www.wobit.com.pl
User Manual - SMC124– 15.07.2015 – v.1.2
Page 4
2.
Device description
2.1
Device designation
SMC124 is designed for operation with two phase stepper motor with bipolar winding (4-wires) or
unipolar (6 or 8-wires) used as bipolar. It allows control with step resolution in range 1/2 up to 1/128
forcing constant current value in winding independently of voltage supply value.
Features of SMC124:
Driver voltage supply 12…36 VDC.
Regulated current of motor winding
0,5…3,6A
Step resolution: 1/2, 1/8, 1/10, 1/16, 1/20, 1/32, 1/64, 1/128
Automated current reduction
Opt insulated inputs
Diodes signalizing driver operations status
Overload and thermal protection
Small dimensions
Housing adapted for mounting on DIN rail
2.2
Description of connectors and signalizing indicators
Picture. 1 Description of connectors and indicators of SMC124 driver.
No
Description
Inputs
POWER
Power supply input
12…36 VDC
MOTOR
Output for connection of stepper motor phases
EN
Enable input
DIR
Direction input
CLK
Clock input
Signalizing diodes
D1
Signalization of driver power supply
D2
Signalization of active ENABLE input (enable for operation)
D3
Signalization of active DIR input (change of operation
direction)
DP – configuration switch
2.3
Power supply
For supplying the driver it is recommended to use a non stabilized power supply unit (PSU) with
output voltage in range
+12…+36V
. PSU must receive motor return energy which provides output
capacitors with capacity at least 4700µF.
Minimal current efficiency of supply source should be selected according to relationship below:
Izas = 12/Uzas*Ister
where,
Izas
– minimal current efficiency of power supply
,
Uzas
– voltage supply,
Ister
– set current of the driver.
