Chapter 10. INSTALLATION AND WIRING
10 - 4
10.1.2 Handling Instructions
To installing the temperature-measuring resistor input module, be sure to check the following:
•
Do not drop it off, and make sure that strong shock should not be applied.
•
Do not unload the PCB from its case. It can cause faults.
•
During wiring, be sure to check any foreign matter like wire scraps should not enter into the upper side of the
PLC. If any foreign matter has entered into it, always eliminate it.
•
Do not load or unload the module while the power supply is being connected.
1) I/O module handling instructions
The followings explains instructions for handling or installing the input module.
(1) I/O module specifications re-check
Re-check the input voltage for the input module. If a voltage over the maximum switching capacity is
applied, it can cause faults, destruction or fire.
(2) Used wire
Select the wire with due consideration of ambient temperature and rated current. Its minimum
specifications should be AWG22(0.3 mm
2
) or more.
(3) Environment
When wiring the I/O module, if it locates near a device generating an cause short circuit, destruction or
malfunction.
(4) Polarity
Before applying the power to a module that has polarities, be sure to check its polarities.
(5) Wiring
•
Wiring I/O wires with high voltage cable or power supply line can cause malfunction or disorder.
•
Be sure that any wire does not pass across during input LED (I/O status will not be clearly identified.
•
If an inductive load has been connected to output module, connect parallel surge killer or diode to a
load. Connect the cathode part of diode to the
+
part of the power supply.
