Mitsubishi Electric FR-D700 Instruction Manual page 8

START
EM
+24V X0 COM0 X1 COM1
Safety
DC24V
Logic
Circuit
24G
MITSUBISHI MELSEC Safety relay unit
QS90SR2SN-Q
* When connecting multiple inverters, use a diode on the each safety input terminal to prevent a malfunction due to
undesirable current.
Fig.4 Example of multiple inverters connected to a safety relay unit
The number of inverters connected to a safety relay unit should be decided under considerations of output
terminal rating of a safety relay unit.
STF
STOP
XS0 XS1 Z00 Z10 Z20
K1
K2
Z01 Z11 Z21
STF
STOP
A
B
RY
C
STF
STOP
PC
SOURCE
CPU
*
S1
*
S2
SC
A
B
RY
C
STF
STOP
PC
SOURCE
CPU
*
S1
*
S2
SC
6
R S T
IGBTs
Gate Gate
Driver Driver
U V
FR-D700
IM
R S T
IGBTs
Gate Gate
Driver Driver
U V
FR-D700
IM
W
W