4-channel digital input terminal 24 V DC KL1404
Signal LED4
Signal LED2
Signal LED3 
Signal LED1 
Power contact
+24 V
Power contact 0 V
Input 1
Input 3
Input 2
+24 V
+24 V
Input 4
Top view 
Contact assembly 
extended shock and vibration range

KL1404 | 4-channel digital input terminal 24 V DC

The KL1404 digital input terminal acquires the binary 24 V control signals and transmits them, in an electrically isolated form, to the higher-level automation unit. The Bus Terminal contains four channels that indicate their signal state by means of LEDs. The input signal corresponds to EN 61131-2 type 3 and is compatible with type 1. Additionally, the 4-channel Bus Terminal enables the direct connection of four 2-wire sensors. Four +24 V connection points are provided.

Technical data KL1404 | KS1404
Connection technology 2-wire
Specification EN 61131-2, type 1/3
Number of inputs 4
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. 3 mA
Current consumption power contacts typ. 1 mA + load
Electrical isolation 500 V (K-bus/field potential)
Bit width in the process image 4 inputs
Configuration no address or configuration setting
Weight approx. 50 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