4 rs-485 cable connection, Rs-485 cable connection, One to one configuration : 4-wire system – Toshiba SX 2000 User Manual
Page 48: One to one configuration : 2-wire system
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1.4 Free ASCII mode
1.4.4
RS-485 cable connection
Cable connection examples show as below.
• Use shielded twisted-pair cable for data communication suited to RS-485
standard. The cable shield should be connected to single -point ground.
One to one configuration : 4-wire system
S2T
Shielded twisted-pair cable
1 km max.
Serial ASCII device
TXA
____ A...................... ....................................... A_____
RXA
1 XX
TXB
RXB
RXA
TXA
>
ZD0(
TERM
RXB
TXB
SG
SG
1 ............................................................................................... 1/
R: 1/2 W-120 £2
• S2T, removable terminal block is provided for cable connection.
• Short between RXA and TERM for termination at the S2T.
• Connect termination resistor 1/2 W - 120 Q between RXA and RXB at the serial
ASCII device.
One to one configuration : 2-wire system
S2T
Shielded twisted-pair cable
Serial ASCII device
On the S2T, removable terminal block is provided for cable connection.
Short between RXA and TERM for termination at the S2T.
Connect termination resistor 1/2 W - 120 Q between RXA and RXB at the serial
ASCII device.
6F8C0926
31