The FX2N-422-BD for RS422 communication board (422BD) can be connected to an FX2N Series programmable
controller, and used as a port for programming and monitoring tools.
When the 422BD is used, two DU Series units can be connected to the FX2N or a DU Series unit and a
programming tool. However, only one programming tool can be connected at once.
Only one 422BD can be connected to a base unit. Also, the 422BD cannot be used together with the
FX2N-485-BD or the FX2N-232-BD.

External Dimensions of Mitsubishi FX2N-422-BD

Dimensions : mm (inches) Accessory : M3 self-tapping screws ´ 2
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Suitable Products and Connecting Cables for Mitsubishi FX2N-422-BD

*1: When using other products or cables please check the product manual for required 5V DC supply.
*2: FX-2PIF can not be connected to the FX2N-422-BD.

Mounting procedure for using Mitsubishi FX2N-422-BD

Specification of Mitsubishi FX2N-422-BD
5.1 General specification of RS422 interface PLC communication Board
General specifications are the same as those for the FX2N series programmable controller.

5.2 Power supply specification of RS422 interface PLC communication Board
The 422BD requires 60mA 5V DC supplied from the programmable controller.
The 5V DC power capacity of the programmable controller is 290 mA maximum. This is used by peripheral units and special function blocks as well as the 422BD. Make sure that the power capacity does not exceed this value. For the details, refer to the hardware manual.
For additional current consumption increases, refer to section 3.

5.3 Performance specification of RS422 interface PLC communication Board

Cautions for using Mitsubishi FX2N-422-BD
1) When using any 422BD, do not use any other communication format or parameters. If the communication format or parameters is set, programming is not possible.
2) Only one programming tool (such as FX-10P, FX-20P, etc.) should be connected to either the programming port or the port provided on the 422BD. If a programming tool is connected to both connectors, the following may occur.
a) The program inside the programmable controller may not be consistent with the program inside the programming tool. If the program is modified or the set value for timers or counters is modified, a part of the program may be damaged and the programmable controller may malfunction.
b) When the sampling trace function of the programmable controller is used from both ports, the correct sampling trace result cannot be obtained.

Diagnostics of Mitsubishi FX2N-422-BD
1) Make sure that the cable connected is correct.
2) Make sure that the programmable controller is connected, and that the POWER LED is on.
3) Make sure that the communication format is in the initial state (D8120 = K0). Check using a peripheral unit how the communication parameters are set. If the no protocol (RS instruction) or the dedicated protocol is selected, set the parameters correctly using the peripheral unit.
4) Make sure that the RS, VRRD or VRSC instruction or N:N network setting program is not used in the program. If such an instruction is used in the program, delete it, turn off the power of the programmable controller, then turn it on again.
5) If the special auxiliary relay M8070 or M8071 is turned on, turn off the relay using the peripheral unit, turn off the power of the programmable controller, then turn on the power again.

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It is 100% compatible with Mitsubishi original FX2N-422-BD.

Part#: FX2N-422-BD

The unit price is USD17.65/pc 

USER'S MUNUAL PDF OF RS422 interface PLC Communication Board FX2N-422-BD:

FX2N-422-BD-USER'S MANUAL

Specification of communication board FX2N-422-BD:

Description of communication board FX2N-422-BD:

• The FX2N-422-BD for RS-422 Communication Board(422BD)can be connected to an FX2N series programmable controller, and used as a port programming and monitoring tools.
• This is a Replacement of Mitsubishi FX2N-422-BD Programmable Controller.
• This is OEM product, not Mitsubishi original part.

More communication boards, please click below links:

FX2N-485-BD+

FX2N-485-BD

FX2N-422-BD

FX2N-232-BD

FX1N-485-BD

FX1N-422-BD

FX3U-485-BD

FX3U-422-BD

FX3U-232-BD

FX3U-USB-BD

FX2N-4DA

More pictures of Communication Board 

Please feel free to contact me for any question!

Contact person: Miss Nancy

The communication board FX2N-232-BD for RS232C (hereinafter referred to as “232BD”) can be connected to the main unit of the FX2N Series programmable controller, and used as the port for the following applications.
(1) To perform data transfer between RS232C devices such as personal computers, bar code readers and printers.
(2) To perform data transfer using the dedicated protocol between RS232C devices. For details of the dedicated protocol, refer to the users manual of the FX-485PC-IF.
(3) To connect a programming tool.
And when the 232BD is used for the application (1) or (2) above, the communication format including the baud rate, the parity and the data length is specified by the parameters or the contents of the special data register D8120 of the FX2N programmable controller.
Only one 232BD can be connected to one base unit. Accordingly, the 232BD cannot be used together with the FX2N-485-BD or the FX2N-422-BD. When two or more RS232C units are required to be connected for the application, use the special block for RS232C communication.

1.1 EXTERNAL DIMENSIONS of Mitsubishi FX2N-232-BD
Dimensions : mm (inches) Accessory : M3 self-tapping screws ´ 2, mounting bracket ´ 2

TERMINAL LAYOUTS of Mitsubishi FX2N-232-BD

The connector is a 9-pin D-SUB type, and the pin configuration is as shown below.

SPECIFICATION of Mitsubishi FX2N-232-BD

3.1 General specification of RS232 interface PLC comunication Board
General specifications is same as those for the FX2N series programmable controller.

3.2 Power supply specification of RS232 interface PLC comunication Board
5 V DC, 60 mA is required from the programmable controller.

3.3 Specification of RS232 interface PLC comunication Board

3.4 Related flag and data registers of RS232 interface PLC comunication Board

3.5 Communication format D8120  of Mitsubishi FX2N-232-BD
To send and receive the data between the RS232C unit using the 232BD, the communication format including the
transmission speed (baud rate) and the parity must be consistent between the 232BD and the RS232C unit.
The communication format can be set using parameters or the contents of special data register D8120 of the FX2N programmable controller. Make sure to set appropriately the communication format in accordance with the RS232C unit used. For the setting method using the parameters of the FX2N programmable controller, refer to the manual of the peripheral unit used.
Make sure to turn off the power of the programmable controller and turn it on again after modifying the setting.

*1 Set to “0" when using the dedicated protocol.
*2 Effective only when no protocol (RS instruction) is selected, and has an initial value of STX (02H: Can be modified by
the user).
*3 Effective only when no protocol (RS instruction) is selected, and has an initial value of ETX (03H: Can be modified by
the user).
*4 Set to (b11, b12) = (1, 0) when using the dedicated protocol.
*5 Set to “0" when using no protocol. 

3.5.1 Example program of setting of Mitsubishi FX2N-232-BD

The control line is set by b12.
b12 = 0 : No hardware hand shaking. Send and receive are controlled by software protocol.
b12 = 1 : Hardware hand shaking. Signal lines ER(DTR)and DR(DSR)are used to control send and receive of data.

WIRING of Mitsubishi FX2N-232-BD

To connect the 232BD to RS232C device use an RS232C cable. Make sure that the shield of cables is connected to
ground (100 W or less).
The connector of the 232BD is 9-pin D-SUB (see Section 1.2 and Chapter 2). The connections of RS232C devices
varies with each device being used. Check the specification of the device, and connect.
4.1 Connection examples
4.1.1 Terminal specification device of RS232 interface PLC comunication Board

4.1.2 Modem specification device of RS232 interface PLC comunication Board

4.1.3 When programming or monitoring of Mitsubishi FX2N-232-BD
Use F2-232CAB-1 and 25-pin D-SUB to 9-pin D-SUB adapter or make a suitable cable.

CAUTION for using Mitsubishi FX2N-232-BD

1) When programming tool is connected the 232BD, do not use any other communication format or parameters. If communication format or parameters is set, programming is not possible.
2) Only one programming tool (such as FX-10P, FX-20P, etc.) should be connected to either the programming port or the port provided on the 232BD. If a programming tool is connected to both connectors, the following may occur.
a) The program inside the programmable controller may not be consistent with the program inside the programming tool. If the program is modified or the set value for the timer or the counter is modified, a part of the program may be damaged and the programmable controller may malfunction.
b) When the sampling trace function of the programmable controller is used from both ports, the correct sampling trace result cannot be obtained.

Our company (Kollewin Technology CO., Limited) have a new product, named FX2N-232-BD.

It is 100% compatible with Mitsubishi original FX2N-232-BD.

Part#: FX2N-232-BD

The unit price is USD17.65/pc  

USER'S MUNUAL PDF of Mitsubishi communication board FX2N-232-BD:

FX2N-232-BD-USER'S MANUAL

Specification of communication board FX2N-232-BD:

Description of communication board FX2N-232-BD:

• Port to transfer the data using the non-procedure method between diversified RS-232C equipment such as personal computer, bar code reader and printer.
• Port to transfer the data using a dedicated protocol between an RS-232C equipment.
• Port to connect a programming tool.
• RS232C interface boards for Mitsubishi FX1N, anti-static and anti-surge.
• This is OEM product, not Mitsubishi original part.

More communication boards, please click below links:

FX2N-485-BD+

FX2N-485-BD

FX2N-422-BD

FX2N-232-BD

FX1N-485-BD

FX1N-422-BD

FX3U-485-BD

FX3U-422-BD

FX3U-232-BD

FX3U-USB-BD

FX2N-4DA

More pictures of Communication Board

Please feel free to contact me for any question!

Contact person: Miss Nancy

• The FX2N-4DA analog special function block has four output channels. The output channels take a digital value and output an equivalent analog signal. This is called a D/A conversion. The FX2N-4DA has maximum resolution of 12 bits.
• The selection of voltage or current based input/output is by user wiring. Analog ranges of -10 to 10V DC (resolution:5mV), and/or 0 to 20mA (resolution: 20mA) maybe selected independently for each channel.
• Data transfer between the FX2N-4DA and the FX2N main unit is by buffer memory exchange. There are 32 buffer memories (each of 16 bits) in the FX2N-4DA.
• The FX2N-4DA occupies 8 points of I/O on the FX2N expansion bus. The 8 points can be allocated from either inputs or outputs. The FX2N-4DA draws 30mA from the 5V rail of the FX2N main unit or powered extension unit.

EXTERNAL DIMENSIONS AND PARTS of Mitsubishi FX2N-4DA

INSTALLATION AND WIRING of Mitsubishi PLC Analogue output module FX2N-4DA

VICONNECTION TO PROGRAMMABLE CONTROLLER of  FX2N-4DA
Various special blocks controlled by the FROM/TO commands, such as the analog input blocks high-speed counter blocks, etc. can be connected to the FX2N programmable controller (MPU), or connected to the right side of the other extension blocks or units. Up to eight special blocks can be connected to a single MPU in the numeric order of No. 0 to No. 7.

WIRING of Mitsubishi PLC Analogue output module FX2N-4DA:

The terminal layout shown below may differ from the actual layout. For the correct terminal layout, refer to
section 2 External Dimensions and Parts.

*1: Use a twisted pair shielded cable for the analog output. This cable should be wired away from power lines or any other lines which could induce noise.
*2: Apply 1-point grounding at the load side of the output cable (class 3 grounding: 100W or less).
*3: If electrical noise or a voltage ripple exists at the output, connect a smoothing capacitor of 0.1 to 0.47mF, 25V.

*4: Connect the terminal on the FX2N-4DA with the terminal on the MPU of the programmable controller.
*5: Shorting the voltage output terminal or connecting the current output load to the voltage output terminal may damage the FX2N-4DA.
*6: The 24V DC service power of the programmable controller can also be used.
*7: Do not connect any unit to the unused terminal
 

SPECIFICATIONS of Mitsubishi PLC Analogue output module FX2N-4DA

 ENVIRONMENTAL SPECIFICATIONS of FX2N-4DA 

 PERFORMANCE SPECIFICATIONS of FX2N-4DA 

ALLOCATION OF BUFFER MEMORIES (BFM) of Mitsubishi FX2N-4DA

Data is transmitted between the FX2N-4DA and the MPU via buffer memories (16-bit 32-point RAM).
Buffer memories marked “W” can be written to using the T0 instruction in the MPU.
The status of BFM #0, #5, and #21, (marked E) will be written to EEPROM, therefore the set values will be retained even after turning off the power.

1 [BFM #0] Output mode select: The value of BFM #0 switches the analog output between voltage and current on each channel. It takes the form of a 4 digit hexadecimal number. The first digit will be the command for channel 1 (CH1), and the second digit for channel 2 (CH2) etc. The numeric values of these four digits respectively represent the following items:

2 [BFM #1, #2, #3 and #4]: Output data channels CH1, CH2, CH3, and CH4
BFM #1: Output data of CH1 (Initial value: 0) BFM #2: Output data of CH2 (Initial value: 0)
BFM #3: Output data of CH3 (Initial value: 0) BFM #4: Output data of CH4 (Initial value: 0)
3 [BFM #5]: Data holding mode: While the programmable controller is in the STOP mode, the last output value in the RUN mode will be held. To reset the value to the offset value, write the hexadecimal value in BFM #5 as follows:

In addition to the above functions, the buffer memories can adjust the I/O characteristics of the FX2N-4DA, and report
the status of the FX2N-4DA to the programmable controller.
Buffer memories marked “W” can be written to using the TO instruction in the MPU.The status of BFM #0, #5, and #21, (marked
E) will be written to EEPROM, therefore the set values will be retained even after turning off the power.
*1:Offset data: Actual analog output value when corresponding output data (BFM #1 through #4) is 0
*2:Gain data: Actual analog output value when corresponding output data (BFM #1 through #4) is +1,000
*3: When current output mode 1 (+4 mA to +20 mA) is set, the offset data will be automatically set to +4,000 and the gain
data to +20,000. When the current output mode 2 (0 mA to +20 mA) is set, the offset data will be automatically set to 0 and the gain data to +20,000.

4 [BFM #8 and #9] Offset/gain setting command: Changes offset and gain values of channels CH1 through CH4 by writing 1 to the corresponding Hex digits of BFM #8 or #9. The current values will be valid until this command is output.

5 [BFM #10 through #17] Offset/gain data: The offset and gain values are changed by writing new data to BFM #10 through #17. The units of the data to be written is mV or mA. The data should be written and then BFM #8 and #9 set. Note that the data value will be rounded down to the nearest 5mV or 20mA.
6 [BFM #20] Initialize: When K1 is written in BFM #20, all values will be initialized to the factory-settings.(Note that the BFM #20 data will override the BFM #21 data.) This initialize function is convenient if you have an error in adjustment.
7 [BFM #21] I/O characteristics adjustment inhibit: Setting BFM #21 to 2 inhibits the user from inadvertent adjustment of I/O characteristics. The adjustment inhibit function, once set, will be valid until the Permit command (BFM #21=1) is set. The initial value is 1 (Permit). The set value will be retained even after power-off.

8 [BFM #29] Error status: When an error occurs, use the FROM command to read out the details of the error.

9 [BFM #30]The identification code for a special block is read using the FROM command.The identification code for the FX2N-4DA unit is K3020.The MPU can use this facility in the program to identify the special block before commencing any data transfer from and to the special block.

Note of Mitsubishi PLC Analogue output module FX2N-4DA:

BFM #’s marked E/(E).
• Values of BFM #0, #5, and #21, (marked E) are stored in EEPROM memory of the FX2N-4DA. BFM #10 to #17 are copied to EEPROM when the gain/offset setting command BFM #8, #9 is used. Also, BFM #20 causes resetting of the EEPROM memory. The EEPROM has a life of about 10,000 cycles (changes), so do not use programs which frequently change these BFMs.
• A mode change of BFM #0 automatically involves a change of the corresponding offset and gain values. Because of the time needed to write the new values to the internal EEPROM memory, a delay of 3 s is required between instructions changing BFM #0 and instructions writing to the corresponding BFM #10 through BFM #17.
Therefore, a delay timer should be used before writing to BFM #10 through #17.

OPERATION AND PROGRAM EXAMPLES of Mitsubishi FX2N-4DA

If the factory-set I/O characteristics are not changed and the status information is not used, you can operate the FX2N-4DA using the following simple program. For the FROM and TO commands, refer to the FX Programming Manual.
CH1 and CH2: Voltage output mode (-10 V to +10 V)
CH3: Current output mode (+4 mA to +20 mA)
CH4: Current output mode (0 mA to +20 mA)

Program example of Mitsubishi FX2N-4DA
For the following program, CH1 and CH2 of the FX2N-4DA connected at special block position No. 1 are used as
voltage output channels, CH3 as a current output channel (+4 mA to +20 mA), and CH4 as a current output channel (0
mA to +20 mA). When the MPU is in STOP, the output will be held. In addition, the status information is used.

Our company (Kollewin Technology CO., Limited) have a new product, named FX2N-4DA.

It is 100% compatible with Mitsubishi original FX2N-4DA.

USER'S MUNUAL PDF of Mitsubishi analogue module FX2N-4DA

Mitsubishi FX_PLC_USER'S Manual FX2N-4DA

Pictures of our compatible Mitsubishi FX2N-4DA：

More Mitsubishi PLC expansion input & output modules we can supply

More communication boards, please click below links:

FX2N-485-BD+

FX2N-485-BD

FX2N-422-BD

FX2N-232-BD

FX1N-485-BD

FX1N-422-BD

FX3U-485-BD

FX3U-422-BD

FX3U-232-BD

FX3U-USB-BD

More pictures of communication board for your reference:

Request for price, please feel free to contact me for any question!

Contact person: Miss Nancy

The communication board FX2N-485-BD for RS485 (hereinafter referred to as “485BD”) can be connected to the base unit of the FX2N Series programmable controller to be used for the following applications.
1) Data transfer using no protocol
Data communication with diversified RS232C units including personal computers, bar code readers and printers can be performed via the RS485 (422) converter using the no protocol. In this application, data is sent or received using the data registers specified by the RS instruction. For the setting and program examples, refer to the FX Programming Manual and FX Communication User’s Manual.
2) Data transfer using the dedicated protocol
Data transfer with RS485 (422) units can be performed on the 1:N basis using the dedicated protocol.
For the contents of the dedicated protocol used in this application, refer to the FX Communication User’s Manual.
3) Data transfer using the parallel link
Data transfer with an FX2N programmable controller can be performed on the 1:1 basis for 100 auxiliary relays and 10 data registers. For the setting and program examples, refer to the FX Communication User’s Manual.
4) Data transfer using the N:N network
Data transfer with FX2N programmable controllers can be performed on the N:N basis. For the setting,the number of transferred data and program examples, refer to the FX Communication User’s Manual.

1.1 External Dimensions of Mitsubishi FX2N-485-BD

1.2 System Configuration of Mitsubishi FX2N-485-BD

1.2.1 No Protocol or Dedicated Protocol of Mistubishi FX2N-485-BD

1.2.2 Parallel Link of Mistubishi FX2N-485-BD

1.2.3 N:N Network of Mistubishi FX2N-485-BD

MUNTING AND WIRING of Mitsubishi FX2N-485-BD

2.1 Mounting Procedure to Mistubishi FX2N-485-BD

2.2  Cable and Terminal Resistor to connect the RS485 FX2N-485-BD

2.2.1 Cable to connect Mistubishi FX2N-485-BD
To connect the RS485 (422) unit, use a shielded twisted-pair cable.
The cable specification must be AWG 26 to 16, and the maximum tightening torque must be 0.6 N·m (6 kgf·cm). If a cable other than the AWG 26 to 16 is used, normal communication cannot be assured because the terminal may be imperfectly contacted. It is recommended to insert a cable integrated by the crimping tool into the terminal.

2.2.2 Terminal Resistor of Mistubishi FX2N-485-BD
Provide the terminal resistor at both ends of the line as described in section 2.3.2 and 2.3.3.
1) In the case of two-pair wiring, connect the terminal resistor (330W, 1/4W) between terminals SDA and SDB as well as between terminals RDA and RDB.

Use the resistors offered as accessories of the 485BD.
2) In the case of one-pair wiring, connect the terminal resistor (110W, 1/2W)between terminals RDA and RDB. Use the resistors offered as accessories of the 485BD.

2.3 Wiring of Mitsubishi FX2N-485-BD

2.3.1 Selection of Wiring of Mistubishi FX2N-485-BD
Wiring of RS485 is one-pair wiring or two-pair wiring. The wiring method is decided according to the
usage. Please select the wiring method from the table below.

*1 When this product is added to the system, please match the wiring to the wiring method of the system.
*2 When using 485BD with, this wiring method remember to take account of/or ignore the “echo” of the commands sent from the FX2N programmable controller.
*3 Use FX2N programmable controller and 485BD together.
*4 For excluding the combination of 485BD, please see below.

2.3.2 Two-pair Wiring

*1 R is the terminating resistance. Connect the terminating resistance (330W) between terminals SDA and SDB, and terminals RDA and RDB.
*2 The shield of the shielded twisted-pair cable must be connected to ground (100W or less). When using parallel link, ground both side. When using no protocol or dedicated protocol, ground one side.
*3 Connect terminal FG to each terminal of the programmable controller main body grounded with resistance of 100 or less. However, for the computer link unit of the A series programmable controller, see the manual of the computer link unit.
*4 When using RS232/485 or RS232/422 interface, please the use FX-485PC-IF.

2.3.3 One-pair Wiring

*1 R is the terminating resistance. Connect the terminating resistance (110W) between terminals RDA and RDB.
*2 The shield of the shielded twisted-pair cable must be connected to ground (100W or less). When using parallel link, ground both side. When using no protocol or dedicated protocol, ground one side.
*3 Connect terminal FG to each terminal of the programmable controller main body grounded with resistance of 100 or less. However, for the computer link unit of the A series programmable controller, see the manual of the computer link unit.
*4 When using RS232/485 or RS232/422 interface, please the use FX-485PC-IF.

SPECIFICATIONS of Mitsubishi FX2N-485-BD

3.1 General Specifications of Mitsubishi FX2N-485-BD
General specifications are the same as those for the FX2N series programmable controller.

3.2 Power Supply Specification of Mitsubishi FX2N-485-BD
5V DC, 60 mA is supplied from the programmable controller.

3.3 Specification of Mitsubishi FX2N-485-BD

DIAGNOSTICS of Mitsubishi FX2N-485-BD

For error code of N:N network and computer link, refer to the FX Communication User’s Manual.

4.1 Common Items
1) Check the connection with the communication unit of the programmable controller and the wiring.
When the connection is unstable, the communication can not be corrected.
2) Check whether the VRRD or VRSC instruction is used in used in the program.
If it is used, delete it, turn off the power of the programmable controller, then turn it on again.
3) Each setting of communication format (D8120), parameter of programmable controller by FX-PCS/WIN-E, N:N network (D8173 to D8180) and parallel link (M8070, M8071) is suitable for the usage or it checks. The communication is not correctly done if setting is not suitable for the usage.
When each setting is changed, please turn off the power supply of the programmable controller, and turn it on again.
4) When you use FX0N-485ADP or FX-485ADP in network, please the power supply for the drive must be supplied correctly or check.

4.2 LED Check Items of Mitsubishi FX2N-485-BD
4.2.1 N:N Network
1) Check the status of the RD LED and the SD LED provided on each 485BD.
- If both of them are lit and extinguished, nothing is wrong.
- If the RD LED is lit/extinguished but the SD LED is not lit/extinguished (not lit at all), check the setting of the station No.,the baud rate (transmission rate) and the total number of salve stations.
- If the RD LED is not lit/extinguished, check the wiring.
2) Make sure that the communication error (FX2N: M8183 to M8190, FX0N: M504 to M511) in each slave station is not turned on and that the data communication flag (FX2N: M8191, FX0N: M503) is not turned off. When one of the communication error flag is turned on or if the data communication flag is turned off, check the error code of data registers (FX2N: D8211 to D8218, FX0N: D211 to D218).

For the error code, please see the FX Communication User’s Manual. 

4.3 Parallel Link
1) Check the status of the RD(RXD) LED and the SD(TXD) LED provided on each communication unit.
- If both of them are lit and extinguished, nothing is wrong.
- If the RD(RXD) LED is lit/extinguished but the SD(TXD) LED is not lit/extinguished (not lit at all),check the setting of the master station and the slave stations.
- If the RD(RXD) LED is not lit/extinguished, check the wiring.
2) Make sure that the master station and the slave stations are set correctly. If the setting is incorrect,correct it.
3) Make sure that the devices for the master station and the slave stations are handled correctly. If they are handled incorrectly, correct the program so that they are handled correctly.

4.4 Computer Link
1) Check the status of the RD(RXD) LED and the SD(TXD) LED provided on each communication unit.
- If both of them are lit and extinguished, nothing is wrong.
- If the RD(RXD) LED is lit/extinguished but the SD(TXD) LED is not lit/extinguished (not lit at all),check the setting of the station No. and the transmission rate (baud rate).
- If the RD(RXD) LED is not lit/extinguished, check the wiring and confirm the connection with the programmable controller.
2) Make sure that the communication procedure is performed correctly. If it is not performed correctly,correct the setting in the computer.
3) Check the NAK error code and programmable controller error code.
For the error code, please see the FX Communication User’s Manual.

4.5 RS Instruction
1) Check the status of the RD (RXD) LED and the SD (TXD) LED provided in an optional equipment.
- If the RD (RXD) LED is not lit while data is received or the SD (TXD) LED is not lit while data is sent, check the installation and the wiring.
- When the RD (RXD) LED is lit while data is received or the SD (TXD) LED is lit while data is sent, the installation and the wiring are correct.
2) Make sure the timing of data send/receive. For example, make sure that the counterpart equipment is ready for receive before starting to send data to it.
3) When the terminator is not used, check whether the send data capacity is equivalent to the acceptable data capacity. If the send data capacity may be changed, use the terminator.
4) Make sure that the external equipment is correctly operating.
5) Check whether the type of send data and the type of receive data are equivalent. If they are different,make them equivalent.
6) When two or more RS instructions are used in the program, make sure that only one RS instruction is actuated in one operation cycle. Never turn off the RS instruction while data is received or sent.
7) In the FX2N Series (V2.00 or later), an RS instruction is not executed if the counterpart equipment receives “NAK”.
Arrange the system so that the RS instruction is executed even if the counterpart equipment receives “NAK”.

Our company (Kollewin Technology CO., Limited) have new products.

Named FX2N-485-BD & FX2N-485-BD+ .

They are 100% compatible with Mitsubishi original FX2N-485-BD.

Part#: FX2N-485-BD

The unit price is USD21.00/pc 

Part#:FX2N-485-BD+

The unit price is USD62.89/pc

USER'S MUNUAL PDF of communication board FX2N-485-BD

FX2N-485-BD-USER'S MANUAL

Specification of communication board FX2N-485-BD:

Description of communication board FX2N-485-BD:

• FX2N are suitable for use with FX2N PLC's. FX2N-232-BD are used for RS-485 applications, such as communication with a PC, printer or bar code reader. and provide a second programming port which enables an operator panel (or HMI) and a programming panel to be connected to the PLC at the same time.
• This is a Replacement of Mitsubishi FX2N-485-BD Programmable Controller.
• This is OEM product, not Mitsubishi original part.

More communication boards, please click below links:

FX2N-485-BD+

FX2N-485-BD

FX2N-422-BD

FX2N-232-BD

FX1N-485-BD

FX1N-422-BD

FX3U-485-BD

FX3U-422-BD

FX3U-232-BD

FX3U-USB-BD

FX2N-4DA

More pictures of PLC communication board 

Please feel free to contact me for any question!

Contact person: Miss Nancy