2. External Wiring of Source Output Type
3.6.3 Cautions in external wiring
As for the details of Instructions for connecting input devices, refer to
the following manual.
→ Refer to FX3G Series User's Manual - Hardware Edition.
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.
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 (for commutation) must comply with the following
specifications.
Interlock
Loads, such as contactors for normal and reverse rotations, that
must not be turned on simultaneously should have an interlock in the
PLC program and an external interlock.
3.7 Triac output specifications and example of
external wiring
As for the details of the triac output specifications and external
wiring, refer to the following manual.
→ Refer to FX3G Series User's Manual - Hardware Edition.
3.7.1 Triac output specifications
*1 The total load current of resistance loads per common terminal
should be the following value or less.
- 4 output points/common terminal : 0.8A
- 8 output points/common terminal : 0.8A
As for the number of outputs per common terminal, refer to
“Chapter 4 interpretation of partition” and the following
manual.
→ Refer to FX
3G Series User's Manual - Hardware Edition.
3.7.2 External Wiring of Triac Output
Item Guide
Reverse voltage 5 to 10 times of the load voltage
Forward current Load current or more
PLC
Y0
+V0
Y1
+V1
DC power
supply
DC power
supply
Fuse
Fuse
Load
Load
Item Specification
Number
of output
points
FX2N-16EYS
,
FX2N-32ES
16 points
Output connecting type
Refer to FX
3G Series
User's Manual - Hardware
Edition
Output form Triac (SSR)
External power supply 85 to 242V AC
Max. load
Resistance load
0.3A/point
*1
Inductive load
15VA/100V AC,
30VA/200V AC
Min. load
0.4VA/100V AC,
1.6VA/200V AC
Open circuit leakage current
1mA/100V AC,
2mA/200V AC
Response
time
OFF→ON 1ms or less
ON→OFF 10ms or less
Circuit insulation Photo-thyristor insulation
Display of output operation
LED on panel lights when
photo-thyristor is driven.
PLC
Y4
COM2
U
Y0
COM1
U
Load
Fuse
AC power
supply
Fuse
Load
AC power
supply
3.7.3 Cautions in external wiring
As for the details of Instructions for connecting input devices, refer to
the following manual.
→ Refer to FX3G Series User's Manual - Hardware Edition.
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.
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.
Interlock
Loads, such as contactors for normal and reverse rotations, that must
not be turned on simultaneously should have an interlock in the PLC
program and an external interlock.
4. Terminal block layouts
For details on the terminal block layout, refer to the following manual.
→ Refer to FX
3G Series User's Manual - Hardware Edition.
Interpretation of partition
The partition of the output terminals (see following figure) indicates
the range of the output connected to the same common.
Item Guide
Static electricity capacity Approx. 0.1μF
Resistance value Approx. 100 to 200Ω
Y1
Partition
Output terminal
Example: FX
3G-40MT/ES
COM0 COM1
Y00V
24V
This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Warranty
Mitsubishi will not be held liable for damage caused by factors found not to be
the cause of Mitsubishi; opportunity loss or lost profits caused by faults in the
Mitsubishi products; damage, secondary damage, accident compensation
caused by special factors unpredictable by Mitsubishi; damages to products
other than Mitsubishi products; and to other duties.
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