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Example 2
S2
S1
SC
FR-D700
START
+24V
K1
CPU
X0 X1
COM0 COM1
24G
Internal
Safety
Circuit
XS0 XS1 Z10 Z00 Z20
Z11 Z01 Z21
K2
DC24V
RUN (SAFE2)
QS90SR2SN-Q
MITSUBISHI MELSEC Safety relay module
Gate
Driver
Gate
Driver
SE
STF
STOP
STF
STOP
PC*
+24V
+24V
GG
* If the control logic is SINK logic, the common
terminal is terminal SD.
R/L1 S/L2 T/L3
U V W
IM
IGBTs
Emergency
stop button
Fig.6 Safety system example 2 – STOP synchronous with emergency stop button and fault
detection through RUN output.
For safety stop, configure the wiring as shown in Fig.6 above.
Note: the above wiring is configured to prevent restart in case of a fault.
XS0 should be connected to RUN terminal and XS1 should be connected to SE, because polarity of XS0 is
positive, XS1 is negative.
The parameter No.190 (RUN terminal function selection) must be set to ‘81’. This setting makes the RUN
output to turn off in case of failure.
After the power-up, to reset the safety stop mode, press the START switch, and also press the STF switch,
then start the motor rotation.
In the above Fig.6, wired example 2, in the event of reset of ‘safe-condition’ the motor rotation will not
occur until STF is pressed.
(for normal ‘non-safety’ STF/STOP function, please refer to your drive’s User Manual)
CAUTION
To prevent restart in case of recovering from input power loss of drive, 3-wired connection for STF/STOP
control is recommended.
In case of 2-wire connection and using latching type switch to short between STF and SD/PC for starting,
ensure the compliance with safety requirement for the restarting when the drive recover from input power
loss.