Cycle monitoring terminal (watchdog) KL2692
Input 2
Relay 2
Input 1
Watchdog enable 
Watchdog, OK 
Relay 1 
Power contact
+24 V
Power contact 0 V
24 V
Input 1
Watchdog enable
0 V
Input 2
Top view 
Contact assembly 

KL2692 | Cycle monitoring terminal (watchdog)

The KL2692 Bus Terminal monitors a bit that is toggled by the controller during each cycle. If the toggle signal fails, the controller switches off two potential-free relay circuits in order to prevent damage to the machine. Failure of the toggle signal may be caused by the PLC cycle stopping, by a fault in the bus cable or connector, or by a fault in a bus device. The cycle monitoring time can be parameterised. The Bus Terminal has an enable input that enables the relay to be switched on if a correct toggle signal is detected.

Technical data KL2692 | KS2692
Connection technology 2-wire
Number of outputs 2 potential-free relay outputs (normally-open contacts)
Number of inputs 2 digital 24 V inputs
Rated load voltage 30 V DC
Max. output current 3 A per channel
Ohmic switching current 5 A AC/DC per channel
Inductive switching current 2 A AC/DC per channel
Minimum permitted load 10 mA at 5 V DC
Electrical isolation 500 V (K-bus/field potential)
Current consumption power contacts
Current consumption K-bus typ. 165 mA
Bit width in the process image 2 x 8 bit data, 1 x 8 bit control/data
Operating cycles mech. (min.) 2 x 107
Operating cycles electr. (min.) 1 x 105 (5 A/30 V DC)
Configuration via the Bus Coupler or the controller
Weight approx. 60 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
Product announcement
KL2692: available
KS2692: estimated market release on request