Basic Information

• Manufacturer: Reliance Electric (Rockwell Automation)

• Part Number: 0-49060-1 (alternate: 0490601)

• Type: Current Summing Control Card

• Series: CardPak (legacy DC drive system)

• Function: Sums multiple current signals for current loop feedback & protection in DC drives

• Status: Obsolete / Discontinued (spare parts only; used/surplus available)

Electrical Specifications

• Inputs: Multiple ±10 VDC analog current signals (from sensors/transducers)

• Output: Summed ±10 VDC signal (to power amp card 0-49042-1)

• Control Power: +5 VDC, ±15 VDC (CardPak bus)

• Accuracy: Summing error < ±0.5% FSR

• Bandwidth: DC to 5 kHz

• Protection: Input overvoltage, output short-circuit, thermal shutdown

• Isolation: Galvanic isolation between I/O and logic ground

Mechanical & Environmental

• Mounting: Standard CardPak slot-mount (slide-in + front-panel screw)

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

• Weight: Approx. 1.4 kg (3.0 lbs)

• 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

Key Features

• High-Precision Summing: Accurate summing of multiple current signals for closed-loop control

• Direct Compatibility: Works with all CardPak chassis & modules

• Front-Panel Calibration: Gain & offset potentiometers for easy adjustment

• Status LEDs: Power, Fault, and Signal activity indicators

• Industrial Durability: Vibration & noise immunity for harsh environments

Compatible Modules

• Directly Paired With: 0-49042-1 (Power Amplifier), 0-49040-2 (Rectifier/Firing), 0-49029-2 (Protection)

• System Wide: All CardPak DC drive control cards

Installation & Adjustment

Installation

1. De-energize the entire drive system.

2. Insert 0-49060-1 into the designated CardPak slot.

3. Tighten front-panel mounting screws.

4. Verify edge connectors are fully seated; check +5 VDC and ±15 VDC power.

No-Load Adjustment

1. Power on drive with motor disconnected.

2. Set all inputs to 0 VDC; adjust Offset pot for 0 VDC output.

3. Apply full-scale current signals; adjust Gain pot for rated output.

4. Reconnect motor; calibrate current loop per drive manual.

5. Test light-load operation for stable response, no oscillation.

Operation & Faults

• Normal: Power LED ON; output follows summed input; stable current loop.

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

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

• No Output: Check power, input wiring, and on-board fuse.