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USER’S GUIDE

JY992D74901G

This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX

2N

-2DA special function block and should be read and understood before

attempting to install or use the unit.
Further information can be found in the FX SERIES PROGRAMMING MANUAL(

ΙΙ

), FX

3S

/FX

3G

/FX

3GC

/

FX

3U

/FX

3U C 

Programming Manual, FX

0N

/FX

1N

/FX

2 N

/FX

2N C

/FX

3 G

/FX

3GC

/FX

3U

/FX

3 UC

 SERIES

HARDWARE MANUAL of each PLC.

Compliance with EC directive (CE Marking)

This note does not guarantee that an entire mechanical module produced in accordance with the contents
of this note will comply with the following standards.
Compliance to EMC directive and LVD directive for the entire mechanical module should be checked by
the user/manufacturer. For more information please consult with your nearest Mitsubishi product provider.
Regarding the standards that comply with the main unit, please refer to either the FX series product
catalog or consult with your nearest Mitsubishi product provider.

Requirement for Compliance with EMC directive

The following products have shown compliance through direct testing (of the identified standards below)
and design analysis (through the creation of a technical construction file) to the European Directive for
Electromagnetic Compatibility (2014/30/EU) when used as directed by the appropriate documentation.

Attention

This product is designed for use in industrial applications.

Type: 

Programmable Controller (Open Type Equipment)

Models: MELSEC 

FX

2N

 series manufactured

from December 1st, 1998  FX

2N

-2DA

Caution for EC Directive

The FX

2N

-2DA have been found to be compliant to the European standards in the aforesaid manual and

directive. However, for the very best performance from what are in fact delicate measuring and controlled
output device Mitsubishi Electric would like to make the following points;
As analog devices are sensitive by nature, their use should be considered carefully.
For users of proprietary cables (integral with sensors or actuators), these users should follow those
manufacturers installation requirements.
Mitsubishi Electric recommend that shielded cables should be used. If NO other EMC protection is
provided, then users may experience temporary loss or accuracy between ±10% in very heavy industrial
areas.
However, Mitsubishi Electric suggest that if adequate EMC precautions are followed for the users
complete control system, users should expect accuracy as specified in this manual.

Sensitive analog cable should not be laid in the same trunking or cable conduit as high voltage 
cabling. Where possible users should run analog cables separately.

Good cable shielding should be used. When terminating the shield at Earth - ensure that no earth 
loops are accidentally created.

Standard

Remark

EN61131-2: 2007
Programmable controllers

-

Equipment requirements and tests

Compliance with all relevant aspects of the standard.
EMI
• Radiated Emission
• Conducted Emission
EMS
• Radiated electromagnetic field
• Fast transient burst
• Electrostatic discharge
• High-energy surge
• Voltage drops and interruptions
• Conducted RF
• Power frequency magnetic field

1. INTRODUCTION

The FX

2N

-2DA type analog output block (hereafter referred to as the FX

2N

-2DA) is used to convert a

digital value of 12 bits into an analog output of two points (voltage and current output), and to forward the
values to the Programmable Controller (hereafter referred to as a PLC). 
FX

2N

-2DA can connected to the FX

0N

, FX

1N

, FX

2N

, FX

2NC

, FX

3G

, FX

3GC

, FX

3U

, and the FX

3UC

 series

Programmable Controllers.

1) The analog output is selected from the voltage or current output by the method of connecting wires.

At this time, assume setting to be two channels common analog output.

2) The two analog output channels can accept outputs of 0 to 10V DC, 0 to 5V DC, or 4 to 20mA.

(A mixture of voltage/current output is possible.)

3) Resolution is 2.5mV (0 to 10V DC) and 4

µ

A(4 to 20mA). 

4) The digital to analog conversion characteristics can be adjusted. 

5) The block occupies 8 I/O points which can be allocated from either the inputs or outputs. 

6) The data transfer with the PLC uses the FROM/TO instructions.

FX

3U

/FX

3UC 

series PLC can use direct specification of buffer memory.

2. EXTERNAL DIMENSIONS AND PARTS

Dimensions: mm (inches)

3. WIRING

*1 Connect a 0.1 to 0.47

µ

F 25V DC capacitor respective to position *1 when there is voltage

 ripple in the voltage output or there is a lot of noise. 

*2 For voltage output please short circuit IOUT and COM as shown in the diagram.

*3 Channel number enter 

.

4. CONNECTION WITH PROGRAMMABLE CONTROLLER

1) The FX

2N

-2DA and main unit are connected by a cable on the right of the main unit.

2) Up to 4 FX

2N

-2DA units can connect to the FX

0N

 series PLC, up to 5 for FX

1N, 

up to 8 for FX

2N

/FX

3G

/

FX

3GC

/FX

3U

/FX

3UC

 or, up to 4 for the FX

2NC

 series PLC, all with powered extension units. 

However the following limitation exists when the undermentioned special function blocks are connected.

FX

2N

:

Main unit and powered extension units of 32 points I/O or less. Consumption current available
for undermentioned special function blocks 

≤ 

190mA

FX

2N

:

Main unit and powered extension units of I/O 48 points or more. Consumption current available
for undermentioned special function blocks 

≤ 

300mA

FX

2NC

:

Up to 4 undermentioned special function blocks can be connected regardless of the system I/O.

FX

0N/1N

: Main unit and powered extension units. Up to 2 undermentioned special function blocks can be

connected regardless of the system I/O. 

The consumption of the above units is to be subtracted from the service power supply of the host
PLC.

3) The blocks occupies 8 I/O points (the 8 points can be allocated from either inputs or outputs). 

4) FX

2N

-2DA consumes 5V DC 30mA.

The total 5V consumption of all special function blocks connected to either a main unit or an
extension unit must not exceed the 5V source capacity of the system.

FX

2N

-2DA

FX

2N

-2AD

FX

0N

-3A

Consumption current of 24V DC for one unit 

85mA

50mA

90mA

Mass (Weight): Approx. 0.2kg (0.44lbs) 
Accessories: Special Function block number label

*1

VOUT

IOUT

COM

VOUT

IOUT

COM

Extension
cable

PLC

DC/DC
converter

+15V

-15V

AG

Inverter
etc

Recorder
etc

*3

Current output

Voltage output

FX

2N

-2DA

*2

{

5. SPECIFICATIONS

5.1 General specification

General specifications other than the above are the same as the main unit of the 
Programmable Controller. (Refer to the Hardware manual of the Programmable controller)

5.2 Power supply specification and others

5.3 Defining gain and offset

6. ALLOCATION OF BUFFER MEMORY (BFM)

6.1 Buffer memory

BFM#16: The D/A conversion data of the channel specified with BFM#17 (digital value) is written. 

The D/A data is written in binary in order of the lower 8bit and higher 4bit and divided into two 
portions. 

BFM#17: b0•••The D/A conversion of CH2 begins by changing of 1

0. 

b1•••The D/A conversion of CH1 begins by changing of 1

0. 

b2•••The lower eight bit data for the D/A conversion is held by changing of 1

0. 

Write data in the above-mentioned buffer memory by "8. Program example".

Item

Content

Dielectric withstand 
voltage

500V AC 1min (Between analog output terminals and case)

Item

Content

Analog circuits

24V DC ±10% 85mA (Internal power supplied from the main unit)

Digital circuits

5V DC 30mA (Internal power supplied from the main unit)

Isolation

Photo-coupler isolation between analog and digital circuits.
(No isolation between analog channels.)

Number of occupied 
I/O points

The blocks occupies either 8 input or output points.
(Can be either inputs or outputs)

Item

Voltage output

Current output

Range of analog output

At shipping, the unit is adjusted to a digital range of 0 to 4000 for an analog 
voltage output of 0 to 10V DC. When using an FX

2N

-2DA for current or 

differing voltage output except 0 to 10V DC, it is necessary to adjust the 
offset and gain.

0 to 10V DC, 0 to 5V DC 
(External load resistance 2K to 
1M

)

4 to 20mA
(External load resistance 400

Ω 

or 

less)

Digital input

12bit

Resolution

2.5mV: 10V/4000(At shipment)
Change depending on the output 
characteristic.

4

µ

A: (20-4)A/4000

Change depending on the output 
characteristic.

Integrated accuracy

± 0.1V

± 0.16mA

Processing time

4ms/1 channel (synchronized to be sequence program)

Output characteristics

If a digital source data of greater than 12 bits is used, only the lower 12 bits 
will be valid. Additional (upper) bits will be ignored
Use a digital value within the range from 0 to 4095.
The output characteristic can be set to each of the two channels. 

BFM

number

b15 to b8

b7 to b3

b2

b1

b0

#0 to #15

Reserved

#16

Reserved

Digital source data for output (8 bit)

#17

Reserved

Lower data holding 
bit

CH1 D/A 
conversion 
beginning

CH2 D/A 
conversion 
beginning

#18 or more

Reserved

Digital value

0

4000

10V

Analog value
Digital value

:0 to 10V
:0 to 4000

A

nal

og

va

lu

e

10.238V

40

95

at
shipment

A

nal

og

va

lu

e

Digital value

0

4000

20mA

4mA

Analog value
Digital value

:4 to 20mA
:0 to 4000

20.380mA

40

95

FX

2N

-2DA SPECIAL FUNCTION BLOCK

Summary of Contents for FX2N-2DA

Page 1: ...hen there is voltage ripple in the voltage output or there is a lot of noise 2 For voltage output please short circuit IOUT and COM as shown in the diagram 3 Channel number enter 4 CONNECTION WITH PROGRAMMABLE CONTROLLER 1 The FX2N 2DA and main unit are connected by a cable on the right of the main unit 2 Up to 4 FX2N 2DA units can connect to the FX0N series PLC up to 5 for FX1N up to 8 for FX2N F...

Page 2: ...hen there is voltage ripple in the voltage output or there is a lot of noise 2 For voltage output please short circuit IOUT and COM as shown in the diagram 3 Channel number enter 4 CONNECTION WITH PROGRAMMABLE CONTROLLER 1 The FX2N 2DA and main unit are connected by a cable on the right of the main unit 2 Up to 4 FX2N 2DA units can connect to the FX0N series PLC up to 5 for FX1N up to 8 for FX2N F...

Page 3: ...hen there is voltage ripple in the voltage output or there is a lot of noise 2 For voltage output please short circuit IOUT and COM as shown in the diagram 3 Channel number enter 4 CONNECTION WITH PROGRAMMABLE CONTROLLER 1 The FX2N 2DA and main unit are connected by a cable on the right of the main unit 2 Up to 4 FX2N 2DA units can connect to the FX0N series PLC up to 5 for FX1N up to 8 for FX2N F...

Page 4: ...a CH2 D101 Replace with auxiliary relay M100 to M131 Assign these numbers only once Processing time 4ms 1 channel Time until FX2N 2DA outputs analog value after turning on X000 and X001 8 2 At connection to FX1N FX2N FX2NC FX3G FX3GC FX3U or FX3UC series PLC Digital to analog conversion execution input of CH1 X000 Digital to analog conversion execution input of CH2 X001 At the same time X000 and X...

Page 5: ...a CH2 D101 Replace with auxiliary relay M100 to M131 Assign these numbers only once Processing time 4ms 1 channel Time until FX2N 2DA outputs analog value after turning on X000 and X001 8 2 At connection to FX1N FX2N FX2NC FX3G FX3GC FX3U or FX3UC series PLC Digital to analog conversion execution input of CH1 X000 Digital to analog conversion execution input of CH2 X001 At the same time X000 and X...

Page 6: ...a CH2 D101 Replace with auxiliary relay M100 to M131 Assign these numbers only once Processing time 4ms 1 channel Time until FX2N 2DA outputs analog value after turning on X000 and X001 8 2 At connection to FX1N FX2N FX2NC FX3G FX3GC FX3U or FX3UC series PLC Digital to analog conversion execution input of CH1 X000 Digital to analog conversion execution input of CH2 X001 At the same time X000 and X...

Page 7: ...hen there is voltage ripple in the voltage output or there is a lot of noise 2 For voltage output please short circuit IOUT and COM as shown in the diagram 3 Channel number enter 4 CONNECTION WITH PROGRAMMABLE CONTROLLER 1 The FX2N 2DA and main unit are connected by a cable on the right of the main unit 2 Up to 4 FX2N 2DA units can connect to the FX0N series PLC up to 5 for FX1N up to 8 for FX2N F...

Page 8: ...a CH2 D101 Replace with auxiliary relay M100 to M131 Assign these numbers only once Processing time 4ms 1 channel Time until FX2N 2DA outputs analog value after turning on X000 and X001 8 2 At connection to FX1N FX2N FX2NC FX3G FX3GC FX3U or FX3UC series PLC Digital to analog conversion execution input of CH1 X000 Digital to analog conversion execution input of CH2 X001 At the same time X000 and X...

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