit protection

• Interface: Standard CardPak edge connector (bus & power)

Mechanical & Environmental

• Mounting: CardPak slot-mount (slide-in, front-panel screw secure)

• Dimensions (L×W×H): 305 × 254 × 203 mm (12 × 10 × 8 in)

• Weight: Approx. 1.8 kg (4.0 lbs)

• Casing: Black industrial plastic, front label “RECTIFIER 0-49040-2”

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

• Storage Temp: -20°C to 60°C (-4°F to 140°F)

• Humidity: 5%–95% non-condensing

• Vibration: Industrial cabinet vibration compliant

Features

• Precision Control: Smooth phase-angle regulation for DC armature voltage

• Compact Integration: Standard CardPak form factor for direct replacement

• Front Adjustment: Potentiometer for max voltage / current limit calibration

• Status Indication: LED for power ON and fault (overcurrent/thermal)

• Isolation: Galvanic isolation between AC input and DC output

• Compatibility: Works with Reliance MinPak, GV3000, and CardPak-based DC drives

Installation & Adjustment

Installation

1. De-energize the entire drive system.

2. Insert 0-49040-2 into the designated CardPak slot.

3. Tighten front-panel mounting screws.

4. Verify bus connectors are fully seated; check AC input and DC output wiring.

Adjustment (No-Load)

1. Power on drive with motor disconnected.

2. Adjust front potentiometer to set maximum armature DC voltage.

3. Reconnect motor; calibrate current limit per drive manual.

4. Test light-load operation for smooth speed and no tripping.

Operation & Faults

• Normal: Converts 3-phase AC to regulated DC; Power LED ON.

• Overcurrent: Fault LED ON; output shuts down (reset after clearing fault).

• Thermal Trip: Fault LED ON; module overheated (cool before restart).

• Stop: Cuts DC output; motor coasts or brakes per drive config.

Compatibility & Maintenance

• Compatible Modules: 0-49029-2 (protection), 0-49004 (DC amplifier), other CardPak I/O modules.

• Maintenance: Keep module clean; inspect socket contacts; avoid high-temperature operation.