Toshiba Tosvert RS485 Instruction Manual page 35

Wiring (2-wire RS485 communication)
Master
CN1
Pin-4 RXD+/TXD+
RXD-/TXD-
Pin-5
Pin-8 SG
(Pin-3)
* Never use pin-7 (P11).
Wiring (4-wire RS485 communication)）
Master
CN1
Pin-4
Pin-5
Pin-3
Pin-6
Pin-8
(Pin-2)
* Never use pin-1 (Open) and pin-7 (P11).
* You do not need to connect the master receive lines (pins 4 and 5) or the slave send lines (pins 3
and 6).
Straight
Slave
RXD+/TXD+
RXD-/TXD-
SG
Cross
Slave
RXA RXA
RXB
RXB
TXA TXA
TXB TXB
SG SG
Straight
Slave
RXD+/TXD+
RXD-/TXD-
SG
Straight
Slave
RXA
RXB
TXA
TXB
SG
34
E6581315
Straight
Slave
RXD+/TXD+
RXD-/TXD-
SG
Terminating resistance
120Ω-1/2W
Straight
Slave
RXA
RXB
TXA
TXB
SG
Terminating resistance
120Ω-1/2W