Stepper motor terminal 24 V DC, 1.5 A KL2531
Error B LED
Stall detect
Turn CCW LED
Power LED
Error A LED 
Enable LED 
Turn CW LED 
Run LED 
Power contact
+24 V
Power contact 0 V
A1
B1
E1
A2
B2
E2
Top view 
Contact assembly 
extended shock and vibration range

KL2531 | Stepper motor terminal 24 V DC, 1.5 A

The KL2531 Bus Terminal is intended for the direct connection of different small stepper motors. The slimline PWM output stages for two motor coils are located in the Bus Terminal together with two inputs for limit switches. The KL2531 can be adjusted to the motor and the application by changing just a few parameters. 64-fold micro-stepping ensures particularly quiet and precise motor operation. In many applications, integrated zero-speed monitoring makes an encoder system or limit switch unnecessary.

Technical data KL2531 | KS2531
Connection technology direct motor connection
Number of outputs 1 stepper motor
Number of inputs 2
Load type uni- or bipolar stepper motors
Max. output current 1.5 A (overload- and short-circuit-proof)
Max. step frequency 125,000 steps/s
Step pattern full step, half step, up to 64-fold micro stepping
Current controller frequency approx. 25 kHz
Diagnostics LED error phase A and B, loss of step/stagnation, power, enable
Resolution approx. 5000 positions in typ. applications (per revolution)
Power supply 8…24 V DC (for output stage over power contacts)
Electrical isolation 500 V (K-bus/signal voltage)
Current consumption power contacts only load
Current consumption K-bus typ. 60 mA
Bit width in the process image input: n x 2 x 16 bit data, 2 x 16 bit control/status
Special features travel distance control
Weight approx. 50 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/see documentation
Pluggable wiring for all KSxxxx Bus Terminals
Approvals CE, UL
Accessories  
AS10xx Stepper motors 0.4 upto 5 Nm (standstill torque)
ZK47x4-04xx, ZK4000-xxxx Supply cables for Compact Drive Technology
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Product announcement
KL2531: available
KS2531: estimated market release on request