Epsilon Series Digital Servo Drive
5 lb-in to 39 lb-in Torque Range (0.5 Nm to 2.7 Nm)
The Epsilon drives are stand-alone, fully digital brushless servo drives designed and built to reliably provide high performance and flexibility without sacrificing ease of use. Whether the drives are utilized in base drive only applications or with a closed loop controller, setup can be achieved in just minutes with no-charge PowerTools software. The use of a State-Space algorithm makes tuning very simple and forgiving. The drives are designed to operate with up to a 10 :1 inertia mismatch right out of the box. Higher (50 :1 and more) inertial mismatches are possible with two simple parameter settings.

The different configurations are:
Eb Epsilon Base
Ei Drives
Ei-DN Epsilon DeviceNet Ready
90 to 264 VAC 1Ø input power
Up to 40 lb-in continuous torque
New Drive Feature: Software Scope with Data Capture
Drive options: Base, Indexing and Indexing with DeviceNet
Easy install, setup and operation
Compact, space saving design, six-inch(152mm) panel depth including cables
Pluggable connectors, Standard D-Shell and screw terminals
State-Space Observer Control allowing a 10-1 inertia mismatch out of the box and 50-1 with tuning
Free PowerTools software and upgrades
Programmable, optically-isolated I/O
RS-232/485 serial communication interface using Modbus protocol
14-segment status and diagnostic display, time-stamping of last 10 faults for easy troubleshooting
Field programmable flash memory firmware (upgrades are free)
Custom motor support for any servo motor with encoder feedback
24VDC auxiliary input for logic backup

Epsilon Eb (Base) Drives

The Epsilon Series Eb Drive is a compact drive that is ideal for use with single and multi-axis controllers, PLCs and host controllers. The analog torque or velocity modes can be used with classic position controllers using analog outputs and encoder inputs. The pulse  mode is ideal for use with low-cost PLC stepper controllers. This drive works in a variety of applications where a host control provides a command signal determining the desired motion profile. 

The Eb Drive is configurable for seven flexible modes of operation, and the parameters for each mode can be adjusted to tailor the drive to the specific application using Windows(TM)¨-based PowerTools FM(TM) software.

Seven modes of operation:
- Analogue Velocity mode
- Analogue Torque mode
- Pulse Follower
     -Pulse/Pulse
     -Pulse/Direction
     -Pulse/Quadrature
- Digital Velocity preset
- Summation of Analogue Velocity plus Digital Velocity
Programmable I/O
5 optically isolated inputs
3 optically isolated outputs
1 analog input +/-10 VDC, 14 bit
2 analog output +/-10 VDC, 10 bit
Programmable encoder output (up to 2,048 lines per revolution)
Separate stop and travel limit decel ramps
Epsilon Ei Drives
The Epsilon Series Ei (Indexing) Drive offers indexing, homing and jogging, and additional I/O in a package that is the same compact size as the Eb Epsilon Drive. Operating information is setup via a PC. These setup parameters are easily entered and stored with the use of our feature filled Windows(R)-based Power Tools-FM (TM) software. The setup can be downloaded, stored on disk or printed out for documentation.
16 Pre-programmed Indexes
  Capabile of Index Chaining and Compounding (New)
  Feed/Registration to Torque Level
Alternate Mode of Operation (New)
  Switch Between: Analog Velocity, Analog Torque, and Pulse Pulse Mode
Jogging Function
Homing Function: Multi Mode Homing Opertations (New Additions)
Fixed units include:
distance (revs);
velocity (RPM)
accel/decel (ms/kRPM)
12 general purpose inputs
7 general purpose outputs

Epsilon Ei-DN Drives

Small size and large functionality makes the Epsilon Ei-DN a natural fit in any DeviceNet related motion application. The Ei-DN retains the same footprint as the Ei and now uses Polled I/O and Explicit Messages to change or initiate any user parameter in the drive via DeviceNet. Choose between any one of four predefined DeviceNet word setups. 

  • Index Select Predefined (Static DeviceNet Word Block full Ei features)

  • Index Select Userdefined (Dynamic DeviceNet Word Block, full Ei features)

  • Index Type (Position Control with Ei functionality)

  • Position Control (Position Control only)

Supports Explicit Messaging
Polled (8 bytes in, 8 bytes out)*
Up to 63 devices per network
Baud Rate (125k, 250k, 500k) and MacID configurable via PowerTools FM or the "one touch" reset button
Module and Status LSD's located on the front of the drive
25 milliamp DeviceNet draw
Easy 5-wire terminal block for DeviceNet connection
*In and Out refers to PLC Inputs and Outputs

LISTED E147827