Burkert Type 8645 - Manual (Page 121)

insTallaTion
English
8645 - 121
ExPANSION OF ThE SySTEM OR REPLAcEMENT
OF A MOduLE
If the system is to be expanded or a module replaced, proceed as follows:
Remove the blue connection bracket(s).
Release the  locking pins (modules) by turning to the left (1/4 turn). Note that the  locking pins snap
upwards.
Open the DIN rail mountings or loosen the screws of the wall mounting.
Details, see illlustration: Locking when
mounting on DIN rail (2)
Connection bracket
Illustration: Locking when replacing a module or expanding the system
The module(s) can now be pushed to the right.
Remove the module or insert the new module(s).
Push all the modules together again.
Connect the modules by pressing and subsequently turning (1/4 turn) the  locking pins (modules) to
the right.
Tighten the screws of the DIN rail mounting or wall mounting.
Secure all the modules in the same way.
Fit the blue connection bracket again.