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3.4.4
Relay output specifications
→ For more details, refer to the FX
Series User's Manual -
3UC
Hardware Edition.
Item
Output specification (Relay)
FX
3UC
-16MR/D(S)-T
8 points
Number of output points
FX
-16EYR-T(-DS) 16 points
2NC
Output connecting type
Terminal block
30 V DC or less or 240 V AC or less
(250 V AC or less when the unit
External power supply
does not comply with CE, UL or
cUL standards)
When using one COM
terminal, make sure that the
total load current of 4 or 8
resistance load points is 4 A
or less.
2 A
Resistance load
When connecting two
/point
COM terminals outside
Max.
the PLC, make sure that the
load
total load current of 8
resistance load points is 8 A
or less.
80 VA
→ For the product life of relay
Inductive load
contacts, refer to the
FX
Series User's Manual
3UC
- Hardware Edition.
Min. load
5 V DC, 2 mA (reference value)
Open circuit leakage
-
current
OFF→ON
Approx. 10 ms
Response
time
ON→OFF
Approx. 10 ms
Output circuit insulation
Mechanical insulation
LED on panel lights when power is
Output operation display
applied to relay coil.
3.4.5
Handling of relay output circuit
Output terminal:
Main units, FX
input/output extension blocks have 4 or 8 relay
2NC
output points per common.
Two COM terminals connected to each other inside the FX
16EYR-T(-DS) are provided for outputs.
Connect two COM terminals outside the PLC so that the load
applied to each COM terminal is smaller.
Where indicates:1 or 2
3.4.6
Example of relay output wiring
FX
-16MR/
3UC
D(S)-T
FX
-16EYR-T
2NC
(-DS)
*
*
(
1)
(
1)
COM1 COM1
Y000
Y001
Y002
Emergency
Load
Load
Load
stop
100 V
AC
Fuse
*
(
1) As for the number of COM1 terminals, FX
-16MR/D(S)-T is
3UC
one.
3.5
Cautions in input and output wiring
Notes
• The derating curve below shows the simultaneous ON ratio of
available PLC inputs or outputs with respect to the ambient
temperature. Use the PLC within the simultaneous input or
output ON ratio range shown in the figure.
Derating curve
When extension units/
simultaneous ON ratio
blocks are connected
Supply voltage: 24 V DC
80 %
When only the main unit
65 %
is used (without
60 %
extension units/blocks)
applicable
20 %
40 °C
45 °C
55 °C Ambient temperature
3.5.1
Instructions for input devices
The input current of this PLC is 5 to 7 mA/24 V DC. Use input
devices applicable to this minute current. If switches for larger
current are being used, contact failure may occur.
→ For more details, refer to FX
3UC
1) In the case of input devices with built-in series diodes:
The voltage drop of the series diode should be approx. 4 V or
less. When lead switches with a series LED are used, up to two
switches can be connected in series. Also make sure that the
input current is over the input-sensing level while the switches are
ON.
(ex.) Lead switches with a series LED
2) In the case of input device with built-in parallel resistance:
Use a device with a parallel resistance of 15 kΩ or more. When
the resistance is less than 15 kΩ, connect a bleeder resistor.
3) In the case of 2-wire proximity switch:
Use a two-wire proximity switch whose leakage current is 1.5 mA
or less when the switch is off. When the current is larger than 1.5
mA, connect a bleeder resistor.
3.5.2
Cautions on transistor output wiring
→ For more details, refer to FX
3UC
-
2NC
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 PC board. To prevent
this, a protection fuse should be included at the output.
Use a load power supply capacity that is two times or more the
total rated capacity of the fuses connected to the load circuit.
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 (for commutation) must comply with the following
specifications.
Reverse voltage
5 to 10 times of the load voltage
Forward current
Load current or more
3) 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.
3.5.3
Cautions on relay output wiring
→ For more details, refer to FX
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 PC board. To prevent
this, a protection fuse should be included at the output.
2) Protection circuit of contact when inductive load is used
An internal protection circuit for the relays is not provided for the
relay output circuit. It is recommended to use inductive loads with
built-in protection circuits. When using loads without built-in
protection circuits, insert an external contact protection circuit,
etc. to reduce noise and extend the product life.
a) DC circuit
Connect a diode in parallel with the load.
Use a di od e ( fo r c o mm ut a t io n) h a v in g t h e f ol lo win g
specifications.
Reverse voltage
Forward current
b) AC circuit
Connect the surge absorber (combined CR components such
as a surge killer and spark killer, etc.) parallel to the load.
Select the rated voltage of the surge absorber suitable to the
Series User's Manual
output used. Refer to the table below for other specification
- Hardware Edition.
Electrostatic capacity
Resistance value
3) 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) Common mode
Use output contacts of the PLC in the common mode.
Series User's Manual
- Hardware Edition.
4.
Terminal Layout
3UC
Series User's Manual
- Hardware Edition.
4.1
Main units
4.1.1
The I/O wiring is different in the FX
Sections 3.3 and 3.4 for the details.
FX
-16MT/D
3UC
IN
X0
X1
X2
X3
X4
X5
X6
5 to 10 times of the load voltage
X7
COM COM
Load current or more
FX
-64MT/D
3UC
IN
X0 X10
X1 X11
X2 X12
X3 X13
Approx. 0.1 μF
X4 X14
Approx. 100 to 200 Ω
X5 X15
X6 X16
X7 X17
COM
COM
FX
-96MT/D
3UC
IN
X0
X1
X2
X3
X4
X5
X6
X7
COM
COM
FX
-MT/D
3UC
-MT/DSS. Refer to
3UC
FX
-32MT/D
3UC
OUT
IN
OUT
–
Y0
–
X0 X10
Y0 Y10
–
Y1
–
X1 X11
Y1 Y11
–
Y2
–
X2 X12
Y2 Y12
Notch
Notch
–
Y3
–
X3 X13
Y3 Y13
X4 X14
Y4 Y14
–
Y4
–
–
Y5
–
X5 X15
Y5 Y15
–
Y6
–
X6 X16
Y6 Y16
–
Y7
–
X7 X17
Y7 Y17
COM1 COM1
COM COM
COM1 COM1
OUT
IN
OUT
Y0 Y10
X20 X30
Y20 Y30
Y1 Y11
X21 X31
Y21 Y31
Y2 Y12
X22 X32
Y22 Y32
Notch
Y3 Y13
X23 X33
Y23 Y33
Y4 Y14
X24 X34
Y24 Y34
Y5 Y15
X25 X35
Y25 Y35
Y6 Y16
X26 X36
Y26 Y36
Y7 Y17
X27 X37
Y27 Y37
COM1 COM1
COM COM
COM2 COM2
OUT
IN
OUT
X10
Y0
Y10
X20 X30
Y20 Y30
X11
Y1
Y11
X21 X31
Y21 Y31
X12
Y2
Y12
X22 X32
Y22 Y32
Notch
X13
Y3
Y13
X23 X33
Y23 Y33
X14
Y4
Y14
X24 X34
Y24 Y34
X15
Y5
Y15
X25 X35
Y25 Y35
X16
Y6
Y16
X26 X36
Y26 Y36
X17
Y7
Y17
X27 X37
Y27 Y37
COM1 COM1
COM COM
COM2 COM2
IN
OUT
X40 X50
Y40 Y50
X41 X51
Y41 Y51
X42 X52
Y42 Y52
Notch
X43 X53
Y43 Y53
X44 X54
Y44 Y54
X45 X55
Y45 Y55
X46 X56
Y46 Y56
X47 X57
Y47 Y57
COM COM
COM3 COM3
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