Omron V720S-BC5D4A User Manual page 58

4-6 Wiring Method
1) Example of wiring for 1-to-1 connection
Host
上位機器
Terminal resistance
終端抵抗 2 2 0 Ω
220Ω is on
あり
Be sure to turn on the terminal resistance on both the host and Reader/Writer sides.
2) Example of wiring for 1-to-N connection
Host
Terminal
resistance 220Ω
When you connect more than one Reader/Writer, turn on the terminal resistance 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.
4-16
＋
COM1
COM2
−
Note
COM1
+
−
C0M2
COM1
COM2
COM1
COM2
Terminal resistance setting
V720S-BC5D4A
V720-BC5D1
4
5
4
5
Terminal resistance
終端抵抗220 Ω
220Ω is on
あり
V720S-BC5D4A
4
5
4
5
Terminal
Resistance
V720S-BC5D4A
4
5
4
5
Terminal
resistance 220Ω
V720S-BC5D4A
V720S-BC5D4
4
5
4
5
Terminal
resistance 220Ω
4-6
First Reader/Writer
220
Second
Reader/Writer
Nth Reader/Writer
(max. 31)