3. Installation
page 16
ELC PE22B-PE35B V1.0-05.19-GB
Subject to technical alterations
3.4.
Comments on the safety functions of the ELC
ELC with PROFIBUS feature two
safety circuits, as shown
schematically in the picture on
the left :
Safety relay K1 with feedback
via the normally closed contact
(paragraph 3.4.1)
Monitoring of the initialisation
signal (paragraph 3.4.2
3.4.1.
Safety relay
To set the ELC ready for operation, the safety relay K1 has to be activated by ap24V to
pin X1.3 and GND on pin X2.3.
As long as the safety relay is not activated, lamp operation is not possible! There are two
feedback paths:
a normally closed relay contact. It may be tapped on pins X2.1 and X2.2.
the [Warning Register] of the PROFIBUS-input-data (see below and paragraph 5.3: Bit 4 {Safety
Relay Open})
If the safety relay is deactivated during lamp operation, lamp operation will be shut down. After
reactivating the safety relay, the lamp has to be restarted.
3.4.2.
Initialisation signal
Furthermore lamp operation will not be allowed 24V are applied to pin X1.1 and GND
on pin X1.2. This is an additional monitoring function for the safe operation of the installation.
The status of pin X1.1 is visualized in the [Warning Register] of the PROFIBUS-input-data (see
below and paragraph 5.3: Bit 7 {Init Signal Ok}).
If the initialisation signal is deactivated during lamp operation, lamp operation will be shut
down. After re-applying the initialisation signal, the lamp has to be restarted.
