Factory Automation

MELSEC-F series Peripheral equipment communication

Features

Using RS-422, USB, or RS-232C communication devices, the connection port for peripheral devices can be added.
Devices for sequence programming including a personal computer and display units (GOT) can be connected to the added port.

Applicable communication device

RS-422 communication device

Model Features/Communication method Applicable FX PLC
FX
3S		 FX
3G		 FX
3U		 FX
3GC		 FX
3UC
Function expansion board
FX3G-422-BD

Function expansion board that can be added to the PLC

Performs the same communication as the PLC's built-in RS-422 port for peripheral device connection.

 *3
○
Max.
1 unit		 ○
Max.
2 units
*1		 × × ×
FX3U-422-BD × × ○
Max.
1 unit		 × *2
○
Max.
1 unit
  • *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).
  • *3Function expansion board and FX3S-CNV-ADP cannot be used together.

USB communication device

Model Features/Communication method Applicable FX PLC
FX
3S		 FX
3G		 FX
3U		 FX
3GC		 FX
3UC
PLC built-in
FX3S, FX3G, FX3GC
USB port

PLC main unit built-in USB port

Connects to a PC having USB interface for programming or monitoring.

  1. 1)Number of channels: 1
  2. 2)Maximum transmission distance: Max. length 3 m
  3. 3)Control method: Programming communication
 ○
Built-in		 ○
Built-in		 - ○
Built-in		 -
Function expansion board
FX3U-USB-BD

Function expansion board that can be added to the PLC

Connects to a PC having USB interface for programming or monitoring.

  1. 1)Number of channels: 1
  2. 2)Insulation: insulate
  3. 3)Maximum transmission distance: Max. length 5 m (3 m Cable included)
  4. 4)Control method: Programming communication
 × × ○
Max.
1 unit		 × *
○
Max.
1 unit
  • *Can be connected only to the FX3UC-32MT-LT(-2).

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

Function expansion board that can be added to the PLC

Can directly connect to a PC or HMI having RS-232C interface.

  1. 1）Applicable peripheral devices
    • ・PC programming software
    • ・HMI RS-232C connection
  2. 2)Number of channels: 1
  3. 3)Insulation: Not insulate
  4. 4)Maximum transmission distance: 15 m
  5. 5)Control method: Programming communication
 *5
○
Max.
1 unit		 ○
Max.
2 units
*1		 × × ×
FX3U-232-BD × × ○
Max.
1 unit		 × *2
○
Max.
1 unit
Specific adapter
FX3U-232ADP-MB

Special adapter that connects to the left side of the PLC

Can directly connect to a PC or HMI having RS-232C interface.

  1. 1）Applicable peripheral devices
    • ・PC programming software
    • ・HMI RS-232C connection
  2. 2)Number of channels: 1
  3. 3)Insulation: insulate
  4. 4)Maximum transmission distance: 15 m
  5. 5)Control method: Programming communication
 *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-422 communication device

RS-422 communication device
  • *1Can be connected only to the FX3UC-32MT-LT(-2).
  1. <Connection cable>
  2. Please use the designated RS-422 cable (MINI DIN 8-pin type on the PLC side) for each peripheral device.

USB communication device

USB communication device
  • *1Can be connected only to the FX3UC-32MT-LT(-2).

RS-232C communication device

RS-232C communication device
  • *1Can be connected only to the specific adapter.
  • *2function expansion board can be connected only to the FX3UC-32MT-LT(-2).
  1. <Connection cable>
  2. The main connection cables for RS-232C communication devices and peripheral devices are listed below.
    For other combinations, please refer to the FX Series User's Manual (Data Communication Edition).
Function expansion board (FX3G-232-BD/FX3U-232-BD)
Specific adapter (FX3U-232ADP-MB)
DOS/V PC (9-pin D-SUB) FX-232CAB-1
PC-9800 PC (25-pin D-SUB) F2-232CAB-1
PC-9800 PC (14-pin Half-pitch) FX-232CAB-2
GOT Please connect with the designated cable or wiring for RS-232C connection of each HMI.

Concurrent use of peripheral device

Connect an programming tool such as PC software to either one of peripheral devices to avoid programs from being changed by multiple peripheral devices.