Operating Instructions
Transponder-Coded Safety Switch CTM-L2-AS1B
6
(translation of the original operating instructions) 2539116-02-09/21
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)
Ì
6.2. Switching states on page 9
-When guard locking is released, no valid code sequence is sent (monitoring of the locking device).
-When the guard is open, no valid code sequence is sent (monitoring of the door position).
-Guard locking can be activated only when the actuator is located in the switch (prevention of inadvertent locking posi-
tion (faulty closure protection)).
1)
Ì
Safety characteristics: category, Performance Level, PFH
D
(see chapter
).
Activation of guard locking by switching on/off the auxiliary voltage
If the device is used as guard locking for personnel protection, the control of the 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 via the auxiliary power (no control function within the device). It therefore
does not contribute to the failure probability.
The safety level for the control of the guard locking is defined only by the external control (e.g. PFH
D ext.
for the standstill
monitor).
Guardlocking Device
PFHD
ext.
(e.g. standstill
monitor)
(locking mean)
Auxiliary voltage
Control via ASi bit D0 (only for process protection) in conjunction with auxiliary voltage
Because control is via the non-safe bit D0, this control is only allowed to be used for process protection.
Guardlocking Device
PFHD
ext.
(e.g. standstill
monitor)
(locking mean)
Control via ASi Bit D0
in conjunction with auxiliary voltage
1) Limited prevention of inadvertent locking position (faulty closure protection) on Power Up.
