7
2541786-01-10/20 (Translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTM-CBI-BP
EN
3. Description of the safety function
Devices from this series feature the following safety functions:
With active guard lock monitoring, the following applies:
Monitoring of guard locking and the position of the guard
(interlocking device with guard locking according to EN ISO 14119)
Ì
6.11. Switching states on page 11
):
-The safety outputs are switched off when guard locking is released (monitoring of the locking element).
Important:
This applies only if guard lock monitoring is active!
-The safety outputs are switched off when the guard is open.
-Guard locking can be activated only when the bolt tongue is located in the locking module (prevention of inad-
vertent locking position (faulty closure protection)).
Ì
Safety characteristics: category, Performance Level, PFH
D
(see chapter
Control of guard locking
Ì
Safety function
If the device is used as guard locking for personnel protection, control of guard locking must be regarded as a
safety function.
The safety level of guard locking control is determined by the device PFHD
int.
and by the external control (e.g.
PFHD
ext.
of the standstill monitor).
PFHD
ext.
PFHD
int.
(internal electronic)
Guardlocking Device
(e.g. standstill
monitor)
(locking mean)
Ì
Safety characteristics: category, Performance Level, PFH
D
(see chapter
Releasing the guard locking
Ì
Safety functions
-Guard locking remains activated until IMP requests releasing the guard locking.
The decisive criterion for a possible request to deactivate guard locking is a voltage of at least 5 V between the
inputs IMP and 0 V or between IMP and IMM.
The external control system must recognize and react to short circuits on these control signals. Fault exclusion,
e.g. by laying the cables with protection, can be considered as an alternative.
Voltage disconnection must apply to the machine (control system and device).
With inactive guard lock monitoring, the following applies:
Monitoring of the guard position
(interlocking device according to EN ISO 14119)
Ì
Safety function: The safety outputs are switched off when the guard is open (see chapter
Ì
Safety characteristics: category, Performance Level, PFH
D
(see chapter