Factory Automation

MELSEC-F series Non-protocol communication

Features

MELSEC iQ-F Series modules can communicate with printers, code readers, measurement instruments, etc. having the interface in accordance with RS-232C/RS-485 (RS-422). Communication is performed using sequence programs.

Applicable communication device

RS-232C communication device

Model Features/Communication method Applicable FX PLC
FX
3S
FX
3G
FX
3U
FX
3GC
FX
3UC
Function expansion board
FX3G-232-BD
  1. Function expansion board that can be added to the PLC
    1. 1)Number of channels: 1
    2. 2)Communication method: Full-duplex bidirectional
    3. 3)Insulation: Not insulate
    4. 4)Maximum transmission distance: 15 m
    5. 5)Control instruction: RS/RS2 instruction
*8

Max.
1 unit

Max.
2 units
*1
× × ×
FX3U-232-BD
  1. Function expansion board that can be added to the PLC
    1. 1)Number of channels: 1
    2. 2)Communication method: Full-duplex bidirectional
    3. 3)Insulation: Not insulate
    4. 4)Maximum transmission distance: 15 m
    5. 5)Control instruction: RS/RS2 instruction
× ×
Max.
1 unit
× *2

Max.
1 unit
Specific adapter
FX3U-232ADP-MB
  1. Special adapter that connects to the left side of the PLC
    1. 1)Number of channels: 1
    2. 2)Communication method: Full-duplex bidirectional
    3. 3)Insulation: Insulate
    4. 4)Maximum transmission distance: 15 m
    5. 5)Control instruction: RS/RS2 instruction
*9

Max.
1 unit
*3

Max.
2 units
*1
*4

Max.
2 units

Max.
2 units
*4

Max.
2 units
Specific block
FX2N-232IF

To be discontinued
2024/03

  1. Communication block that can expands functionality as a special function block of the PLC
    1. 1)Number of channels: 1
    2. 2)Communication method: Full-duplex bidirectional
    3. 3)Insulation: Insulate
    4. 4)Maximum transmission distance: 15 m
    5. 5)FROM/TO instruction
× ×
Max.
8 units
× *5

Max.
8 units
*6
PLC built-in
FX3G, FX3GC
built-in
RS-422 port
  1. PLC main unit built-in RS422 port
    1. 1)Number of channels: 1
    2. 2)Communication method: Full-duplex bidirectional
    3. 3)Maximum transmission distance: 15 m
        (RS232 communication part only)
    4. 4)RS2 instruction
- *7
- *7
-
  • *1FX3G 14 pt, 24 pt models: 1 board. 40 pt, 60 pt models: 2 boards.
  • *2Can be connected only to the FX3UC-32MT-LT(-2).
  • *3When connecting to FX3G, FX3G-CNV-ADP is required.
  • *4When connecting to FX3U, FX3UC-32MT-LT(-2), function expansion board is required.
  • *5When connecting to FX3UC, FX2NC-CNV-IF or FX3UC-1PS-5V is required.
  • *6For FX3UC-32MT-LT(-2), 7 units. For FX3UC-**MT/D, FX3UC-**MT/DSS, and FX3UC-16MR/D(S)-T, 8 units.
  • *7FX-232AW, FX-232AWC, or FX-232AWC-H is required.
  • *8Function expansion board and FX3S-CNV-ADP cannot be used together.
  • *9When connecting to FX3S, FX3S-CNV-ADP is required.

RS-485 communication device

Model Features/Communication method Applicable FX PLC
FX
3S
FX
3G
FX
3U
FX
3GC
FX
3UC
Function expansion board
FX3G-485-BD
  1. Function expansion board that can be added to the PLC
    1. 1)Number of channels: 1
    2. 2)Communication method: Half-duplex bidirectional
    3. 3)Insulation: none
    4. 4)Maximum transmission distance: 50 m
    5. 5)Control instruction: RS/RS2 instruction
*5

Max.
1 unit

Max.
2 units
*1
× × ×
FX3G-485-BD-RJ
  1. Function expansion board that can be added to the PLC
    1. 1)Number of channels: 1
    2. 2)Communication method: Half-duplex bidirectional
    3. 3)Insulation: none
    4. 4)Maximum transmission distance: 50 m
    5. 5)Control instruction: RS/RS2 instruction
*5

Max.
1 unit

Max.
2 units
*1
× × ×
FX3U-485-BD
  1. Function expansion board that can be added to the PLC
    1. 1)Number of channels: 1
    2. 2)Communication method: Half-duplex bidirectional
    3. 3)Insulation: Not insulate
    4. 4)Maximum transmission distance: 50 m
    5. 5)Control instruction: RS/RS2 instruction
× ×
Max.
1 unit
× *2

Max.
1 unit
Specific adapter
FX3U-485ADP-MB
  1. Special adapter that connects to the left side of the PLC
    1. 1)Number of channels: 1
    2. 2)Communication method: Half-duplex bidirectional
    3. 3)Insulation: Insulate
    4. 4)Maximum transmission distance: 500 m
    5. 5)Control instruction: RS/RS2 instruction
*6

Max.
1 unit
*3

Max.
2 units
*1
*4

Max.
2 units

Max.
2 units
*4

Max.
2 units
  • *1FX3G 14 pt, 24 pt models: 1 board. 40 pt, 60 pt models: 2 boards.
  • *2Can be connected only to the FX3UC-32MT-LT(-2).
  • *3When connecting to FX3G, FX3G-CNV-ADP is required.
  • *4When connecting to FX3U, FX3UC-32MT-LT(-2), function expansion board is required.
  • *5Function expansion board and FX3S-CNV-ADP cannot be used together.
  • *6When connecting to FX3S, FX3S-CNV-ADP is required.

System configuration example

RS-232C communication device

RS-232C communication device
  • *1Function expansion board can be connected only to the FX3UC-32MT-LT(-2).
  • *2For FX3UC-**MT/D and FX3UC-**MT/DSS, maximum 8 units. For FX3UC-32MT-LT(-2), maximum 7 units.

RS-485 communication device

RS-485 communication device
  • *1Function expansion board can be connected only to the FX3UC-32MT-LT(-2).