Mitsubishi FX 2N-20PSU DC User manual

FX2N-20PSU DC POWER SUPPLY UNIT
USER’S MANUAL
JY992D85101B
This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX2N-20PSU DC power supply unit. It should be read and understood before
attempting to install or use the unit. Further information can be found in the FX series PLC hardware man-
uals.
If in doubt at any stage during the installation of the FX2N-20PSU DC power supply unit always consult a
professional electrical engineer who is qualified and trained to the local and national standards.
Note’s on the symbology used in this manual
At various times through out this manual certain symbols will be used to highlight points of infor-
mation which are intended to ensure the users personal safety and protect the integrity of the
equipment. Whenever any of the following symbols are encountered, its associated note must be
read and understood. Each of the symbols used will now be listed with a brief description of its
meaning.
Hardware warnings
1) Indicates that the identified danger WILL cause physical and property damage.
2) Indicates that the identified danger could POSSIBLY cause physical and property damage.
1. INTRODUCTION
The DC power supply unit FX2N-20PSU is available as the following applications.
• Power supply of 24V DC power type PLC
• Power supply of special extension block of PLC
• Power supply of sensor connected to input of PLC
• Power supply of DC load connected to output of PLC
• Power supply of display unit such as graphic operation terminal (GOT)
2. EXTERNAL DIMENSION
POWER
AC85 to 264V
L N
24V+ 24V-
24V-
24V+
24V+
24V-
24V+
24V-
LN
75(2.95)
90(3.5)
60(2.36)
7.5(0.3)
4(0.16)
4(0.16)
7.5(0.3)
52(2.05)
98(3.85)
Mass Approximately 0.3 kg
Outer color Munsell 0.08GY/7.64/0.81
DIN rail 35mm(1.38)
Unit mm(inches)
2-f4.5
(0.18)
3. GENERAL SPECIFICATIONS
Item Description
Operating Tempera-
ture 0 to 55 °C (32 to 131 °F)
Storage Temperature -20 to 70 °C (-4 to 158 °F)
Operating Humidity 35 to 85% Relative Humidity, No condensation
storage Humidity 35 to 90% Relative Humidity, No condensation
Vibration Resistance
- Direct Mounting
10 - 57 Hz: 0.75 mm Half Amplitude
57 - 150 Hz: 9.8 m/s2Acceleration
Sweep Count for X, Y, Z: 10 times (80 min in each direction)
Vibration Resistance
- DIN rail Mounting
10 - 57 Hz: 0.035 mm Half Amplitude
57 - 150 Hz: 4.9 m/s2Acceleration
Sweep Count for X, Y, Z: 10 times (80 min in each direction)
Shock Resistance 147m/s2Acceleration, Action Time: 11 ms
3 times in each direction X, Y, and Z
Noise Immunity 1000Vp-p, 1microsecond, 30 - 100 Hz, tested by noise simulator
Dielectric Withstand
Volta ge 500V AC > 1 min, tested between all points, terminals and ground
Insulation Resistance 5MΩ> at 500V DC, tested between all points, terminals and ground
Ground Class 3 (100 Ωor less)
Common grounding
(good)
Common grounding
(not allowed)
Dedicated grounding
(best)
PLC/power
supply
Another
equipment
PLC/power
supply
Another
equipment
PLC/power
supply
Another
equipment
4. PERFORMANCE SPECOFOCATIONS
*1 The available output current varies depending on the ambient operating temperature. Use the FX2N-
20PSU in the available range in accordance with the output derating graph shown above.
*2 If the output current flows beyond the specified value, the overcurrent protection circuit is actuated
and the output voltage drops.
When the overcurrent status or the short-circuit status returns to acceptable levels, the output voltage
automatically recovers.
*3 If the voltage beyond the specified value is generated by an internal failure, etc., the output is shut
down so that high voltage is not output. When the voltage comes from a load circuit connected to an
output terminal or when overvoltage is input from the outside, the overvoltage protection circuit may
be actuated.
When the overvoltage protection circuit is actuated, the output is shut down and does not automati-
cally recover. Ask for inspection and repair after such an occurance.
Input
Input voltage 85 to 264V AC
Frequency 50/60Hz
Fuse rating 3.15A (built in)
Rush current 60A/200V AC maximum
Output
Output voltage 24V DC ± 10%
Output current 2A (maximum), 0.2A (minimum)
(Derating is performed if ambient temperature exceeds 40 °C.)*1
Ripple noise 500mVp-p or less
Holding time 10ms/100V AC
Protection
function
Protection against
overcurrent *2
Actuated when current becomes 110 - 160% or more, voltage drop
occurs automatic recovery
Protection against
overvoltage *3
Actuated when voltage becomes 110 - 140% or more, output shuts-
down, no automatic recovery (diode clamp)
Output indication Green LED(POWER) is lit while voltage is output.
Others Serial/parallel operation with other power supply units is not allowed.
(See Section 6.3)
0
010 20 30 40 50 55
20
40
60
80
100
Ambient temperature (°C)
Load ratio (%)
[Output derating]
Guidelines for the safety of the user and protection of the FX2N-20PSU DC
POWER SUPPLY UNIT
• This manual has been written to be used by trained and competent personnel. This is defined
by the European directives for machinery, low voltage and EMC.
• If in doubt at any stage during the installation of the FX2N-20PSU always consult a profes-
sional electrical engineer who is qualified and trained to the local and national standards. If in
doubt about the operation or use of the FX2N-20PSU please consult the nearest Mitsubishi
Electric distributor.
• Under no circumstances will Mitsubishi Electric be liable or responsible for any consequential
damage that may arise as a result of the installation or use of this equipment.
• All examples and diagrams shown in this manual are intended only as an aid to understand-
ing the text, not to guarantee operation. Mitsubishi Electric will accept no responsibility for
actual use of the product based on these illustrative examples.
• Owing to the very great variety in possible application of this equipment, you must satisfy
yourself as to its suitability for your specific application.

FX2N-20PSU DC POWER SUPPLY UNIT
USER’S MANUAL
JY992D85101B
This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX2N-20PSU DC power supply unit. It should be read and understood before
attempting to install or use the unit. Further information can be found in the FX series PLC hardware man-
uals.
If in doubt at any stage during the installation of the FX2N-20PSU DC power supply unit always consult a
professional electrical engineer who is qualified and trained to the local and national standards.
Note’s on the symbology used in this manual
At various times through out this manual certain symbols will be used to highlight points of infor-
mation which are intended to ensure the users personal safety and protect the integrity of the
equipment. Whenever any of the following symbols are encountered, its associated note must be
read and understood. Each of the symbols used will now be listed with a brief description of its
meaning.
Hardware warnings
1) Indicates that the identified danger WILL cause physical and property damage.
2) Indicates that the identified danger could POSSIBLY cause physical and property damage.
1. INTRODUCTION
The DC power supply unit FX2N-20PSU is available as the following applications.
• Power supply of 24V DC power type PLC
• Power supply of special extension block of PLC
• Power supply of sensor connected to input of PLC
• Power supply of DC load connected to output of PLC
• Power supply of display unit such as graphic operation terminal (GOT)
2. EXTERNAL DIMENSION
POWER
AC85 to 264V
L N
24V+ 24V-
24V-
24V+
24V+
24V-
24V+
24V-
LN
75(2.95)
90(3.5)
60(2.36)
7.5(0.3)
4(0.16)
4(0.16)
7.5(0.3)
52(2.05)
98(3.85)
Mass Approximately 0.3 kg
Outer color Munsell 0.08GY/7.64/0.81
DIN rail 35mm(1.38)
Unit mm(inches)
2-f4.5
(0.18)
3. GENERAL SPECIFICATIONS
Item Description
Operating Tempera-
ture 0 to 55 °C (32 to 131 °F)
Storage Temperature -20 to 70 °C (-4 to 158 °F)
Operating Humidity 35 to 85% Relative Humidity, No condensation
storage Humidity 35 to 90% Relative Humidity, No condensation
Vibration Resistance
- Direct Mounting
10 - 57 Hz: 0.75 mm Half Amplitude
57 - 150 Hz: 9.8 m/s2Acceleration
Sweep Count for X, Y, Z: 10 times (80 min in each direction)
Vibration Resistance
- DIN rail Mounting
10 - 57 Hz: 0.035 mm Half Amplitude
57 - 150 Hz: 4.9 m/s2Acceleration
Sweep Count for X, Y, Z: 10 times (80 min in each direction)
Shock Resistance 147m/s2Acceleration, Action Time: 11 ms
3 times in each direction X, Y, and Z
Noise Immunity 1000Vp-p, 1microsecond, 30 - 100 Hz, tested by noise simulator
Dielectric Withstand
Volta ge 500V AC > 1 min, tested between all points, terminals and ground
Insulation Resistance 5MΩ> at 500V DC, tested between all points, terminals and ground
Ground Class 3 (100 Ωor less)
Common grounding
(good)
Common grounding
(not allowed)
Dedicated grounding
(best)
PLC/power
supply
Another
equipment
PLC/power
supply
Another
equipment
PLC/power
supply
Another
equipment
4. PERFORMANCE SPECOFOCATIONS
*1 The available output current varies depending on the ambient operating temperature. Use the FX2N-
20PSU in the available range in accordance with the output derating graph shown above.
*2 If the output current flows beyond the specified value, the overcurrent protection circuit is actuated
and the output voltage drops.
When the overcurrent status or the short-circuit status returns to acceptable levels, the output voltage
automatically recovers.
*3 If the voltage beyond the specified value is generated by an internal failure, etc., the output is shut
down so that high voltage is not output. When the voltage comes from a load circuit connected to an
output terminal or when overvoltage is input from the outside, the overvoltage protection circuit may
be actuated.
When the overvoltage protection circuit is actuated, the output is shut down and does not automati-
cally recover. Ask for inspection and repair after such an occurance.
Input
Input voltage 85 to 264V AC
Frequency 50/60Hz
Fuse rating 3.15A (built in)
Rush current 60A/200V AC maximum
Output
Output voltage 24V DC ± 10%
Output current 2A (maximum), 0.2A (minimum)
(Derating is performed if ambient temperature exceeds 40 °C.)*1
Ripple noise 500mVp-p or less
Holding time 10ms/100V AC
Protection
function
Protection against
overcurrent *2
Actuated when current becomes 110 - 160% or more, voltage drop
occurs automatic recovery
Protection against
overvoltage *3
Actuated when voltage becomes 110 - 140% or more, output shuts-
down, no automatic recovery (diode clamp)
Output indication Green LED(POWER) is lit while voltage is output.
Others Serial/parallel operation with other power supply units is not allowed.
(See Section 6.3)
0
010 20 30 40 50 55
20
40
60
80
100
Ambient temperature (°C)
Load ratio (%)
[Output derating]
Guidelines for the safety of the user and protection of the FX2N-20PSU DC
POWER SUPPLY UNIT
• This manual has been written to be used by trained and competent personnel. This is defined
by the European directives for machinery, low voltage and EMC.
• If in doubt at any stage during the installation of the FX2N-20PSU always consult a profes-
sional electrical engineer who is qualified and trained to the local and national standards. If in
doubt about the operation or use of the FX2N-20PSU please consult the nearest Mitsubishi
Electric distributor.
• Under no circumstances will Mitsubishi Electric be liable or responsible for any consequential
damage that may arise as a result of the installation or use of this equipment.
• All examples and diagrams shown in this manual are intended only as an aid to understand-
ing the text, not to guarantee operation. Mitsubishi Electric will accept no responsibility for
actual use of the product based on these illustrative examples.
• Owing to the very great variety in possible application of this equipment, you must satisfy
yourself as to its suitability for your specific application.

FX2N-20PSU DC POWER SUPPLY UNIT
USER’S MANUAL
JY992D85101B
This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX2N-20PSU DC power supply unit. It should be read and understood before
attempting to install or use the unit. Further information can be found in the FX series PLC hardware man-
uals.
If in doubt at any stage during the installation of the FX2N-20PSU DC power supply unit always consult a
professional electrical engineer who is qualified and trained to the local and national standards.
Note’s on the symbology used in this manual
At various times through out this manual certain symbols will be used to highlight points of infor-
mation which are intended to ensure the users personal safety and protect the integrity of the
equipment. Whenever any of the following symbols are encountered, its associated note must be
read and understood. Each of the symbols used will now be listed with a brief description of its
meaning.
Hardware warnings
1) Indicates that the identified danger WILL cause physical and property damage.
2) Indicates that the identified danger could POSSIBLY cause physical and property damage.
1. INTRODUCTION
The DC power supply unit FX2N-20PSU is available as the following applications.
• Power supply of 24V DC power type PLC
• Power supply of special extension block of PLC
• Power supply of sensor connected to input of PLC
• Power supply of DC load connected to output of PLC
• Power supply of display unit such as graphic operation terminal (GOT)
2. EXTERNAL DIMENSION
POWER
AC85 to 264V
L N
24V+ 24V-
24V-
24V+
24V+
24V-
24V+
24V-
LN
75(2.95)
90(3.5)
60(2.36)
7.5(0.3)
4(0.16)
4(0.16)
7.5(0.3)
52(2.05)
98(3.85)
Mass Approximately 0.3 kg
Outer color Munsell 0.08GY/7.64/0.81
DIN rail 35mm(1.38)
Unit mm(inches)
2-f4.5
(0.18)
3. GENERAL SPECIFICATIONS
Item Description
Operating Tempera-
ture 0 to 55 °C (32 to 131 °F)
Storage Temperature -20 to 70 °C (-4 to 158 °F)
Operating Humidity 35 to 85% Relative Humidity, No condensation
storage Humidity 35 to 90% Relative Humidity, No condensation
Vibration Resistance
- Direct Mounting
10 - 57 Hz: 0.75 mm Half Amplitude
57 - 150 Hz: 9.8 m/s2Acceleration
Sweep Count for X, Y, Z: 10 times (80 min in each direction)
Vibration Resistance
- DIN rail Mounting
10 - 57 Hz: 0.035 mm Half Amplitude
57 - 150 Hz: 4.9 m/s2Acceleration
Sweep Count for X, Y, Z: 10 times (80 min in each direction)
Shock Resistance 147m/s2Acceleration, Action Time: 11 ms
3 times in each direction X, Y, and Z
Noise Immunity 1000Vp-p, 1microsecond, 30 - 100 Hz, tested by noise simulator
Dielectric Withstand
Volta ge 500V AC > 1 min, tested between all points, terminals and ground
Insulation Resistance 5MΩ> at 500V DC, tested between all points, terminals and ground
Ground Class 3 (100 Ωor less)
Common grounding
(good)
Common grounding
(not allowed)
Dedicated grounding
(best)
PLC/power
supply
Another
equipment
PLC/power
supply
Another
equipment
PLC/power
supply
Another
equipment
4. PERFORMANCE SPECOFOCATIONS
*1 The available output current varies depending on the ambient operating temperature. Use the FX2N-
20PSU in the available range in accordance with the output derating graph shown above.
*2 If the output current flows beyond the specified value, the overcurrent protection circuit is actuated
and the output voltage drops.
When the overcurrent status or the short-circuit status returns to acceptable levels, the output voltage
automatically recovers.
*3 If the voltage beyond the specified value is generated by an internal failure, etc., the output is shut
down so that high voltage is not output. When the voltage comes from a load circuit connected to an
output terminal or when overvoltage is input from the outside, the overvoltage protection circuit may
be actuated.
When the overvoltage protection circuit is actuated, the output is shut down and does not automati-
cally recover. Ask for inspection and repair after such an occurance.
Input
Input voltage 85 to 264V AC
Frequency 50/60Hz
Fuse rating 3.15A (built in)
Rush current 60A/200V AC maximum
Output
Output voltage 24V DC ± 10%
Output current 2A (maximum), 0.2A (minimum)
(Derating is performed if ambient temperature exceeds 40 °C.)*1
Ripple noise 500mVp-p or less
Holding time 10ms/100V AC
Protection
function
Protection against
overcurrent *2
Actuated when current becomes 110 - 160% or more, voltage drop
occurs automatic recovery
Protection against
overvoltage *3
Actuated when voltage becomes 110 - 140% or more, output shuts-
down, no automatic recovery (diode clamp)
Output indication Green LED(POWER) is lit while voltage is output.
Others Serial/parallel operation with other power supply units is not allowed.
(See Section 6.3)
0
010 20 30 40 50 55
20
40
60
80
100
Ambient temperature (°C)
Load ratio (%)
[Output derating]
Guidelines for the safety of the user and protection of the FX2N-20PSU DC
POWER SUPPLY UNIT
• This manual has been written to be used by trained and competent personnel. This is defined
by the European directives for machinery, low voltage and EMC.
• If in doubt at any stage during the installation of the FX2N-20PSU always consult a profes-
sional electrical engineer who is qualified and trained to the local and national standards. If in
doubt about the operation or use of the FX2N-20PSU please consult the nearest Mitsubishi
Electric distributor.
• Under no circumstances will Mitsubishi Electric be liable or responsible for any consequential
damage that may arise as a result of the installation or use of this equipment.
• All examples and diagrams shown in this manual are intended only as an aid to understand-
ing the text, not to guarantee operation. Mitsubishi Electric will accept no responsibility for
actual use of the product based on these illustrative examples.
• Owing to the very great variety in possible application of this equipment, you must satisfy
yourself as to its suitability for your specific application.

HEAD OFFICE
HIMEJI WORKS
: TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
: 840, CHIYODA CHO, HIMEJI, JAPAN
5. INSTALLATION
Cautions on installation
• Use the unit in the environment for the general specifications described in Section 3 in the
manual.
Never use the unit in a place with dust, soot, conductive dusts, corrosive gas or flammable gas,
place exposed to high temperature, dew condensation, rain and wind, or in a place exposed to
vibration or impact.
If the unit is used in such a place, electrical shock, fire, malfunction, damages in the unit or
deterioration of the unit may be caused.
• Never drop cutting chips or electric wire chips into the ventilation window while drilling screw
holes or wiring cables.
Such chips may cause fire, failure or malfunction.
• After finishing installation, remove a dust preventing sheet adhered on the ventilation window.
If the sheet remains attached, fire, failure or malfunction may be caused.
Note
✩During the installation/wiring work, place a dust preventing sheet on the ventilation window.
✩In order to prevent temperature rise, never install the unit on the floor surface, on the ceiling surface or
in the vertical direction.
Make sure to install the unit on a panel face in the horizontal direction as shown in the figure below.
✩Use crimp-style terminals of the dimensions shown in the figure below.
✩Tighten terminals at a torque of 0.5 to 0.8 Nxm. Securely tighten terminals so that malfunction does not
occur.
For M3(0.12in)
Max. 6.2mm (0.24in)
Max. 6.2mm (0.24in)
[Installation direction] [Crimp-style terminal]
6. WIRING
Cautions on wiring
• Make sure to shut down the power supplies of all phases on the outside before starting instal-
lation or wiring.
If the power supplies are not shut down, you may get electrical shock or the unit may be dam-
aged.
• Make sure to attach terminal covers offered as accessories before supplying power and start-
ing operation after the installation/wiring work.
• Correctly supply power to the PLC in accordance with "Cautions on Safety" described in the
manual of the PLC.
If power is not correctly supplied, the unit may be damaged.
• Connect the wiring of the DC power supply to dedicated terminals as described in this manual.
If the AC power supply is connected to a DC power terminal, the unit may be burnt.
• Never perform external wiring to unused terminals . Such wiring may damage the unit.
• Perform Class 3 grounding to the grounding terminal in the unit. However, never perform com-
mon grounding (See Section 3) with a strong power system.
•
6.1 When FX2N-20PSU is connected to 24V DC power type PLC
24+ 24-
L N 24V 0V X1 X2 X5
PLC
Sensor 1 Sensor 2
Class 3
grounding
85 to 264V AC
FX2N-20PSU
S/S X7
24+ 24-
L N 24V 0V X1 X2 X5
PLC
Sensor 1 Sensor 2
Class 3
grounding
85 to 264V AC
FX2N-20PSU
S/S X7
Source inputs (-ve S/S)
Sink inputs (+ve S/S)
6.2 When FX2N-20PSU is used together with 24V DC service power supply built in PLC
In the AC power type FX PLC, a 24V DC service power supply is built.
When using the FX2N-20PSU and the service power supply together, connect the "24-" terminal of the
FX2N-20PSU and the "COM" terminal on the minus side of the service power supply as shown in the fig-
ure below.
24+ 24-
L N
Class 3
grounding
85 to 264V AC
FX2N-20PSU
Connect the minus line to share it.
L N X1 X2 X5
PLC
S/S X724V 0V
24V
Service
power supply
Sensor 1 Sensor 2
24+ 24-
L N
Class 3
grounding
85 to 264V AC
FX2N-20PSU
Connect the minus line to share it.
L N X1 X2 X5
PLC
S/S X724V 0V
24V
Service
power supply
Sensor 1 Sensor 2
Source inputs (-ve S/S)
Sink inputs (+ve S/S)
6.3 Cautions
Cautions on design
• Never connect in serial nor parallel the DC output terminals of the FX2N-20PSU to another
power supply unit.
Such a connection may damage the unit.
✩Never connect the FX2N-20PSU in parallel to another power supply unit.
✩Never connect the FX2N-20PSU serially to another power supply unit.
24+ 24-
FX2N-20PSU FX2N-20PSU or
another power
supply unit
+-
24+ 24-
FX2N-20PSU FX PLC
Service power
supply
24V 0V
24+ 24-
FX2N-20PSU FX2N-20PSU or
another power
supply unit
+-
24+ 24-
FX2N-20PSU FX PLC
Service power
supply
24V 0V
7. TROUBLESHOOTING
When it is suspected that the FX2N-20PSU is not normally operating, check the following items.
• Check the POWER LED status.
[When the POWER LED is extinguished]
- Check the input voltage of the FX2N-20PSU.
If any abnormality is detected →Input the specified supply voltage.
- Disconnect the wiring from the output terminals "24+" and "24-".
If the POWER LED lights →The overcurrent protection circuit (See Section 4) is actuated.
Investigate the load connected to the output terminals.
If the POWER LED remains extinguished →The overvoltage protection circuit (See Section 4)
may be actuated. Ask for inspection and repair.
[When the POWER LED is lit]
- Check the input voltage of the FX2N-20PSU.
If any abnormality is detected →Input the specified supply voltage.
- Check the external wiring.
If any abnormality is detected →Correct the wiring (See Section 6).
• The overcurrent protection circuit and the overvoltage protection circuit are built in the FX2N-20PSU.
If such a protection circuit is actuated, the output voltage drops or is shut down. For details, refer to
Section 4.
Manual number : JY992D85101
Manual revision : B
Date : SEP. 2008
JY992D85101B
Effective SEP. 2008
Specifications are subject to
change without notice

HEAD OFFICE
HIMEJI WORKS
: TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
: 840, CHIYODA CHO, HIMEJI, JAPAN
5. INSTALLATION
Cautions on installation
• Use the unit in the environment for the general specifications described in Section 3 in the
manual.
Never use the unit in a place with dust, soot, conductive dusts, corrosive gas or flammable gas,
place exposed to high temperature, dew condensation, rain and wind, or in a place exposed to
vibration or impact.
If the unit is used in such a place, electrical shock, fire, malfunction, damages in the unit or
deterioration of the unit may be caused.
• Never drop cutting chips or electric wire chips into the ventilation window while drilling screw
holes or wiring cables.
Such chips may cause fire, failure or malfunction.
• After finishing installation, remove a dust preventing sheet adhered on the ventilation window.
If the sheet remains attached, fire, failure or malfunction may be caused.
Note
✩During the installation/wiring work, place a dust preventing sheet on the ventilation window.
✩In order to prevent temperature rise, never install the unit on the floor surface, on the ceiling surface or
in the vertical direction.
Make sure to install the unit on a panel face in the horizontal direction as shown in the figure below.
✩Use crimp-style terminals of the dimensions shown in the figure below.
✩Tighten terminals at a torque of 0.5 to 0.8 Nxm. Securely tighten terminals so that malfunction does not
occur.
For M3(0.12in)
Max. 6.2mm (0.24in)
Max. 6.2mm (0.24in)
[Installation direction] [Crimp-style terminal]
6. WIRING
Cautions on wiring
• Make sure to shut down the power supplies of all phases on the outside before starting instal-
lation or wiring.
If the power supplies are not shut down, you may get electrical shock or the unit may be dam-
aged.
• Make sure to attach terminal covers offered as accessories before supplying power and start-
ing operation after the installation/wiring work.
• Correctly supply power to the PLC in accordance with "Cautions on Safety" described in the
manual of the PLC.
If power is not correctly supplied, the unit may be damaged.
• Connect the wiring of the DC power supply to dedicated terminals as described in this manual.
If the AC power supply is connected to a DC power terminal, the unit may be burnt.
• Never perform external wiring to unused terminals . Such wiring may damage the unit.
• Perform Class 3 grounding to the grounding terminal in the unit. However, never perform com-
mon grounding (See Section 3) with a strong power system.
•
6.1 When FX2N-20PSU is connected to 24V DC power type PLC
24+ 24-
L N 24V 0V X1 X2 X5
PLC
Sensor 1 Sensor 2
Class 3
grounding
85 to 264V AC
FX2N-20PSU
S/S X7
24+ 24-
L N 24V 0V X1 X2 X5
PLC
Sensor 1 Sensor 2
Class 3
grounding
85 to 264V AC
FX2N-20PSU
S/S X7
Source inputs (-ve S/S)
Sink inputs (+ve S/S)
6.2 When FX2N-20PSU is used together with 24V DC service power supply built in PLC
In the AC power type FX PLC, a 24V DC service power supply is built.
When using the FX2N-20PSU and the service power supply together, connect the "24-" terminal of the
FX2N-20PSU and the "COM" terminal on the minus side of the service power supply as shown in the fig-
ure below.
24+ 24-
L N
Class 3
grounding
85 to 264V AC
FX2N-20PSU
Connect the minus line to share it.
L N X1 X2 X5
PLC
S/S X724V 0V
24V
Service
power supply
Sensor 1 Sensor 2
24+ 24-
L N
Class 3
grounding
85 to 264V AC
FX2N-20PSU
Connect the minus line to share it.
L N X1 X2 X5
PLC
S/S X724V 0V
24V
Service
power supply
Sensor 1 Sensor 2
Source inputs (-ve S/S)
Sink inputs (+ve S/S)
6.3 Cautions
Cautions on design
• Never connect in serial nor parallel the DC output terminals of the FX2N-20PSU to another
power supply unit.
Such a connection may damage the unit.
✩Never connect the FX2N-20PSU in parallel to another power supply unit.
✩Never connect the FX2N-20PSU serially to another power supply unit.
24+ 24-
FX2N-20PSU FX2N-20PSU or
another power
supply unit
+-
24+ 24-
FX2N-20PSU FX PLC
Service power
supply
24V 0V
24+ 24-
FX2N-20PSU FX2N-20PSU or
another power
supply unit
+-
24+ 24-
FX2N-20PSU FX PLC
Service power
supply
24V 0V
7. TROUBLESHOOTING
When it is suspected that the FX2N-20PSU is not normally operating, check the following items.
• Check the POWER LED status.
[When the POWER LED is extinguished]
- Check the input voltage of the FX2N-20PSU.
If any abnormality is detected →Input the specified supply voltage.
- Disconnect the wiring from the output terminals "24+" and "24-".
If the POWER LED lights →The overcurrent protection circuit (See Section 4) is actuated.
Investigate the load connected to the output terminals.
If the POWER LED remains extinguished →The overvoltage protection circuit (See Section 4)
may be actuated. Ask for inspection and repair.
[When the POWER LED is lit]
- Check the input voltage of the FX2N-20PSU.
If any abnormality is detected →Input the specified supply voltage.
- Check the external wiring.
If any abnormality is detected →Correct the wiring (See Section 6).
• The overcurrent protection circuit and the overvoltage protection circuit are built in the FX2N-20PSU.
If such a protection circuit is actuated, the output voltage drops or is shut down. For details, refer to
Section 4.
Manual number : JY992D85101
Manual revision : B
Date : SEP. 2008
JY992D85101B
Effective SEP. 2008
Specifications are subject to
change without notice

HEAD OFFICE
HIMEJI WORKS
: TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
: 840, CHIYODA CHO, HIMEJI, JAPAN
5. INSTALLATION
Cautions on installation
• Use the unit in the environment for the general specifications described in Section 3 in the
manual.
Never use the unit in a place with dust, soot, conductive dusts, corrosive gas or flammable gas,
place exposed to high temperature, dew condensation, rain and wind, or in a place exposed to
vibration or impact.
If the unit is used in such a place, electrical shock, fire, malfunction, damages in the unit or
deterioration of the unit may be caused.
• Never drop cutting chips or electric wire chips into the ventilation window while drilling screw
holes or wiring cables.
Such chips may cause fire, failure or malfunction.
• After finishing installation, remove a dust preventing sheet adhered on the ventilation window.
If the sheet remains attached, fire, failure or malfunction may be caused.
Note
✩During the installation/wiring work, place a dust preventing sheet on the ventilation window.
✩In order to prevent temperature rise, never install the unit on the floor surface, on the ceiling surface or
in the vertical direction.
Make sure to install the unit on a panel face in the horizontal direction as shown in the figure below.
✩Use crimp-style terminals of the dimensions shown in the figure below.
✩Tighten terminals at a torque of 0.5 to 0.8 Nxm. Securely tighten terminals so that malfunction does not
occur.
For M3(0.12in)
Max. 6.2mm (0.24in)
Max. 6.2mm (0.24in)
[Installation direction] [Crimp-style terminal]
6. WIRING
Cautions on wiring
• Make sure to shut down the power supplies of all phases on the outside before starting instal-
lation or wiring.
If the power supplies are not shut down, you may get electrical shock or the unit may be dam-
aged.
• Make sure to attach terminal covers offered as accessories before supplying power and start-
ing operation after the installation/wiring work.
• Correctly supply power to the PLC in accordance with "Cautions on Safety" described in the
manual of the PLC.
If power is not correctly supplied, the unit may be damaged.
• Connect the wiring of the DC power supply to dedicated terminals as described in this manual.
If the AC power supply is connected to a DC power terminal, the unit may be burnt.
• Never perform external wiring to unused terminals . Such wiring may damage the unit.
• Perform Class 3 grounding to the grounding terminal in the unit. However, never perform com-
mon grounding (See Section 3) with a strong power system.
•
6.1 When FX2N-20PSU is connected to 24V DC power type PLC
24+ 24-
L N 24V 0V X1 X2 X5
PLC
Sensor 1 Sensor 2
Class 3
grounding
85 to 264V AC
FX2N-20PSU
S/S X7
24+ 24-
L N 24V 0V X1 X2 X5
PLC
Sensor 1 Sensor 2
Class 3
grounding
85 to 264V AC
FX2N-20PSU
S/S X7
Source inputs (-ve S/S)
Sink inputs (+ve S/S)
6.2 When FX2N-20PSU is used together with 24V DC service power supply built in PLC
In the AC power type FX PLC, a 24V DC service power supply is built.
When using the FX2N-20PSU and the service power supply together, connect the "24-" terminal of the
FX2N-20PSU and the "COM" terminal on the minus side of the service power supply as shown in the fig-
ure below.
24+ 24-
L N
Class 3
grounding
85 to 264V AC
FX2N-20PSU
Connect the minus line to share it.
L N X1 X2 X5
PLC
S/S X724V 0V
24V
Service
power supply
Sensor 1 Sensor 2
24+ 24-
L N
Class 3
grounding
85 to 264V AC
FX2N-20PSU
Connect the minus line to share it.
L N X1 X2 X5
PLC
S/S X724V 0V
24V
Service
power supply
Sensor 1 Sensor 2
Source inputs (-ve S/S)
Sink inputs (+ve S/S)
6.3 Cautions
Cautions on design
• Never connect in serial nor parallel the DC output terminals of the FX2N-20PSU to another
power supply unit.
Such a connection may damage the unit.
✩Never connect the FX2N-20PSU in parallel to another power supply unit.
✩Never connect the FX2N-20PSU serially to another power supply unit.
24+ 24-
FX2N-20PSU FX2N-20PSU or
another power
supply unit
+-
24+ 24-
FX2N-20PSU FX PLC
Service power
supply
24V 0V
24+ 24-
FX2N-20PSU FX2N-20PSU or
another power
supply unit
+-
24+ 24-
FX2N-20PSU FX PLC
Service power
supply
24V 0V
7. TROUBLESHOOTING
When it is suspected that the FX2N-20PSU is not normally operating, check the following items.
• Check the POWER LED status.
[When the POWER LED is extinguished]
- Check the input voltage of the FX2N-20PSU.
If any abnormality is detected →Input the specified supply voltage.
- Disconnect the wiring from the output terminals "24+" and "24-".
If the POWER LED lights →The overcurrent protection circuit (See Section 4) is actuated.
Investigate the load connected to the output terminals.
If the POWER LED remains extinguished →The overvoltage protection circuit (See Section 4)
may be actuated. Ask for inspection and repair.
[When the POWER LED is lit]
- Check the input voltage of the FX2N-20PSU.
If any abnormality is detected →Input the specified supply voltage.
- Check the external wiring.
If any abnormality is detected →Correct the wiring (See Section 6).
• The overcurrent protection circuit and the overvoltage protection circuit are built in the FX2N-20PSU.
If such a protection circuit is actuated, the output voltage drops or is shut down. For details, refer to
Section 4.
Manual number : JY992D85101
Manual revision : B
Date : SEP. 2008
JY992D85101B
Effective SEP. 2008
Specifications are subject to
change without notice

FX2N-20PSU DC POWER SUPPLY UNIT
USER’S MANUAL
JY992D85101B
This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX2N-20PSU DC power supply unit. It should be read and understood before
attempting to install or use the unit. Further information can be found in the FX series PLC hardware man-
uals.
If in doubt at any stage during the installation of the FX2N-20PSU DC power supply unit always consult a
professional electrical engineer who is qualified and trained to the local and national standards.
Note’s on the symbology used in this manual
At various times through out this manual certain symbols will be used to highlight points of infor-
mation which are intended to ensure the users personal safety and protect the integrity of the
equipment. Whenever any of the following symbols are encountered, its associated note must be
read and understood. Each of the symbols used will now be listed with a brief description of its
meaning.
Hardware warnings
1) Indicates that the identified danger WILL cause physical and property damage.
2) Indicates that the identified danger could POSSIBLY cause physical and property damage.
1. INTRODUCTION
The DC power supply unit FX2N-20PSU is available as the following applications.
• Power supply of 24V DC power type PLC
• Power supply of special extension block of PLC
• Power supply of sensor connected to input of PLC
• Power supply of DC load connected to output of PLC
• Power supply of display unit such as graphic operation terminal (GOT)
2. EXTERNAL DIMENSION
POWER
AC85 to 264V
L N
24V+ 24V-
24V-
24V+
24V+
24V-
24V+
24V-
LN
75(2.95)
90(3.5)
60(2.36)
7.5(0.3)
4(0.16)
4(0.16)
7.5(0.3)
52(2.05)
98(3.85)
Mass Approximately 0.3 kg
Outer color Munsell 0.08GY/7.64/0.81
DIN rail 35mm(1.38)
Unit mm(inches)
2-f4.5
(0.18)
3. GENERAL SPECIFICATIONS
Item Description
Operating Tempera-
ture 0 to 55 °C (32 to 131 °F)
Storage Temperature -20 to 70 °C (-4 to 158 °F)
Operating Humidity 35 to 85% Relative Humidity, No condensation
storage Humidity 35 to 90% Relative Humidity, No condensation
Vibration Resistance
- Direct Mounting
10 - 57 Hz: 0.75 mm Half Amplitude
57 - 150 Hz: 9.8 m/s2Acceleration
Sweep Count for X, Y, Z: 10 times (80 min in each direction)
Vibration Resistance
- DIN rail Mounting
10 - 57 Hz: 0.035 mm Half Amplitude
57 - 150 Hz: 4.9 m/s2Acceleration
Sweep Count for X, Y, Z: 10 times (80 min in each direction)
Shock Resistance 147m/s2Acceleration, Action Time: 11 ms
3 times in each direction X, Y, and Z
Noise Immunity 1000Vp-p, 1microsecond, 30 - 100 Hz, tested by noise simulator
Dielectric Withstand
Volta ge 500V AC > 1 min, tested between all points, terminals and ground
Insulation Resistance 5MΩ> at 500V DC, tested between all points, terminals and ground
Ground Class 3 (100 Ωor less)
Common grounding
(good)
Common grounding
(not allowed)
Dedicated grounding
(best)
PLC/power
supply
Another
equipment
PLC/power
supply
Another
equipment
PLC/power
supply
Another
equipment
4. PERFORMANCE SPECOFOCATIONS
*1 The available output current varies depending on the ambient operating temperature. Use the FX2N-
20PSU in the available range in accordance with the output derating graph shown above.
*2 If the output current flows beyond the specified value, the overcurrent protection circuit is actuated
and the output voltage drops.
When the overcurrent status or the short-circuit status returns to acceptable levels, the output voltage
automatically recovers.
*3 If the voltage beyond the specified value is generated by an internal failure, etc., the output is shut
down so that high voltage is not output. When the voltage comes from a load circuit connected to an
output terminal or when overvoltage is input from the outside, the overvoltage protection circuit may
be actuated.
When the overvoltage protection circuit is actuated, the output is shut down and does not automati-
cally recover. Ask for inspection and repair after such an occurance.
Input
Input voltage 85 to 264V AC
Frequency 50/60Hz
Fuse rating 3.15A (built in)
Rush current 60A/200V AC maximum
Output
Output voltage 24V DC ± 10%
Output current 2A (maximum), 0.2A (minimum)
(Derating is performed if ambient temperature exceeds 40 °C.)*1
Ripple noise 500mVp-p or less
Holding time 10ms/100V AC
Protection
function
Protection against
overcurrent *2
Actuated when current becomes 110 - 160% or more, voltage drop
occurs automatic recovery
Protection against
overvoltage *3
Actuated when voltage becomes 110 - 140% or more, output shuts-
down, no automatic recovery (diode clamp)
Output indication Green LED(POWER) is lit while voltage is output.
Others Serial/parallel operation with other power supply units is not allowed.
(See Section 6.3)
0
010 20 30 40 50 55
20
40
60
80
100
Ambient temperature (°C)
Load ratio (%)
[Output derating]
Guidelines for the safety of the user and protection of the FX2N-20PSU DC
POWER SUPPLY UNIT
• This manual has been written to be used by trained and competent personnel. This is defined
by the European directives for machinery, low voltage and EMC.
• If in doubt at any stage during the installation of the FX2N-20PSU always consult a profes-
sional electrical engineer who is qualified and trained to the local and national standards. If in
doubt about the operation or use of the FX2N-20PSU please consult the nearest Mitsubishi
Electric distributor.
• Under no circumstances will Mitsubishi Electric be liable or responsible for any consequential
damage that may arise as a result of the installation or use of this equipment.
• All examples and diagrams shown in this manual are intended only as an aid to understand-
ing the text, not to guarantee operation. Mitsubishi Electric will accept no responsibility for
actual use of the product based on these illustrative examples.
• Owing to the very great variety in possible application of this equipment, you must satisfy
yourself as to its suitability for your specific application.

HEAD OFFICE
HIMEJI WORKS
: TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
: 840, CHIYODA CHO, HIMEJI, JAPAN
5. INSTALLATION
Cautions on installation
• Use the unit in the environment for the general specifications described in Section 3 in the
manual.
Never use the unit in a place with dust, soot, conductive dusts, corrosive gas or flammable gas,
place exposed to high temperature, dew condensation, rain and wind, or in a place exposed to
vibration or impact.
If the unit is used in such a place, electrical shock, fire, malfunction, damages in the unit or
deterioration of the unit may be caused.
• Never drop cutting chips or electric wire chips into the ventilation window while drilling screw
holes or wiring cables.
Such chips may cause fire, failure or malfunction.
• After finishing installation, remove a dust preventing sheet adhered on the ventilation window.
If the sheet remains attached, fire, failure or malfunction may be caused.
Note
✩During the installation/wiring work, place a dust preventing sheet on the ventilation window.
✩In order to prevent temperature rise, never install the unit on the floor surface, on the ceiling surface or
in the vertical direction.
Make sure to install the unit on a panel face in the horizontal direction as shown in the figure below.
✩Use crimp-style terminals of the dimensions shown in the figure below.
✩Tighten terminals at a torque of 0.5 to 0.8 Nxm. Securely tighten terminals so that malfunction does not
occur.
For M3(0.12in)
Max. 6.2mm (0.24in)
Max. 6.2mm (0.24in)
[Installation direction] [Crimp-style terminal]
6. WIRING
Cautions on wiring
• Make sure to shut down the power supplies of all phases on the outside before starting instal-
lation or wiring.
If the power supplies are not shut down, you may get electrical shock or the unit may be dam-
aged.
• Make sure to attach terminal covers offered as accessories before supplying power and start-
ing operation after the installation/wiring work.
• Correctly supply power to the PLC in accordance with "Cautions on Safety" described in the
manual of the PLC.
If power is not correctly supplied, the unit may be damaged.
• Connect the wiring of the DC power supply to dedicated terminals as described in this manual.
If the AC power supply is connected to a DC power terminal, the unit may be burnt.
• Never perform external wiring to unused terminals . Such wiring may damage the unit.
• Perform Class 3 grounding to the grounding terminal in the unit. However, never perform com-
mon grounding (See Section 3) with a strong power system.
•
6.1 When FX2N-20PSU is connected to 24V DC power type PLC
24+ 24-
L N 24V 0V X1 X2 X5
PLC
Sensor 1 Sensor 2
Class 3
grounding
85 to 264V AC
FX2N-20PSU
S/S X7
24+ 24-
L N 24V 0V X1 X2 X5
PLC
Sensor 1 Sensor 2
Class 3
grounding
85 to 264V AC
FX2N-20PSU
S/S X7
Source inputs (-ve S/S)
Sink inputs (+ve S/S)
6.2 When FX2N-20PSU is used together with 24V DC service power supply built in PLC
In the AC power type FX PLC, a 24V DC service power supply is built.
When using the FX2N-20PSU and the service power supply together, connect the "24-" terminal of the
FX2N-20PSU and the "COM" terminal on the minus side of the service power supply as shown in the fig-
ure below.
24+ 24-
L N
Class 3
grounding
85 to 264V AC
FX2N-20PSU
Connect the minus line to share it.
L N X1 X2 X5
PLC
S/S X724V 0V
24V
Service
power supply
Sensor 1 Sensor 2
24+ 24-
L N
Class 3
grounding
85 to 264V AC
FX2N-20PSU
Connect the minus line to share it.
L N X1 X2 X5
PLC
S/S X724V 0V
24V
Service
power supply
Sensor 1 Sensor 2
Source inputs (-ve S/S)
Sink inputs (+ve S/S)
6.3 Cautions
Cautions on design
• Never connect in serial nor parallel the DC output terminals of the FX2N-20PSU to another
power supply unit.
Such a connection may damage the unit.
✩Never connect the FX2N-20PSU in parallel to another power supply unit.
✩Never connect the FX2N-20PSU serially to another power supply unit.
24+ 24-
FX2N-20PSU FX2N-20PSU or
another power
supply unit
+-
24+ 24-
FX2N-20PSU FX PLC
Service power
supply
24V 0V
24+ 24-
FX2N-20PSU FX2N-20PSU or
another power
supply unit
+-
24+ 24-
FX2N-20PSU FX PLC
Service power
supply
24V 0V
7. TROUBLESHOOTING
When it is suspected that the FX2N-20PSU is not normally operating, check the following items.
• Check the POWER LED status.
[When the POWER LED is extinguished]
- Check the input voltage of the FX2N-20PSU.
If any abnormality is detected →Input the specified supply voltage.
- Disconnect the wiring from the output terminals "24+" and "24-".
If the POWER LED lights →The overcurrent protection circuit (See Section 4) is actuated.
Investigate the load connected to the output terminals.
If the POWER LED remains extinguished →The overvoltage protection circuit (See Section 4)
may be actuated. Ask for inspection and repair.
[When the POWER LED is lit]
- Check the input voltage of the FX2N-20PSU.
If any abnormality is detected →Input the specified supply voltage.
- Check the external wiring.
If any abnormality is detected →Correct the wiring (See Section 6).
• The overcurrent protection circuit and the overvoltage protection circuit are built in the FX2N-20PSU.
If such a protection circuit is actuated, the output voltage drops or is shut down. For details, refer to
Section 4.
Manual number : JY992D85101
Manual revision : B
Date : SEP. 2008
JY992D85101B
Effective SEP. 2008
Specifications are subject to
change without notice