3.6.2 External wiring of transistor output
1. External wiring of sink output type
2. External wiring of source output type
3.6.3 Cautions in external wiring
For cautions in external wiring, refer to the following manual.
Refer to FX3U 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 FX3U 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.
- 4 output points/common terminal: 0.8 A or less
- 8 output points/common terminal: 0.8 A or less
As for the number of outputs per common terminal, refer to
“Chapter 4 interpretation of partition” and the following manual.
Refer to FX3U 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
Load
24 V DC
Fuse
Y000
Y001
COM1
Load
24 V DC
Fuse
Y004
Y005
COM2
PLC
Load
24 V DC
Fuse
Y000
Y001
+V0
Load
24 V DC
Fuse
Y004
Y005
+V1
Item Specification
Number
of output
points
FX3U-32MS/ES
,
FX2N-16EYS
,
FX2N-32ES
16 points
FX3U-64MS/ES 32 points
Output connecting type
Refer to FX3U Series
User's Manual - Hardware
Edition
Output form Triac (SSR)
External power supply 85 to 242 V AC
Max. load
Resistance load
0.3 A/point (
*
1)
Inductive load
15 VA/100 V AC,
30 VA/200 V AC
Min. load
0.4 VA/100 V AC,
1.6 VA/200 V AC
Open circuit leakage current
1 mA/100 V AC,
2 mA/200 V AC
Response
time
OFFON 1 ms or less
ONOFF 10 ms or less
Output circuit insulation Photo-thyristor insulation
Output operation display
LED on panel lights when
photo-thyristor is driven.
PLC
U
U
Load
Fuse
AC power
supply
Fuse
Load
AC power
supply
Y000
Y001
COM1
Y005
Y004
COM2
3.7.3 Cautions in external wiring
For cautions in external wiring, refer to the following manual.
Refer to FX3U 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 "0.4 VA/100 V
AC or less, or 1.6 VA/200 V 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 FX3U 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. 0.1 F
Resistance value Approx. 100 to 200
Y0
Partition
Output terminal
Example: FX
3U
-48MT/ES
Y2
COM1 Y1 COM2Y3
Y4
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.
For safe use
This product has been manufactured as a general-purpose part for
general industries, and has not been designed or manufactured to
be incorporated in a device or system used in purposes related to
human life.
Before using the product for special purposes such as nuclear
power, electric power, aerospace, medicine or passenger
movement vehicles, consult with Mitsubishi Electric.
This product has been manufactured under strict quality control.
However when installing the product where major accidents or
losses could occur if the product fails, install appropriate backup or
failsafe functions in the system.
HEAD OFFICE : TOKYO BUILDING, 2-7-3 MARUNOUCHI,
CHIYODA-KU, TOKYO 100-8310, JAPAN
Warranty
Exclusion of loss in opportunity and secondary loss from warranty liability
Regardless of the gratis warranty term, Mitsubishi shall not be liable for
compensation to:
(1)
Damages caused by any cause found not to be the responsibility
of Mitsubishi.
(2) Loss in opportunity, lost profits incurred to the user by Failures of
Mitsubishi products.
(3) Special damages and secondary damages whether foreseeable
or not, compensation for accidents, and compensation for damages
to products other than Mitsubishi products.
(4) Replacement by the user, maintenance of on-site equipment, start-up
test run and other tasks.
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