Mitsubishi FX2-16E series, Руководство пользователя

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FX
3U
Series Programmable Controllers
User’s Manual - Hardware Edition
241
12 Output Wiring Procedures
12.3 External Wiring of Transistor Output (Sink/Source) Type
11
Hi
gh
-Speed
Counters
12
O
utput W
iri
ng
13
W
iri
ng for
V
ari
ous
Us
es
14
Te
st R
un,
Mai
nten
ance, T
roubl
es
hooti
ng
15
IInput/Output Pow
ered
Exte
nsi
on U
nit
s
16
Input/O
utput
Extens
ion
Bl
ock
s
17
Extension Power Suppl
y
Un
it
18
Other Extens
ion
Uni
ts an
d
Opti
ons
19
D
isplay M
od
ule
20
Te
rminal
Bl
oc
k
12.3.4 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.
• External Wiring of Sink Output Type
• External Wiring of Source Output Type
2. 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 below.
• External Wiring of Sink Output Type
• External Wiring of Source Output Type
PLC
Y
COM1
Load
Fuse
PLC
Y
+V0
Load
Fuse
Limit of normal
rotation
Interlock
Limit of reverse
rotation PLC output
element
Limit of normal
rotation
Interlock
Limit of reverse
rotation
PLC output
element