Basic Information

• Manufacturer: Reliance Electric (Rockwell Automation)

• Part Number: 0-49061 (alternate: 049061)

• Type: Square Wave Generator Card

• Series: CardPak (legacy DC drive system)

• Function: Generates precision square-wave timing/clock signals for DC drive firing & synchronization

• Status: Obsolete / Discontinued (spare parts only; used/surplus available)

  

Electrical Specifications

• Output: Precision square wave, ±10 VDC (logic-level compatible)

• Frequency Range: 10 Hz – 10 kHz (adjustable via front-panel pot)

• Duty Cycle: 50% ±1% (fixed, symmetrical)

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

• Accuracy: Frequency stability ±0.1% (full range)

• Isolation: I/O isolated from logic ground

• Protection: Overvoltage, short-circuit, thermal shutdown

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

• Precision Timing: Stable square wave for drive firing & phase synchronization

• Front-Panel Adjustment: Frequency pot for on-site calibration

• LED Status Indicators: Power, Run, Fault

• Direct Compatibility: Works with all CardPak chassis & modules

• Industrial Durability: Vibration & noise immunity for harsh environments

Compatible Modules

• Pairs With: 0-49040-2 (Rectifier Firing), 0-49042-1 (Power Amp), 0-49060-1 (Current Summing)

• System Use: CardPak DC drive control systems (e.g., VS Series)

Installation & Adjustment

Installation

1. De-energize the drive system.

2. Insert 0-49061 into a free CardPak slot; tighten front-panel screws.

3. Verify +5 VDC and ±15 VDC bus power.

Frequency Calibration

1. Power on; check Power LED is ON.

2. Connect frequency meter to output terminals.

3. Adjust Frequency pot to target value (10 Hz–10 kHz).

4. Confirm 50% duty cycle with oscilloscope.

5. Lock pot; test drive synchronization.

Operation & Faults

• Normal: Power/Run LEDs ON; clean square-wave output.

• Fault LED ON: Overvoltage, short circuit, or overheating (reset after clearing fault).