Description Of The Safety Function - EUCHNER CTP-L1-BR Unicode Operating Instructions Manual

3. Description of the safety function

Devices from this series feature the following safety functions:
Monitoring of guard locking and the position of the guard
(interlocking device with guard locking according to EN ISO 14119)
Safety function (see chapter 6.5. Switching states on page 12):
Ì
- The safety outputs are switched off when guard locking is released (monitoring of the locking element).
- The safety outputs are switched off when the guard is open (monitoring of the door position).
- Guard locking can be activated only when the actuator is located in the switch head (prevention of inadvertent locking
position (faulty closure protection)).
- The following additionally applies in a BR series connection: the safety outputs are switched on only when the device
receives a corresponding signal from its predecessor in the chain.
Safety characteristics: category, Performance Level, PFH
Ì
NOTICE
You can regard the complete BR device chain as one subsystem during calculation. The following
calculation method applies to the PFH
#1
PFH
D,1
Alternatively, the simplified method according to section 6.3 of EN 13849-1:2015 can be used for
calculation.
Control of guard locking for variants with IMP/IMM connection
If the device is used as guard locking for personnel protection, control of guard locking must be regarded as a safety function.
The device does not feature a safety characteristic for control of guard locking, because the guard locking solenoid is
completely disconnected from outside the device (no control function within the device). It therefore does not contribute to
the failure probability.
The safety level for control of guard locking is defined only by the external control (e.g. PFH
Guardlocking Device
PFH D
ext.
(e.g. standstill
(locking mean)
monitor)
Control of guard locking via IO-Link communication
If the device is used as guard locking for personnel protection, control of guard locking must be regarded as a safety function.
The device does not feature a safety characteristic for the control of the guard locking.
MAN20001654-01-03/23 (translation of the original operating instructions)
Transponder-Coded Safety Switch CTP/CTA-L1/2-BR
D
value:
D
BR-Device #1 ... n
#2 #n
PFH PFH
D,2 D,n
n
PFH ges =∑ PFH + PFH
D D,k
k=1
(see chapter 16. Technical data on page 39).
External Evaluation
(e.g. PLC)
PFH
D,ext
D,ext
Operating Instructions
for the standstill monitor).
D, ext.
EN
7