Appendix 9 General Safety Requirements; When The Err. Contact Of A Power Supply Module Is Not Used - Mitsubishi Electric MELSEC iQ-R Series User Manual

Appendix 9
When turning the power of this product OFF and ON, the control output may not be performed temporarily due to differences
in the delay and startup time between the power supply for this product and the external power supply (especially, DC power)
for the control module.
In addition, signals also may not be output correctly when the external power supply or this product fails. In terms of fail-safe
and to prevent any incorrect output signals from causing the entire system failure, configure safety circuits (such as
emergency stop circuits, protection circuits, and interlock circuits) external to this product for the parts where the incorrect
output may cause damage to the machines or accidents.

When the ERR. contact of a power supply module is not used

AC power
Power supply
Transformer
Fuse
MELSECWinCPU
module
User program Ò
Start switch
RA1
MC
MC Stop switch
Input module
Output module
Ym
L
Yn
RA1
Output module
MC
MC2
MC1
MC1
MC2
*1 This product starts when RA1 (control starting output) turns ON.
*2 A stop caused by pressing an emergency stop switch or a limit switch
*3 Configure external interlock circuits for conflicting operations such as forward/reverse rotations and the parts where the incorrect output
may cause damage to the machines or accidents.
General Safety Requirements
AC and DC power
Power supply
Transformer
Start/Stop circuit*1
Start switch
MC Stop switch
Low battery alarm
(lamp or buzzer)
Turns ON at the start of
the MELSECWinCPU
module user program.
Output module
MC
Turns the power of output
devices OFF when the stop
switch is pressed.*2
Output module
Interlock circuits*3
Transformer
Fuse Fuse
DC power
MELSECWinCPU
module
(-) (+)
Fuse
User program Ó
RA1
MC
RA2
Input module
RA2
XM
Ym
L
Yn
RA1
MC MC
MC2
MC1
MC1
MC2

Appendix 9 General Safety Requirements

Use of a voltage relay is recommended.
Low battery alarm
(lamp or buzzer)
Turns ON at the start
of MELSECWinCPU
module user program.
Turns the power of output devices
OFF when the stop switch is
pressed.*2
APPX
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