Mitsubishi Electronics FX3G-EEPROM-32L Benutzerhandbuch
12 Output Wiring Procedures
115
FX
3S
Series Programmable Controllers
User's Manual - Hardware Edition
11
Bui
lt-
lt-
in Anal
og
12
O
utpu
t Wi
ring
t Wi
ring
13
Wiri
ng for
ng for
Va
rious U
ses
14
Te
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M
ain
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Troub
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shooting
15
Oth
er Ex
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on
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nit
s and
Opti
ons
ons
16
Displ
ay
Modul
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(FX
3S
-5
D
M
)
17
Me
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m
ory
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A
Spec
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ial D
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(M
8000-,
D8000-)
B
Instruc
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model
s
12.2 External Wiring of Transistor Output (Sink/Source) Type
12.2.3 External wiring precautions
1. Protection circuit for load short-circuits
A short-circuit at a load connected to an output terminal could cause
burnout at the output element or the PCB. To prevent this, a protection
fuse should be inserted at the output.
Use a load power supply capacity that is at least 2 times larger than the
total rated fuse capacity.
burnout at the output element or the PCB. To prevent this, a protection
fuse should be inserted at the output.
Use a load power supply capacity that is at least 2 times larger than the
total rated fuse capacity.
2. Contact protection circuit for inductive loads
When an inductive load is connected, connect a diode
(for commutation) in parallel with the load as necessary.
The diode must comply with the following specifications.
(for commutation) in parallel with the load as necessary.
The diode must comply with the following specifications.
3. Interlock
For loads such as forward/reverse contactors, etc., where
a hazardous condition could result if switched ON
simultaneously, an external interlock should be provided
for interlocking the PLC's internal programs, as shown to
the right.
a hazardous condition could result if switched ON
simultaneously, an external interlock should be provided
for interlocking the PLC's internal programs, as shown to
the right.
Item
Guide
Reverse voltage
5 to 10 times of the load voltage
Forward current
Load current or more
Main unit
Y000
COM0
Load
Fuse
Sink output type
Main unit
Y000
+V0
Load
Fuse
Source output type
Main unit
Y000
COM0
Inductive
load
Fuse
Sink output type
Main unit
Y000
+V0
Inductive
load
Fuse
Source output type
Interlock
PLC output
element
Normal
rotation
Reverse
rotation
Limit of
normal rotation
Limit of
reverse rotation
Sink output type
+
–
Interlock
PLC output
element
Normal
rotation
Reverse
rotation
Limit of
normal rotation
Limit of
reverse rotation
Source output type
–
+