Environmental Condition For Mounting Plc On Panel - Fuji Electric MICREX-SX series SPF User Manual

Section 4 Installation and Wiring

4-1-4 Environmental condition for mounting PLC on panel

Use this PLC in the environment described below.
High temperature, high humidity, condensation, dust, corrosive gases, oil, organic solvents, excessive vibration or shock
might cause electric shock, fire, erratic operation or failure.
Keep an open space around the PLC as shown below to obtain sufficient ventilation, otherwise, abnormal temperature
rise or failure occurs.
FUJI PLCs are reliable because they provide excellent resistance against environmental conditions. Note that system reliability
and operational safety can be further improved by observing the following precautions.
Item Specifications
Temperature
• The PLC must be operated in the environment from
0 to 55°C according to specification of components.
• The PLC should not be installed where it will be
exposed to direct sunlight.
Humidity • The relative humidity must be from 20 to 95%.
• Condensation due to sudden temperature changes
must be avoided.
Vibration
• 19.6 m/s
Shock
2
• 98 m/s
Atmosphere
• Corrosive gases must be prevented.
PLC layout 1) Keep all units at least 100mm apart vertically. Otherwise, excessive temperature rise may occur.
2) Keep units at least 50mm away from other devices and the building structure to ensure appropriate
ventilation.
3) Heat-generating devices (heaters, transformers and resistors) must not be installed directly under the PLC.
4) The PLC must be isolated (shielded) from high-voltage devices, high-voltage cables and power equipment
as far as possible. PLC I/O cables must not be run parallel with the cables for those devices.
5) The PLC must be installed in a vertical position. Installing the PLC on a level (as shown in illustration below)
will cause adverse thermal affects on the device.
Front view
Other
device
2) 50mm
2
(screw mounting)
(rail mounting)
Expan-
PLC
sion
Main unit
unit
Other
Other device
device
3) Heat generating
device
Caution
Remarks
• To maintain the ambient temperature within the
specified range, a fan or air-conditioner must be
introduced in case of excessively high ambient
temperature or a heater must be installed in the
panel in case of excessively low ambient temperature.
• In winter, condensation may be caused by
temperature change when a room-heater is turned
ON and OFF. This condition must be avoided by
leaving the room-heater on even during the night or
by other measures.
• In case of excessive vibration, secure the panel with
vibration-absorbing rubber or reduce vibration by
improving the building structure and floor strength.
• If there are harmful gases, air-purging inside the
panel must be introduced. (air-filteration)
4)
High
voltage
device
4-5
Side view
Other
device
2)
50mm
5) PLC
Floor surface
PLC