Connecting The Logo! Td Power Supply - Siemens LOGO! Manual

LOGO! installation and wiring
2.3 Wiring LOGO!
Circuit protection with AC voltage
To suppress voltage peaks on the power supply lines, you can install a metal oxide varistor
(MOV). Make sure the operating voltage of the varistor (MOV) used lies at least 20 % above
the rated voltage (for example S10K275).
Circuit protection with DC voltage
To suppress voltage peaks on the power supply lines, please install a protection device.
DEHN (order number: 918 402) is recommended.
2.3.2

Connecting the LOGO! TD power supply

The LOGO! TD must be connected to an external power supply that supplies a voltage of 12
V DC or 24 V AC/DC. A power connector is included with the LOGO! TD.
①
Power supply
②
Communication interface
The power connection is non-polar. If you connect a DC power supply to the LOGO! TD, you
can connect the positive supply wire or negative supply wire to either the left or right side.
Note
Siemens recommends that you protect the LOGO! TD with a 0.5 A safety fuse on the power
supply.
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Manual, 10/2017, A5E01248535-AA
LOGO!