User manual

CONNECTING THE AMP IN CURRENT MODE ( NO TACHOMETER )

Use this checklist for applications that don’t require a tachometer. These include

control systems that get their feedback from an encoder, as well as non-motor

applications that require a set current from the amplifier in response to the control

voltage at the input.

1. Connect DC power supply to the amplifier HV and ground.

2. Ground the amplifier chassis at P2-3.

3. Connect motor or load between OUT+(P2-1) and OUT-(P2-2).

4. Connect a reference voltage source between REF+ and REF- inputs.

5. Ground ENABLE, POS ENABLE and NEG ENABLE signals to logic ground.

6. Set DIP switches S1, S2 for motor inductance.

7. Set DIP switches S3, S4, S7 OFF and set S5, S6 ON.

8. Set REF GAIN pot to full CW.

9. Set FEEDBACK pot to full CCW.

10. Set PEAK CURRENT LIMIT pot to half CW.

11. Set CONT CURRENT LIMIT pot to half CW.

12. Set TACH GAIN pot to full CW.

13. Set IR COMP pot to full CCW.

14. Set VREF to zero volts.

15. Turn power on.

16. Check for green LED indicating normal operation.

17. Set BALANCE pot for zero volts between OUT+ and OUT -.

18. Momentarily increase reference voltage.

19. Check motor direction : is it OK ? If yes, proceed else power off, reverse OUT+

and OUT-, and power on again.

20. Set reference voltage to maximum value ( +/-10V ).

21. Check load current at CURRENT MONITOR output, or by using an ammeter in

series with the load.

22. Adjust PEAK and CONT current limit to the desired values.

AMPLIFIER

MOTOR

24-150V DC

REF +,-