Setup With Different Voltage Classes; Rules - Siemens Logo! Manual

LOGO! installation and wiring
Note
CM EIB/KNX must always be installed as the last module
on the right-hand side of the LOGO! as no further interface
modules may be connected to the CM EIB/KNX.

2.1.2 Setup with different voltage classes

Rules

Digital modules can only be connected to devices of the
same voltage class.
You may connect analog and communications modules to
devices of any voltage class.
You may replace two similar DM8 expansion modules by
one appropriate DM16 expansion module (and vice versa)
without having to change the circuit program.
Note
Two DM8 12/24R may be replaced by one DM16 24R only
if operated with a power supply of 24 V DC.
Two DM8 24R may be replaced by one DM16 24R only if
operated with DC and P action.
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LOGO! Manual
A5E00380835-01