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Stepper motor drivers
g Closed loop positioning controller with encoder input, SMCI35
Inputs/Outputs (X4)
Inputs/Outputs (X5) JST-ZHR 6
Pin Function*
1 GND
2 Output 3
3 Output 2
4 Input 3
5 Input 2
6 Input 1
Communication (X1)
Pin Function*
1 GND
2 TX
3 RX
Encoder (X2) JST-ZHR 5
Pin Function*
1 GND
2 CH-B
3 INDEX
4 CH-A
5 +5 V
Motor and supply (X3)
Pin Function*
1 Motor coil A
2 Motor coil A\
3 Motor coil B
4 Motor coil B\
5 UB 24-48 V
6 GND
Pin Function* Function on delivery
1 Output 1
2 Input 6 CLOCK
3 Input 5 DIRECTION
4 Input 4 ENABLE
5 Analog in 1
6 GND
Technical data
Operating voltage: DC 24 - 48 V
Phase current: max. 6 A
Interface: TTL-RS232 (3.3 V)
Operating mode: Position, speed, flag position, clock direction, analog, joystick
Step resolution: 1/1, 1/2, 1/4, 1/5, 1/8, 1/10, 1/32, 1/64
Step frequency:
16 kHz with a full step, corresponding multiples with a microstep
(e.g. up to 1 MHz with 1/64)
Inputs: 6 digital inputs (TTL), 1 analog input +10/–10 V
Outputs: 3 digital outputs (TTL)
Position monitoring: Yes, depending on the encoder
Current reduction: Adjustable 0 - 100%
Protection circuit: Overvoltage, undervoltage and heatsink temperature > 80 °C
Temperature range: 0 to +40 °C
When the SMCI35 is delivered, it is preconfigured to clock direction mode. Connection to the PC is not
necessary. The phase current can be set in 10% steps on a DIP switch (10% = 400mA, max. 150% = 6A).
The inputs for the clock, direction and enable signal are already preconfigured on the X4 connector. The step
mode can only be changed via software. Full step is preset. Sinusoidal commutation, however, means extre-
mely smooth running and very good performance of the stepper motor is already achieved in the full step.
Order number
SMCI35
Outline drawing (mm)
Input circuits
* from the perspective of the connected controller
DIP switch:
Setting the motor current from 10 - 150%
