190
APPX
Appendix 8 General Safety Requirements
When the ERR contact of the power supply module is used
*1 Set a time required for DC power supply to be established.
*2 The programmable controller starts when RA1 (run monitor relay) turns on.
*3 The output devices are turned off at an emergency stop, a stop caused by a limit switch, or ERR
contact OFF.
*4 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.
MC
RA1 RA3
RA2
XM
Ym
Yn
MC2
MC1
M10
N0
MC MC
SM52
SM403
XM
TM
MC
RA2
L
MC1
RA1
MC2
Ym
TM
MC1 N0 M10
(-) (+)
Yn
ERR
RA3
Use of a voltage relay is recommended.
Low battery alarm (Lamp or buzzer)
This relay turns on when the CPU
module starts running by SM403.
Power supplied to the output devices is
shut off when the stop switch is pressed.
*3
Power supply
Transformer Transformer
Fuse Fuse
Fuse
CPU module
Start
switch
Stop
switch
Program
Input module
Output module
Output module
DC
power
Set a TM value.
*1
A signal is
input when
the DC power
connection is
established.
Power
supply
module
This relay turns off when the ERR
contact turns off (a stop error occurs).
Interlock circuits
*4
Start/Stop circuit
*2
AC and DC power
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