Mitsubishi Electric MELSEC iQ-F Series User Manual page 4

[DESIGN PRECAUTIONS]
WARNING
[Precautions for using products in a UL/cUL Class , Division 2 environment]
*1
with the Cl., DIV.2 mark on the rating plate are suitable for use in Class , Division 2,
● Products
Groups A, B, C and D hazardous locations, or nonhazardous locations only. This mark indicates that
the product is certified for use in the Class , Division 2 environment where flammable gases, vapors,
or liquids exist under abnormal conditions.
When using the products in the Class , Division 2 environment, observe the following conditions to
reduce the risk of explosion.
- This device is open-type and is to be installed in an enclosed area under suitable environment
which requires a tool or key to open.
Warning - Explosion Hazard - Substitution of any component may impair suitability for Class ,
-
Division 2.
- Warning - Explosion Hazard - Do not disconnect equipment while the circuit is live or unless the
area is known to be free of ignitable concentrations.
- Do not open the cover of the CPU module and remove the battery unless the area is known to be
nonhazardous.
*1 Products conforming to the UL explosion-proof standard are as follows:
Manufactured in October 2017 onwards
 FX5 CPU module
FX5UC-32MT/D, FX5UC-32MT/DSS, FX5UC-64MT/D, FX5UC-64MT/DSS, FX5UC-96MT/D, FX5UC-96MT/DSS
 Extension module
FX5-C16EX/D, FX5-C16EX/DS, FX5-C16EYT/D, FX5-C16EYT/DSS, FX5-C32EX/D, FX5-C32EX/DS, FX5-C32EYT/D, FX5-
C32EYT/DSS, FX5-C32ET/D, FX5-C32ET/DSS, FX5-232ADP, FX5-485ADP, FX5-C1PS-5V, FX5-CNV-BUSC, FX5-4AD-
ADP, FX5-4DA-ADP
[DESIGN PRECAUTIONS]
CAUTION
● When an inductive load such as a lamp, heater, or solenoid valve is controlled, a large current
(approximately ten times greater than normal) may flow when the output is turned from off to on. Take
proper measures so that the flowing current does not exceed the value corresponding to the
maximum load specification of the resistance load.
● After the CPU module is powered on or is reset, the time taken to enter the RUN status varies
depending on the system configuration, parameter settings, and/or program size.
Design circuits so that the entire system will always operate safely, regardless of this variation in time.
● Simultaneously turn on and off the power supplies of the CPU module and extension modules.
● If a long-time power failure or an abnormal voltage drop occurs, the programmable controller stops,
and output is turned off. When the power supply is restored, it will automatically restart (when the
RUN/STOP/RESET switch is on RUN side).
2