User Manual

LOGO! installation and wiring
2.3 Wiring LOGO!
LOGO!
Manual, 06/2014, A5E33039675
39
Circuit protection with DC voltage
To suppress voltage peaks on the power supply lines, install a protection device, for example
DEHN (order number 918 402).
2.3.2
Connecting the LOGO! TDE power supply
You must connect the LOGO! TDE to an external power supply that supplies a voltage of
12 VDC or 24 VAC/VDC. The LOGO! TDE includes a power connector. Connect the power
supply to the power connector then plug the power conncetor to the power supply interface
on LOGO! TDE.
①
Ethernet interfaces
②
Power supply
•
The power connection is non-polar. If you connect a DC power supply to the LOGO!
TDE, you can connect the positive supply wire or negative supply wire to either pin 1
or pin 2.
•
Pin 3 must be connected to the ground.
Note
Siemens recommends that you protect the LOGO!
TDE with a 0.5 A safety fuse on the
power supply.
2.3.3
Connecting LOGO! inputs
Requirements
At the inputs you connect sensor elements such as: momentary pushbuttons, switches, light
barriers, daylight control switches etc.