8-channel digital input terminal 24 V DC KL1408
Signal LED 8
Signal LED6
Signal LED 4
Signal LED2
Signal LED7 
Signal LED5 
Signal LED3 
Signal LED1 
Power contact
+24 V
Power contact 0 V
Input 1
Input 3
Input 5
Input 7
Input 2
Input 4
Input 6
Input 8
Top view 
Contact assembly 
extended temperature range
extended shock and vibration range

KL1408 | 8-channel digital input terminal 24 V DC

The digital input terminal KL1408 acquires the binary control signals from the process level and transmits them, in an electrically isolated form, to the higher-level automation unit. The Bus Terminal contains eight channels which indicate their signal state by means of light emitting diodes. It is particularly suitable for space-saving use in control cabinets. By using the single-ended connection technique, a multi-channel sensor can be connected in the smallest space with a minimum amount of wiring. The power contacts are looped through. For the KL1408, the reference ground for all inputs is the 0 V power contact.

Technical data KL1408 | KS1408
Connection technology 1-wire
Specification EN 61131-2, type 1/3
Number of inputs 8
Nominal voltage 24 V DC (-15 %/+20 %)
“0“ signal voltage -3…+5 V (EN 61131-2, type 1/3)
“1“ signal voltage 11…30 V (EN 61131-2, type 3)
“0“ signal current 0…1.5 mA
“1“ signal current 2.0…2.5 mA
Input filter typ. 3.0 ms
Current consumption K-bus typ. 5 mA
Current consumption power contacts typ. 2 mA + load
Electrical isolation 500 V (K-bus/field potential)
Bit width in the process image 8 inputs
Configuration no address or configuration setting
Weight approx. 55 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, GL