Servo Drives

REL EtherCAT AC Servo Drive

EtherCAT networked 100 percent digital AC servo drive for brushless or brush motors operating from single or three-phase AC mains with up to 4 kW continuous output supporting RSF RKF FHA-C and SHA actuators

ModelREL
SeriesREL Series
Global Stock Network Custom Gear Ratios Application Engineering STO Safety Compliant
REL product image 1
REL
Model

REL · 1 product image· Contact LVH for CAD files

Product Overview

The REL combines EtherCAT networking with 100 percent digital control of brushless or brush motors in AC-line powered package operating from single or three-phase mains with continuous power output to 4 kW. Available in REL-230-18 REL-230-36 and REL-230-40 models. Supports FHA-C mini FHA-C SHA RSF and RKF actuators with 14-wire incremental 4-wire serial and absolute encoder interfaces. Dimensions 202 x 139 x 52 mm.

The REL is a dedicated servo drive for precision motion control, providing communication, control-loop processing, and power delivery for compatible actuators and motors.

📐
Outer Diameter
⚖️
Weight
🔩
Hollow Shaft
💪
Max Torque
🔄
Max Speed
⚙️
Gear Ratios
🎯
Output Type
Servo drive

Servo Drive Capabilities

Harmonic Drive servo drives are optimised for use with FHA, SHA, RSF, and RKF series actuators. Both AC-line powered and DC-powered variants support position, velocity, and torque control with fieldbus networking and comprehensive digital I/O.

📡

Fieldbus Networking

EtherCAT, CANopen, DeviceNet, MECHATROLINK-II, and CC-Link options across the series.

🔄

Full Control Modes

Position, velocity, and torque control with CSP, CSV, and CST cyclic sync modes.

🎯

Dedicated Actuator Support

Optimised gain tables and encoder interfaces for Harmonic Drive actuator families.

Autotuning

Automatic servo gain adjustment reduces commissioning time on compatible models.

🔌

Digital I/O

Multiple digital inputs and outputs for PLC integration, safety relays, and position switches.

🔧

Cabinet Mounting

Standard panel mount form factor for industrial control cabinet installation.

Compatible Actuator Families

The REL is compatible with Harmonic Drive FHA-C, FHA-Mini, SHA, RSF, and RKF series actuators. Contact LVH Systems to confirm the correct drive model and firmware for your specific actuator and application requirements.

Key Specifications

Critical performance parameters at a glance

📊
REL-230-18, REL-230-36, REL-230-40
Available Models
📊
Up to 4 kW
Max Continuous Power
📊
AC100V or AC200V single or three-phase
Supply Voltage
📊
EtherCAT CoE RS-232 optional RS-485
Communication
📊
Indexer PVT Camming Gearing Position Velocity Torque
Control Modes
📊
14-wire incremental 4-wire serial HD Absolute encoder
Encoder Interfaces
📊
15 inputs 6 outputs
Digital I/O
📊
2 16-bit inputs 1 12-bit output
Analog I/O

Technical Specifications

Overview

Available Models
REL-230-18, REL-230-36, REL-230-40
Max Continuous Power
Up to 4 kW
Supply Voltage
AC100V or AC200V single or three-phase
Communication
EtherCAT CoE RS-232 optional RS-485
Control Modes
Indexer PVT Camming Gearing Position Velocity Torque
Encoder Interfaces
14-wire incremental 4-wire serial HD Absolute encoder
Digital I/O
15 inputs 6 outputs
Analog I/O
2 16-bit inputs 1 12-bit output
Dimensions
202 x 139 x 52 mm

Compatible Actuators

FHA-Mini Compatible
FHA-8C FHA-11C FHA-14C with AC100/200V
FHA-C Compatible
FHA-17C FHA-25C FHA-32C FHA-40C
SHA Compatible
SHA-20A SHA-25A SHA-32A SHA-40A
RSF/RKF Compatible
RSF-17A RSF-20A RSF-25A RSF-32A RKF-20A RKF-25A RKF-32A

Product Attributes

Product Type
EtherCAT AC Servo Drive
Communication
EtherCAT CoE RS-232
Max Power
Up to 4 kW
Motor Types
Brushless and brush motors
Compatible Actuators
FHA-C SHA RSF RKF series
Manufacturer
Harmonic Drive LLC

Industrial Applications

These servo drives are applied in industrial control systems where precise motor control, communication support, and reliable axis management are required.

Servo Motion Control

Controls rotary and linear servo axes in automation systems that need accurate speed, torque, and position regulation.

Motion controlServo axesIndustrial
🏭

Factory Automation

Used in machine tools, packaging lines, assembly equipment, and other automated production systems with networked motor control.

PLCAutomationProduction
🧠

Networked Control Systems

Supports coordinated multi-axis systems where industrial communications and deterministic control matter.

EtherCATFieldbusMulti-axis
📦

Machine Builder Platforms

Integrated into OEM control cabinets and machine architectures that require compact, dependable servo amplifier solutions.

OEMControl cabinetsMachine builders
🛠️

Retrofits & Upgrades

Useful in modernization projects where older motion platforms are upgraded to newer digital servo control hardware.

RetrofitUpgradeControl
🔄

Precision Process Equipment

Applied in systems requiring stable servo behaviour for repetitive, high-accuracy industrial processes.

PrecisionRepeatableIndustrial process
Customization Available

Factory Modification & Custom Sourcing

This product supports custom configurations and equivalent sourcing

Available Modifications

  • Torque and speed ratio customization
  • Mounting interface modifications
  • Connector and wiring specifications
  • Housing and enclosure options

Sourcing Options

  • Standard product sourcing
  • Equivalent product identification
  • Replacement part sourcing
  • Volume pricing (MOQ may apply)

Request Pricing & Availability

Submit an RFQ for standard products, custom configurations, or equivalent alternatives

Expert Answers

Frequently Asked Questions

Technical answers sourced from engineering specifications and integration guides.

The REL combines EtherCAT networking with fully digital control of brushless or brush motors in an AC-line powered package delivering up to 4 kW continuous power from single or three-phase mains.

Have a technical question not answered above?

Our application engineers review every RFQ and respond with specification-matched recommendations.

Ask an Engineer