Module Installation; External Wiring - Mitsubishi Electric MELCEC Q Series User Manual

8. EMC AND LOW VOLTAGE DIRECTIVES
8.2.5

Module installation

(1)
8.2.6

External wiring

(1)
(2)
(3)
Reinforced insulation withstand voltage (installation category II, source : IEC 664)
Installing modules contiguously
The left side face of each AnS series I/O module is open. When installing I/O
modules to the base, do not allow any empty slots between modules. If a slot to the
left of a 100/200VAC module is left empty, the circuit board containing the hazardous
voltage circuit is exposed. When a slot needs to be left open, be sure to install the
blank module (A1SG60).
Module power supply and external power supply
For the remote module which requires 24VDC as module power supply,
the 5/12/24/48VDC I/O module, and the special function module which requires the
external power supply, use the 5/12/24/48VDC circuit which is doubly insulated from
the hazardous voltage circuit or use the power supply whose insulation is reinforced.
External devices
When a device with a hazardous voltage circuit is externally connected to the
programmable controller, use a model whose circuit section of the interface to the
programmable controller is intensively insulated from the hazardous voltage circuit.
Reinforced insulation
Reinforced insulation refers to the insulation with the dielectric withstand voltage
shown in the following table.
Rated voltage of hazardous
voltage area
150VAC or less
300VAC or less
Surge withstand voltage (1.2/
50 s)
2500V
4000V
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