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20. EMC AND LOW VOLTAGE DIRECTIVES
20.2.5 Module installation
(1) Installing modules contiguously
The left side face of each QnA 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 (AG60).
When using the A5 B expansion base with no power supply, attach the included
cover to the side of the leftmost module.
20.2.6 Grounding
There are two kinds of ground terminals as shown below. Either ground terminal must be
used grounded.
Be sure to perform protective grounding to ensure the safety.
20.2.7 External wiring
(1) 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.
(2) External devices
When a device with a hazardous voltage circuit is externally connected to the PLC,
use a model whose circuit section of the interface to the PLC is intensively insulated
from the hazardous voltage circuit.
(3) Reinforced insulation
Reinforced insulation refers to the insulation with the dielectric withstand voltage
shown in Table 1.
Protective grounding
: Ensures the safety of the PLC and improves the noise
resistance.
Functional grounding
: Improves the noise resistance.
Reinforced Insulation Withstand Voltage (Installation Category II, source : IEC664)
Rated voltage of hazardous voltage area
Surge withstand voltage (1.2/50 s)
150VAC or less
2500V
300VAC or less
4000V
Summary of Contents for Q2ACPU
Page 1: ......
Page 2: ......
Page 221: ...12 12 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Page 222: ...12 13 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Page 237: ...12 28 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU MEMO ...
Page 271: ...16 13 16 POWER SUPPLY MODULE 4 Names and description of parts of the A66P ...
Page 343: ...21 21 13 MAINTENANCE AND INSPECTION 21 4 2 Replacement of the fuse for an output module ...
Page 357: ...22 12 22 TROUBLESHOOTING ...
Page 359: ...22 14 22 TROUBLESHOOTING MEMO ...
Page 429: ...App 32 APPENDICES Trigonometric function Classification Symbol Description ...
Page 537: ...App 140 APPENDICES REMARK 1 Message 1 An error code is displayed in 2 Alert 1 3 Alert 2 ...
Page 539: ...App 142 APPENDICES 2 Q2ACPU Q2ACPU S1 modules Unit mm inch ...
Page 541: ...App 144 APPENDICES 2 A66P power supply module Unit mm inch ...
Page 543: ...App 146 APPENDICES 3 A35B base unit 4 A38B A38HB A38HBEU base unit Unit mm inch Unit mm inch ...
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