Product Description

Model Number Interpretation

• 2: Standard industrial drive series

• EC: FlexPak VS AC drive platform

• 4075: 460V input, 75 HP power rating, hardware revision 75

• Alternate PN: 892.68.10 C (OEM part number)

Technical Specifications

• Motor Power: 75 HP (55 kW)

• Input Voltage: 460 VAC ±10%, 3-phase, 50/60 Hz

• Output Voltage: 0–460 VAC, 3-phase, 0–400 Hz

• Rated Current: 90 A continuous

• Control Modes: V/F (Volts/Frequency), sensorless vector

• Protection: Overcurrent, overvoltage, undervoltage, overtemperature, short-circuit, ground fault

• Operating Temp: 0 °C to +45 °C

• Mounting: Floor-standing or panel-mount

• Weight: ~68 kg (150 lbs)

• Dimensions: 450 × 350 × 200 mm (H×W×D)

Interface and Communication Configuration

• Power Terminals: Main AC input, motor output, DC bus braking terminals

• Control I/O: ±10 V analog input (speed reference), 24 VDC digital I/O (start/stop, fault reset, jog)

• Communication: Supports Reliance proprietary protocol; optional DeviceNet/Profibus DP modules for PLC integration

• Feedback: Optional encoder port for closed-loop speed control

• Indicators: LED status lights (power, run, fault); 7-segment display for fault codes and parameters

Core Functions

• Precision AC Motor Control: Regulates speed, torque, and direction for 75 HP 3-phase AC motors

• V/F & Sensorless Vector Control: Optimizes efficiency for fans, pumps, conveyors, and extruders

• Dynamic Braking: Integrated DC bus braking for rapid deceleration (optional external brake resistor)

• Fault Diagnostics: Real-time monitoring with fault code logging (overtemp, overcurrent, etc.)

• Parameter Programming: Onboard display or PC software for configuration of acceleration/deceleration, limits, and I/O

Application Scenarios

• Factory Automation: Conveyor lines, assembly stations, packaging machinery

• Process Industry: Pumps, fans, mixers, and extruders requiring variable-speed control

• Material Handling: Cranes, hoists, and lift equipment with 75 HP AC motors

• Legacy System Upgrades: Direct replacement for older Reliance FlexPak VS drives in modernized lines

Usage and Maintenance Instructions

• Installation: Mount in a clean, well-ventilated cabinet; allow 100 mm clearance for airflow

• Wiring: Use shielded cables for motor/control signals; torque terminals to 1.5 N·m; verify input voltage before power-up

• Operation: Power on control circuit first, then main power; set parameters per motor nameplate

• Maintenance: Inspect connections quarterly; clean heat sink/filters semi-annually; check brake resistor condition

• Safety: Disconnect all power and wait 5 minutes for DC bus capacitors to discharge before service