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votage range:24vAC-60vAC, current range:2.0A-6.0A, high performance digital stepper motor driver, ac motor driver - details see: https://www.machineto.com/m660a-ac-stepper-motor-6a-stepper-motor-driver-ac-and-dc-steper-motor-driver-10234862

M545D dc stepper motor driver features:

1. high performance

2. over current, over voltage, under voltage, over heating, autmatic semi-flow prection fuctions

3. anti-noise, low vibration

4.dimensions: 142mm×99mm×48mm
5. drive all the 2 phase, current under 6.0A stepper motor

6.Working environment: temperature: 15-40, humidity <90%

Current selection

REF	Peak	SW1	SW2	SW3
2.00A	2.40A	on	on	on
2.57A	3.08A	off	on	on
3.14A	3.77A	on	off	on
3.71A	4.45A	off	off	on
4.28A	5.14A	on	on	off
4.86A	5.83A	off	on	off
5.43A	6.52A	on	off	off
6.00A	7.20A	off	off	off

Microstep selection

Pulse/Rev	SW5	SW6	SW7	SW8
400	on	on	on	on
800	on	off	on	on
1600	on	on	off	on
3200	on	off	off	on
6400	on	on	on	off
12800	on	off	on	off
25600	on	on	off	off
51200	on	off	off	off
1000	off	on	on	on
2000	off	off	on	on
5000	off	on	off	on
10000	off	off	off	on
25000	off	on	on	off
50000	off	off	on	off

Driver functions descriptions

Driver function	Operating instructions
Output current setting	Users can set the driver output current by SW1-SW3 three switches. The setting of the specific output current, please refer to the instructions of the driver panel figure.
Microstep setting	Users can set the driver Microstep by the SW5-SW8 four switches. The setting of the specific Microstep subdivision, please refer to the instructions of the driver panel figure.
Automatic half current function	Users can set the driver half flow function by SW4. "OFF" indicates the quiescent current is set to half of the dynamic current, that is to say, 0.5 seconds after the cessation of the pulse, current reduce to about half automatically. "ON" indicates the quiescent current and the dynamic current are the same. User can set SW4 to "OFF", in order to reduce motor and driver heating and improve reliability.
Signal interfaces	PUL+ and PUL- are the positive and negative side of control pulse signal; DIR+ and DIR- are the positive and negative side of direction signal; ENA+ and ENA- are the positive and negative side of enable signal.
Motor interfaces	A+ and A- are connected to a phase winding of motor; B+ and B- are connected to another phase winding of motor. If you need to backward, one of the phase windings can be reversed.
Power interfaces	It uses AC power supply. Recommended operating voltage is 24VAC-60VAC, and power consumption should be greater than 350W.
Indicator lights	There are two indicator lights. Power indicator is green. When the driver power on, the green light will always be lit. Fault indicator is red, when there is over-voltage or over-current fault, the red light will always be lit; after the driver fault is cleared, if re-power the red light will be off.
Installation instructions	Driver dimensions:142×99×48mm, please refer to dimensions diagram. Please leave 10CM space for heat dissipation. During installation, it should be close to the metal cabinet for heat dissipation.

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