TOHO ELECTRONICS TTM-00BT - Manual (Page 31)

31
7.9.15 Communication wiring
1) Connecting the RS-485 line
Ｔ／Ｒ（ Ａ）
Ｔ／Ｒ（ Ｂ）
Ｔ／Ｒ（ Ａ）
Ｔ／Ｒ（Ｂ）
Ｔ／Ｒ（ Ａ）
Ｔ／Ｒ（Ｂ）
Ｔ／Ｒ（ Ａ）
Ｔ／Ｒ（Ｂ）
上位コンピュータ（ 親局） 本器（ 子局）
本器（ 子局）
本器（ 子局）
Install an end of line resistor at both of the farthest devices in the parent station and the mobile unit.
For a resistance value, use one that matches the characteristic impedance of the cable. Provided
that the synthesis is set to at least 75
Ω
.
2) Connecting the RS-232C
Ｒ
Ｔ
Ｒ
Ｔ
ＳＧ ＳＧ
In practice, it is necessary to connect the CS (transmission enable) and the ER (data terminal
ready), and connect the RS (transmission request) and DR (data set ready) and CD (reception
carrier detection) inside the connectors of the parent station.
High-level computer (parent stations) This product (mobile unit)
This product (mobile unit)
This product (mobile unit)
High-level computer (parent stations) This product (mobile unit)