1-channel incremental encoder interface KL5151
Signal LED
Signal LED CH. B
Signal LED CH. C 
Signal LED CH. A 
Power contact
+24 V
Power contact 0 V
+24 V
0 V
Top view 
Contact assembly 
extended temperature range
extended shock and vibration range 25g

KL5151 | 1-channel incremental encoder interface

The KL5151 Bus Terminal is an interface with 24 V inputs for the direct connection of incremental encoders. A 32 bit counter with a quadrature decoder and a 32 bit latch for the zero pulse can be read, set or enabled. The KL5151 inputs can optionally be used as single or two-counter inputs. The signal inputs use 0 V as the reference potential and are electrically isolated from the K-bus.

Technical data KL5151 | KS5151
Technology incremental encoder interface 24 V DC, EN 61131-2, type 1, “0”: < 5 V DC, ”1”: > 15 V DC, typ. 5 mA
Number of channels 1 incremental encoder
Encoder connection A, B, C, gate/latch, 24 V
Sensor inputs 1
Encoder operating voltage 24 V DC
Encoder output current
Counter 32 bit, binary
Limit frequency 400,000 increments/s (with 4-fold evaluation)
Quadrature decoder 4-fold evaluation
Zero-pulse latch 32 bit
Commands read, set, enable
Power supply 24 V DC (-15 %/+20 %)
Supply voltage 24 V DC (-15 %/+20 %)
Current consumption power contacts
Current consumption K-bus typ. 40 mA
Bit width in the process image input/output: 2 x 32 bit data, 2 x 8 bit control/status
Weight approx. 50 g
Operating/storage temperature -25…+60 °C/-40…+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 CE, UL, Ex
Special terminals
KL5151-0021 incremental encoder 1 x 32 bit A, B, capture input and 1 driver output 24 V, 0.5 A
KL5151-0050 incremental encoder 2 x 32 bit A, B-track