2-channel digital input terminal 120/230 V AC KL1722
Signal LED 1
Signal LED 2
Input 1
Input 2
Top view 
Contact assembly 

KL1722 | 2-channel digital input terminal 120/230 V AC

The KL1722 digital input terminal acquires the binary control signals from the process level and transmits them, in an electrically isolated form, to the higher-level automation unit. It is possible to connect 120 V/230 V AC sensors directly. The Bus Terminal contains two channels that indicate their signal state by means of light emitting diodes. The KL1722 does not have any power contacts. This makes it possible to create individual potential groups. The voltage between input 1 and input 2 must not exceed the max. nominal voltage of 230 V AC.

Technical data KL1722 | KS1722
Connection technology 2-wire
Number of inputs 2
Nominal voltage 120/230 V AC
“0” signal voltage 0…40 V
“1” signal voltage 79…260 V
Input filter typ. 10 ms
Input current > 3 mA, typ. 6 mA
Current consumption K-bus typ. 3 mA
Switching times 10 ms
Electrical isolation 500 V (K-bus/mains voltage); 3750 V AC, 1 min.
Bit width in the process image 2 inputs
Configuration no address or configuration setting
Special features ohmic/capacitive input behaviour
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, GL
Ex marking II 3 G Ex nA IIC T4 Gc