EUCHNER CES-AR-AES-12 - Manual (Page 12)

Operating Instructions AR Evaluation Unit CES-AR-AES-12
12
If a feedback loop is not to be connected, a jumper must be fitted to the terminals
Y1 and Y2 (see Figure 7).
CES-AR-AES
33 43 23 13
Y2 Y1 24 34 44 14
+24 V
Subsequent
devices
(e.g. contactors)
Fig. 7: Safety contacts connected and jumper on the feedback loop
The following conditions must be met for the safety contacts to be closed:
For manual start
Ì The feedback loop is closed
Ì The start button has been pressed and released (switches on falling edge)
Ì All safety doors closed
For automatic start
Ì The feedback loop is closed
Ì All safety doors closed
If the feedback loop is open, the DIA LED flashes and the STATE LED is lit (see
section Troubleshooting). The monitoring output DIA is set.
The safety contacts remain open if the feedback loop is open at the start. The unit
switches to fault state, the DIA LED illuminates, and the STATE LED flashes (see
section Troubleshooting).