f ABB Relay Watchdog cycle monitoring relay CM-WDS- A&S Automation Co., Ltd
 
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The watchdog cycle monitoring relay CM-WDS (which is also called watchdog) monitors if a regularly intermitted pulse is applied to its pulse input “I“. It is, for example, possible to connect the output of a programmable logic controller (PLC), which is set and reset regularly (e. g. once each cycle). Now, the CM-WDS monitors if the cycle time of the PLC program is smaller than the cycle monitoring time set at the watchdog cycle monitoring relay. If the pulse signal is missing or is not regular the output relay de-energizes and the red and can be used to reset the PLC.(Main benefits):Reliable monitoring of your programmable equipment(Main features):Four selectable cycle times from 0.5 to 1000 ms\1 c/o contact\LEDs for status indication\24 V DC supply voltage

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