SICK ReLy EMSS3

Table 2: Switching behavior of application diagnostic output Y1
State of enabling current paths State of application diagnostic output Y1
Closed 0 V (NPN)
Open 24 V (PNP)
Application diagnostic output Y2
Applic
ation diagnostic output Y2 outputs the “Reset required” signal with a frequency of
1 Hz, e.g. for the connection of a signal lamp.
4.4.3 Restart interlock
Important information
DANGER
H
azard due to unexpected starting of the machine
Death or severe injury
b
If you connect the safety relay to an emergency stop pushbutton, you must use the
restart interlock.
Restart interlock
A r
eset pushbutton must be connected to allow the restart interlock to be used. The
reset pushbutton must be attached outside of the hazardous area. It must not be possi‐
ble to access the reset pushbutton from inside the hazardous area. The entire haz‐
ardous area must be highly visible for all operators from the reset pushbutton.
Further topics
•
"Device connection", page 19
4.4.4 External device monitoring (EDM)
External device monitoring (EDM)
W
ith static external device monitoring, the safety relay tests whether the controlled
actuators (contactors) have dropped out when the device is switched on.
Further topics
•
"Device connection", page 19
4 P
ROJECT PLANNING
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O P E R A T I N G I N S T R U C T I O N S | ReLy EMSS3 8023937/2019-10-11 | SICK
Subject to change without notice