Mitsubishi Electric 700 Series Instruction Manual page 9

• Example when using multiple FR-D700 inverters
START
Emergency
stop button
+24V X0 COM0 X1
Internal
DC24V
Safety
Circuit
24G
MITSUBISHI ELECTRIC
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
NOTE
•
The number of inverters connected to a safety relay unit should be decided under considerations of
output terminal rating of a safety relay unit.
•
Do not connect the FR-E700-SC/NF/NC (source logic) or the FR-D700-SC (source logic) together with
the FR-D700 (sink logic). If connected together, the safety stop function does not work properly.
(Refer to page 8.)
COM1 XS0 XS1 Z00 Z10 Z20
K1
K2
Z01 Z11 Z21
Effective forward current (If) : 100mA or more
+24V
A(SAFE2)
B
RY
C
CPU
+24V
*
S1
+24V
*
S2
SC
+24V
A
(SAFE2)
B
RY
C
+24V
*
S1
+24V
*
S2
SC
7
R/L1 S/L2 T/L3
Gate Gate
Driver Driver
G G
FR-D700
R/L1 S/L2 T/L3
CPU
Gate Gate
Driver Driver
G G
FR-D700
IGBTs
U V W
M
IGBTs
U V W
M