4-channel analog input terminal 0…20 mA KL3444
Error LED 4
Run LED 4
Error LED2
Run LED 2
Error LED 3 
Run LED 3 
Error LED 1 
Run LED 1 
Power contact
+24 V
Power contact 0 V
Input 1
Input 3
Input 2
Input 4
Top view 
Contact assembly 
extended shock and vibration range

KL3444 | 4-channel analog input terminal 0…20 mA

The KL3444 analog input terminal processes signals in the range between 0 and 20 mA. The current is digitised to a resolution of 12 bits and is transmitted, in an electrically isolated form, to the higher-level automation device. In the KL3444, the four inputs are 2-wire versions and have a common ground potential. The reference ground of the inputs is the internal ground. Overload is detected. The terminal status is relayed to the controller via the K-bus. The LEDs indicate the data exchange with the Bus Coupler as well as overload or wire breakage.

Technical data KL3444 | KS3444
Number of inputs 4
Power supply via the K-bus
Signal current 0…20 mA
Technology single-ended
Internal resistance < 85 Ω
Common-mode voltage UCM
Conversion time ~ 2 ms
Resolution 12 bit
Measuring error < ±0.3 % (relative to full scale value)
Surge voltage resistance 30 V DC
Electrical isolation 500 V (K-bus/signal voltage)
Current consumption power contacts
Current consumption K-bus typ. 85 mA
Bit width in the process image input: 4 x 16 bit data (4 x 8 bit control/status optional)
Configuration no address or configuration setting
Special features
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