Reliance Electric 0-57670-A Universal Drive Controller for MaxPak Plus Systems

Product Overview

The Reliance Electric 0-57670-A is a versatile universal drive controller engineered as a key component of the Reliance Electric MaxPak Plus modular drive platform, a system widely recognized for its flexibility and reliability in industrial motor control applications. This compact AC drive module integrates complete motor control logic, power inversion circuitry, and communication interfaces into a single DIN-rail or panel-mountable unit, making it an ideal solution for a broad spectrum of variable-speed applications. As a member of the MaxPak Plus family, the Reliance Electric 0-57670-A is designed to seamlessly interface with the AutoMax distributed control system (DCS), providing a robust bridge between field motors and central automation infrastructure.

The Reliance Electric 0-57670-A is specifically rated for 3 HP (2.2 kW) three-phase motors operating at 230 VAC, with an adjustable output frequency range of 0–400 Hz. It supports two primary control modes: standard V/Hz control for constant or variable torque applications, and sensorless vector control, which delivers enhanced low-speed torque precision for applications demanding superior dynamic response. This dual-mode capability, combined with integrated Class B EMC filtering and comprehensive protection logic, positions the Reliance Electric 0-57670-A as a cost-effective yet highly capable solution for modernizing legacy motor control systems or equipping new installations.

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Description

Technical Specifications

Parameter Name	Value
Product Model	Reliance Electric 0-57670-A
Manufacturer	Reliance Electric (now Rockwell Automation)
Product Type	Universal AC Drive Controller / VFD
Series/Platform	MaxPak Plus
Rated Power	3 HP (2.2 kW)
Input Voltage	230 VAC ±10%, 3-phase, 50/60 Hz
Output Voltage	0–230 VAC (adjustable)
Output Frequency Range	0–400 Hz
Control Modes	V/Hz, Sensorless Vector Control
Overload Capacity	150% of rated current for 60 seconds
Communication Interface	RS-485 (DSI / Modbus RTU)
Built-in EMC Filter	Class B (EN 61800-3 compliant)
Mounting Method	DIN Rail or Panel Mount
Protection Class	IP20 (cabinet installation only)
Operating Temperature	0°C to +40°C (derating to +50°C)
Cooling Method	Forced air (integrated fan)
Compliance	CE, UL

Main Features and Advantages

The Reliance Electric 0-57670-A offers a compelling combination of flexible control, robust connectivity, and ease of use, making it a preferred choice for a wide range of industrial drive applications.

Flexible Control Options: The Reliance Electric 0-57670-A supports both V/Hz control for general-purpose applications and sensorless vector control for applications requiring precise speed regulation and high torque at low RPMs. This allows users to optimize the drive’s performance for specific load characteristics, from simple fans and pumps to more demanding conveyor and material handling systems.

Intelligent Communication and Network Integration: The Reliance Electric 0-57670-A is equipped with an RS-485 communication port that supports both Reliance Electric’s proprietary DSI (Drive Serial Interface) protocol and the industry-standard Modbus RTU protocol. This dual-protocol support facilitates seamless integration with AutoMax PLCs for high-speed, synchronized control, as well as with third-party SCADA systems and HMIs, maximizing the module’s interoperability within diverse automation environments.

Built-in EMC Filtering and Compact Design: The Reliance Electric 0-57670-A features an integrated Class B EMC filter, significantly reducing the high-frequency harmonics that can interfere with nearby sensitive equipment. This integrated design eliminates the need for external filtering components, simplifying cabinet layout and reducing installation costs. The module’s compact footprint and support for both DIN-rail and panel mounting provide flexibility for system designers and panel builders.

Comprehensive Protection and Reliability: The Reliance Electric 0-57670-A incorporates robust protection features including overcurrent, overvoltage, undervoltage, overtemperature, motor overload, and ground fault protection. These safeguards ensure the longevity of both the drive and the connected motor, minimizing unplanned downtime. The module’s modular design also simplifies maintenance, as a faulty unit can be quickly replaced without dismantling power components.