Schneider Electric ATV71HC40N4 Altivar 71 Variable Speed Drive

Schneider Electric ATV71HC40N4 Altivar 71 Variable Speed Drive

Configured for high-power motor speed control in Altivar 71 drive platforms, the Schneider Electric ATV71HC40N4 (ATV71 variable speed drive) provides direct physical/electrical execution for three-phase motor regulation, power conversion, and control signal processing. The drive handles 380...480 V AC input, 400 kW / 600 hp motor applications, and integrates EMC filtering, Modbus/CANopen communication, and configurable analog/digital I/O interfaces.

Hardware Specifications

Profinet / EtherNet-IP Deterministic Network and Drive Control Architecture

The Altivar 71 platform supports deterministic industrial communication through optional network interface cards, including EtherNet/IP, Modbus TCP, Profibus DP, DeviceNet, and CANopen extensions. The ATV71HC40N4 processes motor commands, feedback signals, and parameter data through internal control logic with configurable communication access.

The drive supports flux vector control with encoder feedback, sensorless flux vector control, and voltage/frequency control profiles. Speed accuracy reaches +/- 0.01 % of nominal speed in closed-loop operation with encoder feedback, while torque regulation supports closed-loop accuracy of +/- 5 %.

I/O Density Scaling and Control Signal Processing

The ATV71HC40N4 provides configurable analog and digital interfaces for machine control integration. Analog input channels support bipolar voltage, current, and voltage references, while relay outputs provide configurable switching functions.

Signal characteristics include:

• AI1 differential voltage input: +/- 10 V DC, 11 bits + sign resolution
• AI2 configurable current input: 0...20 mA
• AI2 configurable voltage input: 0...10 V DC
• AO1 configurable output: 0...20 mA or 0...10 V DC
• Digital inputs: 24 V DC programmable logic
• Safety input: PWR 24 V DC conforming to ISO 13849-1 level d

Frequently Asked Questions (FAQ)

Q: Does the ATV71HC40N4 support encoder feedback for closed-loop speed control? A: Yes. The drive supports closed-loop asynchronous motor control using encoder feedback through an optional encoder interface card.

Q: What communication interfaces are available on the ATV71HC40N4? A: The standard communication interfaces include Modbus RTU and CANopen. Optional communication cards support additional industrial protocols.

Q: What are the motor cable length limitations? A: The maximum motor cable length is 100 m with shielded cable and 200 m with unshielded cable under specified installation conditions.

Field Installation Guidelines

Install the drive vertically with sufficient clearance for heat sink ventilation and service access. Use cable routing practices that separate power conductors from control and communication wiring to reduce electromagnetic interference.

Connect motor cables using shielded cable where EMC performance is required. Terminate cable shields according to industrial EMC grounding practices, with low-impedance connections to the drive enclosure or grounding points.

Verify terminal tightening torque according to the manufacturer installation documentation. Inspect power terminals, DC bus connections, and control wiring before energizing the unit.

For communication networks, use suitable RS 485 wiring practices for Modbus connections, including correct polarity, termination, and cable shielding. Avoid routing communication cables parallel to high-current motor conductors.