Omron V720S Series Operation Manual page 51

Wiring Method
1) Example of wiring for 1-to-1 connection
Host 上位機器
Terminal resistance
終端抵抗220Ω
220Ω is on
あり
2) Example of wiring for 1-to-N connection
Host
上位機器
Terminal
終端抵抗220Ω
resistance 220Ω
あり
is on
4-12
＋
－
Note Be sure to turn on the terminal resistance on both the host and Reader/Writer
sides.
＋
－
Note When you connect more than one Reader/Writer, turn on the terminal resis-
tance for the Reader/Writer that is located farthest from the host and the
terminal resistance for the host. The terminal resistance for all the other
Reader/Writers must be off.
V720S-BC5D4
V720-BC5D1
COM1
4
5
4
COM2
5
V720S-BC5D4
V720-BC5DI
COM1
4
5
4
COM2
5
V720S-BC5D4
V720-BC5DI
4
COM1
5
4
COM2
5
V720S-BC5D4
V720-BC5DI
4
COM1
5
4
COM2
5
Terminal resistance
終端抵抗220Ω
220Ω is on
あり
First
Reader/Writer
Terminal
終端抵抗220Ω
resistance 220Ω
なし
is off
Second
Reader/Writer
Terminal
終端抵抗220Ω
resistance 220Ω
なし
is off
Terminal
終端抵抗220Ω
resistance 220Ω
あり
is on
Section 4-4
1台目
1台目
Nth
n台目
Reader/Writer
（最大 32台）
(max. 32)