485
2020/09
14.3 Plugging and pulling electronics modules
BL20 enables the pulling and plugging of electronics modules without having to disconnect the
field wiring. The BL20 station remains in operation if an electronics module is pulled. The voltage
and current supplies as well as the protective earth connections are not interrupted
14.4 Handling the BL20 economy modules
The BL20 Economy modules use direct push-in contacts different from the BL20 base modules
which use tension clamp contacts. The handling of these direct push-in contacts is described in the
following:
14.4.1 Insertion of the conductor
The conductor is simply pushed into the corresponding contact.
14.4.2 Removal of the conductor
The conductor can be removed from the contact by pressing the release mechanism, e. g. with a
screw driver.
ATTENTION
Interruption of the module bus communication
Non-defined states of in- and outputs
† Do not plug or pull modules under load.
Fig. 322: Insertion of the conductor
Fig. 323: Removal of the conductor
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