Manufacturer: Reliance Electric, USA

Mounting: Standard 19” rack-mount plug-in PCB (Cardpack)

Status: Obsolete / Discontinued (refurbished/surplus only)

Features: Front panel with 2–3 rotary potentiometer knobs for gain/rate adjustment

Weight: ~1.4 kg

Core Function: Precision current loop driving & feedback processing in DC/AC drives. It conditions, amplifies, and stabilizes current feedback signals, providing closed-loop current regulation, overcurrent protection, and loop gain/rate control for stable motor operation under dynamic loads.

Positioning: Key current-loop driver card for Reliance MaxPak & VS series drives, ensuring accurate and safe current control.

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

Output: Buffered, stabilized current loop drive signal

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

Isolation: 500VDC I/O isolation

Operating Temp: 0°C ~ +55°C

Storage Temp: -40°C ~ +85°C

Protection: Overcurrent, short-circuit, EMI filtering

Drive main rack (MaxPak / Cardpack series)

Shielded current/feedback signal cables

Backplane connector & rack mounting hardware

Terminal blocks & adjustment screwdriver

Equipment: Reliance MaxPak DC drives, VS spindle drives, GV3000 AC drives, legacy Cardpack systems

Fields: CNC machine tools, metallurgical rolling mills, paper/printing, textile machinery, industrial automation lines requiring precise current regulation.