MELSEC-F series

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

*1: FX3G 14pt, 24pt models: 1 board. 40pt, 60pt models: 2 boards.
*2: Can be connected only to the FX3UC-32MT-LT(-2).
*3: Function 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)Number of channels: 1 2)Maximum transmission distance: Max. length 3 m 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)Number of channels: 1 2)Insulation: insulate 3)Maximum transmission distance: Max. length 5 m (3 m Cable included) 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）Applicable peripheral devices   ・PC programming software   ・HMI RS-232C connection 2)Number of channels: 1 3)Insulation: Not insulate 4)Maximum transmission distance: 15 m 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)Applicable peripheral devices   ・PC programming software   ・HMI RS-232C connection 2)Number of channels: 1 3)Insulation: insulate 4)Maximum transmission distance: 15 m 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

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

System configuration example

RS-422 communication device

*1：Can be connected only to the FX3UC-32MT-LT(-2).

<Connection cable>
　Please use the designated RS-422 cable (MINI DIN 8-pin type on the PLC side) for each peripheral device.

USB communication device

*1：Can be connected only to the FX3UC-32MT-LT(-2).

RS-232C communication device

*1：Can be connected only to the specific adapter.
*2：function expansion board can be connected only to the FX3UC-32MT-LT(-2).

<Connection cable>
　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.