IDEC SmartRelay Manual 17
2
IDEC SmartRelay installation
and wiring
General guidelines
Please note the following guidelines for installing and w
iring
your IDEC SmartRelay:
• Always ensure that the wiring of your IDEC SmartRelay
is compliant with current ru
les and 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.
• 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 can wire IDEC
SmartRelay with cable conductor cross-sections from
1.5 mm
2
to 2.5 mm
2
; see Chapter 2.3.
• Do not exceed the screw torque
of the terminals. The
maximum torque is: 0.5 Nm, see Chapter 2.3.
• Keep the cabling as short as possible. If longer cables are
necessar
y, you should use shielded versions. You should
always route your cables in pairs: i.e. one neutral
conductor plus one phase conductor or signal line.
• Always keep separate:
- The AC wiring
- High-vo
ltage DC circuits with high-frequency
switching cycles
- Low-voltage signal wiring
• Ensure that the wires are installed with
appropriate strain
relief.
• Provide a suitable lightning surge ar
rester for cables
installed in hazardous areas.
• Do not connect an external power supply in parallel to the
output
load of a DC output. This could develop a reverse
current at the output if you have not installed a diode or
similar barrier device.
• Reliable functioning of the equipment is only ensured with
certified compon
ents!
Note
IDEC SmartRelay devices may only be installed and wired by
skilled personnel who are familiar with and follow general
engineering rules and relevant regulations and standards.
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