1. Part Number

2. Brand

3. Category

4. Official Name

5. Basic Information

• Manufacturer: Reliance Electric (USA)

• Form Factor: Standard 19” rack-mount plug-in PCB (Cardpack chassis)

• Status: Obsolete / Discontinued (only surplus, used, or refurbished units available)

• Front Panel: 2 rotary potentiometers (Rate / Gain) for loop tuning

• Components: Over 30 ICs, op-amps, comparators, and discrete components

• Weight: Approx. 1.4 kg

6. Function & Application

• Core Function: Precision current loop drive and feedback processing for DC/AC drives. Conditions, amplifies, and stabilizes current feedback signals to provide closed-loop current regulation, overcurrent protection, and adjustable loop gain/response rate.

• Application: Used in Reliance MaxPak DC drives, VS spindle drives, and GV3000 AC drives to ensure stable, accurate current control under dynamic loads.

7. Specifications

• Signal Interface: Analog current/voltage feedback (±5VDC / 0–10VDC)

• Output: Buffered, stabilized current loop drive signal

• Adjustments: Gain (sensitivity) and Rate (response speed) via front knobs

• Isolation Voltage: 500VDC (I/O isolation)

• Operating Temperature: 0°C to +55°C

• Storage Temperature: -40°C to +85°C

• Protection: Overcurrent, short-circuit, EMI filtering

8. Compatible Equipment

• Reliance MaxPak Series DC Drives

• VS Spindle Drives

• GV3000 Series AC Drives

• Legacy Cardpack Systems

9. Industries