Mitsubishi Electric MELSEC FX3U-485ADP-MB Hardware Manual page 7

3.4.4 Relay output specifications
→For more details, refer to the FX
Series User's Manual -
3UC
Hardware Edition
Item Output specification (Relay)
Number of output points FX -16EYR-T(-DS) 16 points
2NC
Output connecting type Terminal block
30V DC or less or 240V AC or less
(250V AC or less when the unit
External power supply
does not comply with CE, UL or
cUL standards)
Make sure that the total
load current of 8
Resistance load 2A/point
resistance load points is
0.8A or less.
Max. load
80VA
→For the product life of relay
Inductive load
contacts, refer to the
FX Series User's Manual
3UC
- Hardware Edition.
Minimum load 5V DC, 2 mA (reference value)
Open circuit leakage current -
OFF→ON Approx. 10 ms
Response
time
ON→OFF Approx. 10 ms
Circuit insulation Mechanical insulation
LED on panel lights when power is
Display of output operation
applied to relay coil.
3.4.5 Handling of relay output circuit
Output terminal:
The FX -16EYR-T(-DS) has 8 relay output points per common.
2NC
Two COM terminals connected to each other inside the PLC 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 -16EYR-T
2NC
(-DS)
COM1 COM1 Y000 Y001 Y002
Load Load Load
Emergency
stop
100V
AC
Fuse
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 blocks/
simultaneous ON ratio
units are connected
Supply voltage:24V DC
80%
When only the main unit
65%
is used (without
60%
extension blocks/units)
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 7mA/24V 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
Series User's Manual
3UC
- Hardware Edition
1) In the case of input devices with built-in series diodes:
The voltage drop of the series diode should be approx. 4V 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 1.5mA
or less when the switch is off. When the current is 1.5mA or more,
connect a bleeder resistor.
3.5.2 Cautions on transistor output wiring
→ For more details, refer to FX Series User's Manual
3UC
- Hardware Edition
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
Series User's Manual
3UC
- Hardware Edition
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 in the extension block. 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.
Us e a diod e (f or c om mut at ion) having th e fo llo win g
specifications.
Reverse voltage 5 to 10 times of the load voltage
Forward current Load current or more
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
output used. Refer to the table below for other specifications.
Electrostatic capacity Approx. 0.1µF
Resistance value Approx. 100 to 200Ω
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.
4. Terminal Layout (Input/output connector)
4.1 Main units
4.1.1 FX - MT/D
3UC
The I/O wiring is different in the FX - MT/DSS. Refer to
3UC
Sections 3.3 and 3.4 for the details.
FX -16MT/D FX -32MT/D
3UC 3UC
IN OUT IN OUT
X0 X10 Y0 Y10
X0 Y0
X1 Y1 X1 X11 Y1 Y11
X2 Y2 X2 X12 Y2 Y12
Notch
X3 Y3 X3 X13 Y3 Y13
X4 Y4 X4 X14 Y4 Y14
X5 Y5 X5 X15 Y5 Y15
X6 Y6 X6 X16 Y6 Y16
X7 Y7 X7 X17 Y7 Y17
COM COM COM1 COM1 COM COM COM1 COM1
FX -64MT/D
3UC
IN OUT IN
X0 X10 Y0 Y10 X20 X30
X1 X11 Y1 Y11 X21 X31
X2 X12 Y2 Y12 X22 X32
X3 X13 Y3 Y13 X23 X33
X4 X14 Y4 Y14 X24 X34
X5 X15 Y5 Y15 X25 X35
X6 X16 Y6 Y16 X26 X36
X7 X17 Y7 Y17 X27 X37
COM COM COM1 COM1 COM COM
FX -96MT/D
3UC
IN OUT IN OUT
X0 X10 Y0 Y10 X20 X30 Y20 Y30
X1 X11 Y1 Y11 X21 X31 Y21 Y31
X2 X12 Y2 Y12 X22 X32 Y22 Y32
X3 X13 Y3 Y13 X23 X33 Y23 Y33
X4 X14 Y4 Y14 X24 X34 Y24 Y34
X5 X15 Y5 Y15 X25 X35 Y25 Y35
X6 X16 Y6 Y16 X26 X36 Y26 Y36
X7 X17 Y7 Y17 X27 X37 Y27 Y37
COM COM COM1 COM1 COM COM COM2 COM2
IN
X40 X50
X41 X51
X42 X52
X43 X53
X44 X54
X45 X55
X46 X56
X47 X57
COM COM
4.1.2 FX - MT/DSS
3UC
The I/O wiring is different in the FX
3UC
3.3 and 3.4 for the details.
FX -16MT/DSS FX
3UC 3UC
IN OUT
X0
X0 Y0
X1
X1 Y1
X2 Y2 X2
Notch
X3
X3 Y3
X4
X4 Y4
X5
X5 Y5
X6 Y6 X6
X7
X7 Y7
COM0 COM0
COM0 COM0 +V0 +V0
FX -64MT/DSS
3UC
Notch
IN OUT IN
X0 X10 Y0 Y10 X20 X30
X1 X11 Y1 Y11 X21 X31
X2 X12 Y2 Y12 X22 X32
X3 X13 Y3 Y13 X23 X33
X4 X14 Y4 Y14 X24 X34
X5 X15 Y5 Y15 X25 X35
X6 X16 Y6 Y16 X26 X36
X7 X17 Y7 Y17 X27 X37
COM0 COM0 +V0 +V0 COM1 COM1
OUT
Y20 Y30
Y21 Y31
Y22 Y32
Notch
Y23 Y33
Y24 Y34
Y25 Y35
Y26 Y36
Y27 Y37
COM2 COM2
Notch
OUT
Y40 Y50
Y41 Y51
Y42 Y52
Notch
Y43 Y53
Y44 Y54
Y45 Y55
Y46 Y56
Y47 Y57
COM3 COM3
- MT/D. Refer to Sections
-32MT/DSS
IN OUT
X10 Y0 Y10
X11 Y1 Y11
X12 Y2 Y12
Notch
X13 Y3 Y13
X14 Y4 Y14
X15 Y5 Y15
X16 Y6 Y16
X17 Y7 Y17
+V0 +V0
OUT
Y20 Y30
Y21 Y31
Y22 Y32
Notch
Y23 Y33
Y24 Y34
Y25 Y35
Y26 Y36
Y27 Y37
+V1 +V1