The S2-3 is designed for driving two easyE-line actuators in parallel. Synchronization is achieved by adjusting actuator speed during operation.

If adjustment cannot compensate unbalance between actuators, the actuators will be stopped. This way mechanical stress and breakage can be avoided. Additionally the S2-3 includes current limiter and power stage temperature protection. S2-3 has adjustable start and stop ramps for smooth operation.

The basic control is done with Forward-, Backward-, and Stop-commands, either in continous mode or pulse mode.

Calibration input is for driving the system to its initial position. This is done with low speed.

A wide range of parameters can be altered to suit to different demands and applications.

The parameters are set with the handy interface S2-Prog or laptop pc to the Config- connector.

  • Board alone
  • 73 x 78 x 25mm (L x B x H)
  • Box
  • 102 x 73 x 47 mm (L x B x H)
  • DIN rail version
  • EEL-S2-PROGUSB Programming Cable for PC
  • S2-PROG Programming Unit
  • S2-3 has no fuse in it. Use external fuse according to application.
  • Double-check correct polarity of power supply. If connected wrong S2-3 will be damaged.
  • Please ensure that the power supply for the controller is capable of supplying sufficient current – otherwise controller and actuator may be damaged.
  • Please adjust max current to be 10% higher than maximum current during load to ensure the longest actuator lifetime.
  • Supply Voltage: 12/24VDC, filtered less than 20% ripple
  • Output voltage = supply voltage
  • Quiescent current: 15mA
  • Motor current: 2x10A cont. 2x20A, 25% duty
  • PWM frequency: 2kHz
  • Current limit: 1-20A
  • Temperature limit: 120°C (Power stage)
  • Ramp times: 0-2 sec
  • Pulse input freq.: max. 1kHz
  • Pulse inputs: pull- up/down 10kO (Hi/Lo; 4-30V/0-1V)
  • Control inputs: 0-1V=OFF; 4-30V=ON (impedance 10kO)
  • Fault output: Active, pull down max.50mA
  • Aux. voltage output: 5V/20mA
  • Measures: 78 X 73 X 25mm
  • Operating temp.range: -20° to 60°C
  • Weight of board: 110g
  • CE: Electromagnetic compatibility, Industrial Environment
  • Synchronized parallel driving
  • Current and temperature protection
  • Settable drive speed
  • Adjustable start- and stop ramp
  • Different control modes
  • Wide range of parameters
  • Easy setting with serial interface
  • Good repeatability of settings
  • Autobalance feature


  • 1GND (0V) + (blue wire for hall)
  • 2 Supply 12-35VDC (use fuse)
  • 3Actuator A +
  • 4 Actuator A –
  • 5 Actuator B –
  • 6Actuator B –
  • 7Hall b motor A (green)
  • 8Hall b motor A (green)
  • 9Forward(out) pos. command only
  • 10 Backward(in) pos. command only
  • 11Hall b motor B (green)
  • 12 Hall a motor B (yellow)
  • 13Stop, input for external stop input Pos. command only.
  • 145V/20mA output for Hall and controls e.g. FW/BW command (red wire for hall)
  • 15 Fault output, active low on alarm. Open collector.
  • 16 Calibration, pos. command starts calibration routine.
  •  Connect motors and supply as in picture. Supply voltage 12-35VDC/24VDC must be filtered ripple less than 20%.


    Connect S2-PROG or PC to the Config-connector. This can be done with power on. S2-PROG displays the type of the device. Push the select button and you can scan the parameters with arrow buttons. Parameters are changed with +/- buttons. Store new settings with save button (press and hold for more than 5 sec).

    • 1 Running speed
    • 2 Calibration speed
    • 3 Start ramp
    • 4 Stop ramp
    • 5 Current limit
    • 6 Difference limit
    • 7 Behavior
    • 8 I-trip indication
    • 9 Start condition
    • 10 Control mode
    • 11 Safety reverse time
    • 12 Auto balance trigger
    • 13 Double pulse mode
    • 14 End limit FW
    • 40-100%
    • 20-60%
    • 0-2sec
    • 0-2sec
    • 1-25A
    • 3-50pulses
    • smo->aggr
    • disa=0; ena=1
    • beidseitig=0; entgegengesetzt wenn I-trip=1; entgegengesetzt wenn stop=2; entgegengesetzt=3
    • cont=1; impuls=2; impuls-2=3; Cont + cont calibration=4
    • disa=0; 1-30 reverse time after I-trip
    • disa=0; 1-255 trigger point active
    • disa=0; ena=1
    • disa=0; FWD end limit=1-65535
    • 7
    • 20-60
    • 0-20
    • 0-20
    • 10-250
    • 3-50
    • 1-10
                  • 100(%)
                  • 60(%)
                  • 0.5(sec)
                  • 0(sec)
                  • 20(2A)
                  • 10(pulses)
                  • 5
                  • 1
                  • 1
                  • 1
                  • 0(sec)
                  • 0(pulses)
                  • 1
                  • 0(pulses)
                  • Running Speed is the speed which is used in normal mode.
                  • Calibration Speed is the low speed used during calibration-routine.
                  • Start- and stop ramps define the acceleration and deceleration time to 0-100%-0 speed.
                  • Current limit is limit value for current trip. If current value is exceeded the motors will be stopped. During the period of start ramp + 1 sec the current limit is 1,5 times the current limit set value.
                  • Difference limit is the value for largest allowable difference between A an B pulse counters. If value is exceeded motors will be stopped.
                  • Adjust behavior defines how fast and intensively the controller will adjust the synchronization between motors A and B. Smooth 1 -> Aggressive 10.
                  • I-trip-indication – fault output can be set to “on”(default) also in current trip situation.
                  • Start condition enables the device to re-start the motor to both or only to opposite direction after a trip or stop situation.
                  • Control Mode sets the control-mode. In continuous mode the motor runs as long as command (fw or bw) is “on”. In impulse mode a short command starts the motor and the direction is changed with opposite command. Motor will stop only with “stop” command. In “Impulse-2” mode motor starts with short (fw/bw) impulse. Following command stops the motor, and next command (fw/bw) starts the motor again. In “Continous(4)” mode actuators run as long as buttons are activated and during calibration buttons must be activated too. Of course, in all modes the difference limit, current limit and stop-command will stop the motors.
                  • Safety Reverse means automatic reverse run if the actuator has been stopped as a result of overload = I-trip. Stop input also triggers this function.
                  • Auto-balance trigger parameter value sets the starting point for auto balance. Value is the number of pulses counted from mechanical home.
                  • Double pulse mode enables the controller to handle actuators with double hall pulses. Must always be enabled when using easyE-line actuators.
                  • End limit fw is a pulse counter “end stop” for fw direction. The positions is determined in pulse edges from 1-65535. Value 0 means that end stop is not in use. Note: This feature cannot be used in all combinations of gear ratio and stroke length due to number of pulses may exceed 65535.
                  • Calibration routine is a calibration cycle for balancing the system. Calibration can be started by giving fw and bw commands at the same time for 3 sec or with incoming signal to calibration input. Calibration routine can be interrupted with new FW or BW command or signal to STOP input. When calibration routine starts, both motors start to run to same direction and will run until current limit stops the motor or pulses stop coming. During the calibration routine the fault led is blinking slowly. When blinking stops and both motors have stopped the device has reset the pulse counters. Now the devise is ready for use. If there is need to change the calibration direction, swap the motor wires and the hall wires.
                  • Auto balance starts balancing routine before mechanical endstop. The trigger point is set with parameter 12. If “auto balance” is active it balances the system automatically in the end of stroke. This will prevent the possible pulse error accumulation. Auto balance always works to the calibration direction.

                  During normal use it is possible to monitor the function of controller with the S2-PROG. Select the monitor mode in S2-PROG and you can check the following values:

                  • 1 current, Motor A 10-250 = 1-25A
                  • 2 current, Motor B 10-250 = 1-25A
                  • 3 pulse count/run cycle, only motor A
                  • 4 pulse count difference
                  • 5 position counter A 0-65535
                  • 6 position counter B 0-65535
                  • Pulse A and B are for incoming feedback pulse-lines. Parameter 13 must be set to “1”
                  • FW & BW are command inputs forward/backward.
                  • STOP input is for the use of external stop command (eg. end switches).
                  • Calibration input is for starting the calibration routine.
                  • FAULT output – refer to fall situations on page 3
                  • INPUTS: 4V-30V as “high” signal level and 0V-1V as “low” signal level
                  • OUTPUT: NPN open collector max. 50m

                  In normal mode both switches SW1/SW2 are set to most right position. (See „Screw terminals“)

                  Feedback Pulse

                  The controller counts pulse edges so counted value is double compared to the actual number of pulses.


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