Mitsubishi Electric GOT1000 Series Connection Manual page 236

RS485 connection diagram 22)
GOT
* 1 * 2
side
SDA
SDB
RDA
RDB
SG
*1 Terminating resistor should be provided for a GOT and a temperature controller which will be a terminal.
*2 Set the 2-wire/4-wire terminating resistor setting switch of the RS-232/485 signal conversion adaptor as follows.
2-wire type/4-wire type : 4-wire type (2Pair)
Terminating resistor
*3 Connect FG grounding to the appropriate part of a cable shield line.
8 - 24
8. CONNECTION TO YOKOGAWA TEMPERATURE CONTROLLER
8.3 Connection Diagram
Temperature controller
RX+
RX-
TX+
TX-
SG
* 3
Terminating resistor (100Ω 1/2W)
: OPEN
1.4.4 Setting the RS-232/485 signal conversion adaptor
Temperature
* 1
controller
RX+
RX-
TX+
TX-
SG
* 3
* 1
* 1