2-channel digital input terminal 24 V DC for NAMUR sensors  KL1352
Signal LED 1
Error LED 1
Signal LED 2
Error LED2
Power contact
+24 V
Power contact 0 V
+Input 1
-Input 1
+Input 2
+24 V
0 V
-Input 2
Top view 
Contact assembly 

KL1352 | 2-channel digital input terminal 24 V DC for NAMUR sensors

The digital input terminal KL1352 analyses the input signal from NAMUR sensors in accordance with EN 50277 (previously DIN 19234). One bit indicates the sensor’s signal state in the process image. Another bit signals short-circuits or open leads. Red or green LEDs indicate the state of the two input bits.

Technical data KL1352 | KS1352
Connection technology 2-wire
Specification NAMUR
Number of inputs 2
Nominal voltage 24 V (-15 %/+20 %)
“0“ signal voltage ≤ 1.2 mA
“1“ signal voltage ≥ 2.1 mA
“0“ signal current ≤ 1.2 mA
“1“ signal current ≥ 2.1 mA
Switching hysteresis 0.2 mA
Short circuit current typ. 8.2 mA
Short circuit detection > 6.5 mA
Input filter 3.0 ms
Current consumption K-bus typ. 70 mA
Electrical isolation 500 V (K-bus/field potential)
Bit width in the process image 4 inputs
Configuration no address or configuration setting
Special features NAMUR
Weight approx. 55 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 CE, UL, Ex, GL, IECEx