DRV-28 inverter
s Installation guide
-29-
S1
S2
COM
PW
+
24V
COM
+
24V
Internal power
(
NPN mode
)
S1
S2
COM
PW
+
24V
COM
+
24V
External power
(
NPN mode
)
+
24V
Fig 4.17 NPN mode
If input signal comes from PNP transistor, set the U-type short-contact tag based on the power used
according to the figure below.
S1
S2
COM
PW
+
24V
COM
+
24V
External power
(
PNP mode
)
S1
S2
COM
PW
+
24V
COM
+
24V
Internal power
(
PNP mode
)
Fig 4.18 PNP mode
4.5 Wiring protection
4.5.1 Protect the inverter and input power cable in short-circuit
Protect the inverter and input power cable during short-circuit to avoid thermal overload.
Carry out protective measures according to the following requirements.
Input cable
Inverter
M3 ~
Fuse
Fig 4.19 Fuse configuration
Note:
Select the fuse according to operation manual. During short-circuit, the fuse will protect input
power cables to avoid damage to the inverter; when internal short-circuit occurred to the inverter, it