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9
EMC, LOW VOLTAGE, AND MACHINERY DIRECTIVES
9.2 Requirement to Conform to the Low Voltage Directive
9.2.5 External wiring
9 - 12
9
EMC AND LOW
VOLTAGE
DIRECTIVES
10
LOADING AND
INSTALLATION
11
MAINTENANCE AND
INSPECTION
12
TROUBLESHOOTING APPENDICES INDEX
9.2.5 External wiring
(1) 24VDC external power supply
This power supply must include a reinforced insulation for 24VDC circuit to prevent
dangerous voltage for CC-Link Safety remote I/O module.
(2) External devices
When a device with a hazardous voltage circuit is externally connected to the
programmable controller, use the device whose interface circuit section to the
programmable controller has the reinforced insulation against the hazardous voltage
circuit.
(3) Reinforced insulation
The reinforced insulation covers the withstand voltages shown in Table9.4.
Table9.4 Reinforced Insulation Withstand Voltage
(Installation Category II, source : IEC664)
Rated voltage of hazardous
voltage area
Surge withstand voltage
(1.2/50 s)
150VAC or below 2500V
300VAC or below 4000V