Incremental encoder interface with programmable outputs KL5121
A, B
Latch, gate
Output 1, 2
Output 3, 4
Power contact
+24 V
Power contact 0 V
A, B
+24 V (2x)
0 V (2x)
Latch, gate
Output 1, 2
+24 V (2x)
0 V (2x)
Output 3, 4
Top view 
Contact assembly 
extended shock and vibration range 25g

KL5121 | Incremental encoder interface with programmable outputs

The KL5121 Bus Terminal can be used to implement a linear path control. The terminal reads an incremental signal, which can be supplied by an incremental encoder or a pulse generator, and switches the outputs when the counter reaches a previously defined state. The counter states can be transmitted to the terminal by the higher-level automation device in the form of a table. The position is acquired with the aid of the latch input, which is activated/deactivated by the gate input. Up to four 24 V outputs can be switched. The LEDs indicate the states of the signals at the various inputs and outputs.

Technical data KL5121 | KS5121
Technology incremental encoder interface with programmable outputs
Number of channels 1 incremental encoder + 4 outputs
Encoder connection A, B, latch, gate
Encoder operating voltage 24 V DC
Counter 16 bit, binary
Limit frequency 1 million increments/s (with 4-fold evaluation)
Output voltage 24 V
Output current 0.5 A
Switching times < 100 µs
Power supply 24 V DC (-15 %/+20 %)
Supply voltage 24 V DC (-15 %/+20 %)
Current consumption power contacts typ. 30 mA + load
Current consumption K-bus typ. 60 mA
Bit width in the process image input/output: 2 x 16 bit data, 2 x 8 bit control/status
Special features electronic camshaft controller
Weight approx. 60 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/variable
Pluggable wiring for all KSxxxx Bus Terminals
Approvals/markings CE, UL, ATEX
Ex marking II 3 G Ex nA IIC T4 Gc