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KL3444, KS3444, KL3448, KS3448 | 4-, 8-channel analog input terminals 0…20 mA

The KL3444 and KL3448 analog input terminals process 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 Bus Terminal, the four inputs are 2-wire versions and have a common ground potential. The reference ground of the inputs is the internal ground. The KL3448 variant combines eight channels in one housing and is particularly suitable for space-saving installation in control cabinets. The use of single conductor connection technology enables the connection of multi-channel sensor technology with minimum space requirements. The reference ground for all inputs is the 0 V power contact. In both Bus Terminals the power contacts are connected through. Overload is detected in both variants. 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 KL3448, KS3448
Number of inputs 4 8
Power supply via the K-bus
Signal current 0…20 mA
Technology single-ended
Internal resistance max 85 Ω
Common-mode voltage UCM
Conversion time ~ 2 ms ~ 4 ms
Resolution 12 bits
Measuring error max ±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 consumpt. K-bus typ. 85 mA typ. 105 mA
Bit width in the process image input: 4 x 16 bit data (4 x 8 bit control/status optional) input: 8 x 16 bit data (8 x 8 bit control/status optional)
Configuration no address or configuration setting
Special features high packing density
Weight approx. 75 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 60068-2-27/29
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