12 Output Wiring Procedures
12.3 External Wiring for Triac (SSR) Output Type
185
FX
3G
Series Programmable Controllers
User's Manual - Hardware Edition
11
H
igh-Speed
C
ounters
12
O
utpu
t Wi
ring
13
Wi
ring for
Va
rious U
ses
14
Te
st R
un,
M
ain
tenanc
e,
Troub
le
shooting
15
Input/O
utput
Pow
ere
d
Extens
ion U
nit
s
16
Input/Output
Ex
tension
Blocks
17
Extensi
on
Pow
er Suppl
y
Un
it
18
O
ther Ex
tensi
on
Un
its
an
d
O
pti
ons
19
Displ
ay
Modul
e
20
Te
rmi
nal Block
12.3.2 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.
2. Micro current load
The PLC's internal Triac output circuit is equipped with a turn-off
C-R absorber. When connecting a very low current load of
"0.4VA/100V AC or less, or 1.6VA/200V AC or less", please
connect a surge absorber parallel to the load.
Select the rated voltage of a surge absorber that is suitable for the
load being used. Refer to the table below for other specifications.
Reference
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.
4. In-phase
PLC output contacts (*) should be used in an "in-phase"
manner.
Item
Guide
Static electricity capacity
Approx. 0.1 F
Resistance value
Approx. 100 to 200
Manufacturer
Model name
Manufacturer
Model name
Okaya Electric Industries Co., Ltd. CR-10201
Rubycon Corporation
250MCRA104100M B0325
PLC
COM1
Load
Fuse
Y
Micro current load
Surge
absorber
Inter-
lock
Normal
rotation
Reverse
rotation
Limit of normal
rotation
PLC output
element
Limit of reverse
rotation
Bad
*
*
*
*
Good
