2-channel analog input terminal 0…20 mA (accuracy 0.05 %) KL3142
Error LED 2
Run LED 2
Error LED 1 
Run LED 1 
Power LED (K-bus) 
Power contact
+24 V
Power contact 0 V
+Input 1
-Input 1
+Input 2
-Input 2
Top view 
Contact assembly 

KL3142 | 2-channel analog input terminal 0…20 mA (accuracy 0.05 %)

The KL3142 analog input terminal handles signals in the range between 0 and 20 mA. The current is digitised to a resolution of 16 bits, and is transmitted, in an electrically isolated form, to the higher-level automation device. The input channels of the Bus Terminal have differential inputs and a common, internal ground potential. With its high measurement accuracy of ±0.05 % (relative to full scale value), the terminal is optimised for high-precision control processes, such as dosing, filling, or quality assurance. The KL3142 combines two channels in a single housing. An open lead or overload condition are detected, and the terminal status is relayed to the controller via the K-bus. The run LEDs indicate data exchange with the Bus Coupler, the error LEDs indicate overload.

Technical data KL3142 | KS3142
Number of inputs 2
Power supply via the K-bus
Signal current 0…20 mA
Technology differential input
Internal resistance typ. 100 Ω shunt
Common-mode voltage UCM max. ±10 V
Resolution 16 bit
Conversion time 140 ms, configurable
Filter 50 Hz, configurable
Measuring error < ±0.05 % (relative to full scale value)
Surge voltage resistance 35 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: 2 x 16 bit data (2 x 8 bit control/status optional)
Special features increased measuring accuracy
Weight approx. 70 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
Ex marking II 3 G Ex nA IIC T4 Gc
Ordering information
KL3142 2-channel analog input terminal 0…20 mA, differential input, 16 bit, ±0,05 % accuracy
KL3142-0050 Siemens S7 format