Connecting Logo!; To Connect Logo! To The Power Supply; Circuit Protection With Ac Voltage - Siemens Logo! Manual

Note
A power failure may cause an additional edge triggering
signal at the special functions, for example.
Data of the last uninterrupted cycle are stored in LOGO!.

Connecting LOGO!

To connect LOGO! to the power supply:

LOGO! .....
with DC power supply
L+
M
L+ M I1
Protection with safety fuse
if required (recommended) for:
12/24 RC...:
24:
EIB/KNX
Note
LOGO! is a double-insulated switchgear. It is not required
to connect an equipment grounding conductor.

Circuit protection with AC voltage

To suppress voltage peaks on the power supply lines, you
can install a metal oxide varistor (MOV) (MOV). Make sure
that the operating voltage of the varistor (MOV) used lies at
least 20 % above the rated voltage (for example S10K275).
LOGO! Manual
A5E00380835-01
I2 I3 I4 I5
0.8 A
2.0 A
0.08 A
LOGO! installation and wiring
LOGO! .....
with AC power supply
L1
N
L1 N I1
To suppress surge voltages,
install varistors (MOV) with an
operating voltage at least 20 %
above the rated voltage.
I2 I3 I4
31