Logo! Installation And Wiring - Siemens LOGO! Series Manual

LOGO! installation and wiring

General guidelines
Please note the following guidelines for installing and wiring your LOGO!:
● Always ensure that the wiring of your LOGO! is compliant with current rules and
● Always switch off power before you wire or install/remove a module.
● Always use cables with appropriate conductor cross-sections for the relevant current. You
● Do not exceed the screw torque of the terminals. The maximum torque is: 0.5 Nm.
● Keep the cabling as short as possible. If longer cables are necessary, you should use
● Always keep separate:
● Ensure that the wires are installed with appropriate strain relief.
● Provide a suitable lightning surge arrester for cables installed in hazardous areas.
● Do not connect an external power supply in parallel to the output load of a DC output.
● Reliable functioning of the equipment is only ensured with certified components!
LOGO!
Manual, 04/2011, A5E03556174-01
standards. Also, conform with all national and regional regulations when you install and
operate the devices. For information on standards and regulations that apply to your
specific case, contact your local authorities.
can wire LOGO! with cable conductor cross-sections (Page 46) from 1.5 mm
shielded versions. You should always route your cables in pairs: i.e. one neutral
conductor plus one phase conductor or signal line.
– The AC wiring
– High-voltage DC circuits with high-frequency switching cycles
– Low-voltage signal wiring
– The EIB bus cable may also be laid in parallel to other signal lines
This could develop a reverse current at the output if you have not installed a diode or
similar barrier device.
Note
LOGO! devices may only be installed and wired by skilled personnel who are familiar with
and follow general engineering rules and relevant regulations and standards.
2
to 2.5 mm .
2 2
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