1-channel loop-powered input terminal 4…20 mA KL3051
Run LED 1
Error LED 1
+Input 1
+24 V
0 V
0 V
Top view 
Contact assembly 
extended shock and vibration range

KL3051 | 1-channel loop-powered input terminal 4…20 mA

The job of the KL3051 analog input terminal is to supply power to measuring transducers located in the field and to transmit analog measurement signals with electrical isolation to the automation device. The voltage for the sensors is supplied to the terminal via the power contacts. The power contacts can optionally be supplied with operating voltage in the standard way or via a power feed terminal (KL9xxx) with electrical isolation. The input electronics is independent of the supply voltage of the power contacts. The 0 V rail is the reference potential for the inputs. The run LEDs give an indication of the data exchange with the Bus Coupler. The error LEDs indicate an overload condition and a broken wire.

Technical data KL3051 | KS3051
Number of inputs 1
Power supply 24 V DC via power contacts
Signal current 4…20 mA
Technology single-ended
Internal resistance 80 Ω + 0.7 V
Common-mode voltage UCM
Resolution 12 bit
Conversion time ~ 1 ms
Measuring error < ±0.3 % (relative to full scale value)
Surge voltage resistance 35 V max.
Electrical isolation 500 V (K-bus/signal voltage)
Current consumption power contacts only load
Current consumption K-bus typ. 65 mA
Bit width in the process image input: 1 x 16 bit data (1 x 8 bit control/status optional)
Configuration no address or configuration setting
Special features with sensor supply
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 CE, UL, Ex, GL
Special terminals
KL3051-0050 Siemens S7 format