4.4.1.1
Integrated restart interlock and reset
Prerequisites
•
A reset device, such as a reset pushbutton, is connected.
24 V DC
RES
Figure 21: Electrical diagram of the reset device
Using an integrated restart interlock
The restart interlock is configured once the reset pushbutton has been connected.
When the restart interlock is configured, the application diagnostic output located on
the same plug connector as the reset pushbutton signals when the reset pushbutton
needs to be pressed.
The following applies to the restart interlock:
•
If the protective device is clear once the machine has been switched on or follow‐
ing an interruption, the OSSDs do not switch to the ON state
•
The protective device changes to the reset required state after the light path
becomes clear, a lockout status or after a configuration change
•
If someone presses the reset pushbutton and then lets go of it when the light path
is clear, the OSSDs switch to the ON state
•
The machine may not restart yet. The operator must also press the machine start
button after having pressed the reset pushbutton.
Facilities for connecting
Only one reset pushbutton is allowed to be connected to the active unit of a multiple
light beam safety device.
Facilities for connecting of the reset button on the active unit:
•
M12, 8-pin system connection
•
Connection for reset/override pushbutton
Further topics
•
"Configuring the restart interlock", page 62
4.4.2
External device monitoring (EDM)
Overview
The external device monitoring (EDM) monitors the status of downstream contactors.
The multiple light beam safety device has no internal external device monitoring.
The external switching elements (external device monitoring, EDM) must be inspected
in line with the regulations which apply at the place of installation or the required relia‐
bility of the safety function.
4
PROJECT PLANNING
36
O P E R A T I N G I N S T R U C T I O N S | deTem4 LT Muting A/P
8024802/2020-07-17 | SICK
Subject to change without notice