HD Bus Terminal, 16-channel digital input 24 V DC, 0 V (ground) switching KL1889
Signal LEDs
Signal LEDs
Power contact
+24 V
Power contact 0 V
Input 1 
Input 2 
Input 3 
Input 4 
Input 5 
Input 6 
Input 7 
Input 8 
Input 9
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
Input 16
Top view 
Contact assembly 
extended shock and vibration range

KL1889 | HD Bus Terminal, 16-channel digital input 24 V DC, 0 V (ground) switching

The KL1889 digital input terminal acquires the binary control signals from the process level and transmits them, in an electrically isolated form, to the higher-level automation device. The Bus Terminal contains 16 channels, whose signal states are displayed by LEDs. The terminal is particularly suitable for space-saving use in control cabinets. By using the single-conductor connection technique, a multi-channel sensor can be connected in the smallest space with a minimum amount of wiring. The power contacts are looped through.

The KL1889 Bus Terminal takes the 24 V power contact as its reference for all inputs. The conductors can be connected without tools in the case of solid wires using a direct plug-in technique.

The HD Bus Terminals (High Density) with increased packing density feature 16 connection points in the housing of a 12 mm terminal block.

Technical data KL1889
Connection technology 1-wire
Specification negative switching
Number of inputs 16
Nominal voltage 24 V DC (-15 %/+20 %)
“0“ signal voltage 18…30 V
“1“ signal voltage 0…7 V
Input filter typ. 3.0 ms
Input current typ. 3 mA
Current consumpt. K-bus typ. 20 mA
Current consumption power contacts typ. 4 mA + load
Electrical isolation 500 V (K-bus/field potential)
Bit width in the process image 16 inputs
Configuration no address or configuration setting
Conductor types solid wire, stranded wire and ferrule
Conductor connection solid wire conductors: direct plug-in technique; stranded wire conductors and ferrules: spring actuation by screwdriver
Rated cross-section solid wire: 0.08…1.5 mm²; stranded wire: 0.25…1.5 mm²; ferrule: 0.14…0.75 mm²
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 (see documentation)
Approvals CE, UL, Ex, GL