• Dual-channel monitoring
• Cross-connection detection
• Start buton
• Monitoring of external contactors (EDM)
Note: All example applications shown are proposals without warranty. In any case the operator has
to perform a safety review of the entire site.
When the emergency stop button is pushed or the cable-pull switch is activated, the EP-19xx
switches off the 24 V supply for the modules (switchable modules refer to the section, General
Contact Information) within the safety segment and thus also contactors K3 and K4. The failure of a
switching element in the emergency stop button or the cable-pull switch as well as a cross-circuit in
their supply lines does not result in the failure of the emergency stop mechanism and is detected
within the fault-reaction time.
The EP-19xx module switches on the 24-V supply for the modules within the safety segment if:
• Emergency button is unlocked
• Cable-pull switch is unlocked
• Feedback circuit (NC contacts of K3 and K4) is closed
• Start push button has been pushed and released again
Contactors K3 and K4 are controlled by the PLC and can switch on as soon as the EP-19xx has
switched on the 24-V supply.
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