Mitsubishi Electric GOT2000 Series Connection Manual page 52

■2. When using a MELSECNET/H communication unit, CC-Link IE Controller Network
communication unit, or CC-Link communication unit (GT15-J61BT13)
Install a MELSECNET/H communication unit, CC-Link IE Controller Network communication unit, or CC-Link
communication unit in the 1st stage of an extension interface.
If a bus connection unit is installed in the 2nd stage or above, the unit cannot be used.
Example: When installing a MELSECNET/H communication unit and a serial communication unit
■3. When using a serial communication unit
A serial communication unit can be installed in any position (1st to 3rd stage) of the extension interface.
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1.3 Option Devices for the Respective Connection
Serial communication unit
MELSECNET/H
communication unit
Serial
communication
unit
MELSECNET/H
communication unit
Serial communication unit
Serial
communication
unit