EUCHNER CETx-AR-xxx-AH-xxx (Unicode) - Manual (Page 37)

Operating Instructions Safety Switch CET.-AR-...-AH-...
37
Teach-in function for series connection
It is recommended not to teach in the actuators in the series connection but to
teach them in one by one instead. Teach-in in a series connection works analo-
gously to individual operation in principle. All switches in the chain can be taught
in at the same time. The prerequisite is that the switch chain functions without
errors and the following
steps are complied with. Further steps might have to observed for mixed switch
chains (e.g. for chains with CES and CET). Observe the operating instructions for
the other devices in the chain for this purpose.
Proceed as follows:
1. Mount the switches and actuators and prepare them for the teach-in process
(see page 36).
2. Close all safety doors in the chain.
3. Switch on the power supply and activate the guard locking.
¨ The green LED STATE fl ashes at approx. 1 Hz on the safety switches and the
associated actuators are taught in. This happens for approx. 1 minute. Do not
switch off during this time and do not actuate reset. The teach-in operation has
ended when all LEDs on the safety switches are off.
4. Actuate the reset for at least 3 s (24 V on RST).
¨ The system restarts and then functions in normal operation.
Replacing and teaching-in device
Work on the wiring (e.g. during device replacement) should generally be performed
in a de-energized state. On certain systems, it is nevertheless necessary to perform
this work and subsequent teach-in during ongoing operation.
Input RST must be connected as shown in Figure 12 to permit this.
Proceed as follows:
1. Open the safety door on which the switch or actuator is to be replaced.
2. Mount the new switch or actuator and prepare it for the teach-in process
(see p. 36).
3. Close all safety doors in the chain and activate the guard locking.
4. Actuate the reset for at least 3 s (24 V on RST).
¨ On the safety switch that is positioned at a new actuator, the green LED flashes
at approx. 1 Hz and the actuator is taught-in. This happens for approx. 1 min-
ute. Do not switch off during this time and do not actuate reset. The teach-in
operation has ended when all LEDs on the device are off.
5. Actuate the reset for at least 3 s (24 V on RST).
¨ The system restarts and then continues to function in normal operation.