Chapter 11 Installation and Wiring
11-4
11.1.2 Handling Precautions
Here describes the notices in handling from the opening of each module to installation.
•
Do not fall or apply the deep impact.
•
Do not remove PCB from the case. It may cause the failure.
•
Cares should be taken so that foreign materials such as wiring fragments are not entered into the upper
part of module. If entered, remove it.
1) Notices in Handling I/O Module
Here describes the notices for the cases of handling or installing I/O module.
(1) Recheck of I/O module specification
For input module, you must consider input voltage and for output module, if the voltage exceeding
max. open/close capacity is applied, it may cause the failure, destroy or fire.
(2) Use cable
Cable shall be selected considering ambient temperature and allowable current and min. spec. of
cable should be more than AWG22(0.3mm
2
).
(3) Environment
In case of wiring I/O module, if it is too close to the equipment with high heat or the wiring is directly
touched to the oil for a long time, it may cause the short circuit or occur the breakage or abnormal
operation.
(4) Polarity
For the module having the polarity in terminal block, it is required to check the polarity before applying
the power.
(5) Wiring
•
In case of wiring that I/O wiring is carried out with high voltage cable or power cable, it may occur the
inductive disturbance which result in abnormal operation or failure.
•
Do not allow the cables to pass in front of I/O operation indicator (LED).
(It is not possible to distinguish I/O indicator correctly.)
•
In case that the inductive load is connected to output module, connect the surge absorber or diode
to the load in parallel. The cathode of diode shall be connected to (+)pole of power.
OUT
COM
Output Module
Inductive load
Surge absorber
OUT
COM
Output Module
Inductive load
Diode
+
-