Mitsubishi Electric FR-D700 Instruction Manual page 9

• Example when using multiple FR-D700 inverters manufactured in July 2010 or before
START
Emergency stop button
+24V X0 COM0 X1
Internal
DC24V
Safety
Circuit
24G
MITSUBISHI MELSEC Safety relay module
QS90SR2SN-Q
* When connecting multiple inverters, use a diode on each safety input terminal to prevent a malfunction due to
undesirable current. Refer to the following for the specification of the diode.
Diode type : P-N junction type (Do not use a Schottky barrier diode.)
Electronic specification - Peak reverse voltage (Vrrm) : 50V or more, Peak forward voltage (Vf) : 1V or less (at 5mA),
Fig.5 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
COM1 XS0 XS1 Z00 Z10 Z20
K1
K2
Z01 Z11 Z21
STF
STOP
Effective forward current (If) : 100mA or more
A(SAFE2)
B
RY
C
STF
STOP
PC
SOURCE
CPU
+24V
*
S1
+24V
*
S2
SC
A
(SAFE2)
B
RY
C
STF
STOP
PC
SOURCE
CPU
+24V
*
S1
+24V
*
S2
SC
7
R S T
IGBTs
Gate Gate
Driver Driver
G G
FR-D700
U V
IM
R S T
IGBTs
Gate Gate
Driver Driver
G G
FR-D700
U V
IM
W
W