Installing And Wiring Logo - Siemens LOGO! 24RC Manual

2 Installing and Wiring LOGO!

General guidelines
You should keep to the following guidelines when you
install and wire your LOGO!:
Ensure that you comply with all the valid and mandatory
standards when wiring your LOGO! device. You should
also heed any national and regional regulations when
installing and operating the devices. Contact the rele-
vant authorities to find out the standards and regula-
tions that apply in your specific case.
Use wires with the appropriate cross-section for the
amount of current involved. You can wire LOGO! using
wires with a cross-section of between 1.5 mm
2.5 mm
Don't screw the connectors too tightly. The maximum
torque is 0.5 Nm (see Section 2.2).
Keep wiring distances as short as possible. If longer
wires are necessary, a shielded cable should be used.
You should lay wires in pairs: a neutral conductor to-
gether with a phase conductor or signal conductor.
Isolate AC wiring and high-voltage DC wiring with rapid
operating sequences from low-voltage signal wiring.
Ensure that the wires have the required strain relief.
Provide suitable overvoltage protection for wires that
could be vulnerable to lightning.
Do not connect an external power supply to an output
load parallel to a DC output. This can result in reverse
current at the output unless you have a diode or a simi-
lar block in your configuration.
8
2
(see Section 2.2).
2
and
LOGO! Manual
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