Contec N Series, Руководство пользователя

Страница: 16 / 45

2. Setup
COM-4PDHN-USB
11
Setting of Terminator
The terminator setting switch controls whether or not a terminator is inserted into each signal line. Set the
terminators on or off in accordance with the devices with which you are communicating. The terminators
on the product
are 100Ω resistors.
Setting Procedure
If you wish to use a terminator of other than 100Ω, set the bit 1 and 2 of corresponded channels OFF, and
insert an external terminator. The diagrams below show examples of terminator installation for half and
full duplex setting.
Table 2.2. Setting of Terminator
- Half-duplex
Figure 2.2. Party line connection
SW1 - 4
1 2 3 4 5 6
TERM MODE
RxD TxD
ON
Setting
method
Not inserted
[Term OFF]
Figure 2.2 B to C
(Other than both
terminators of the line)
[A or D]
Terminator
(Bit 9)
Terminator
(Bit 9)
(A) (D) (C) (B)
[B or C]
SW2 SW2
SW2
1 2 3 4 5 6
O N
TERM MODE
1 2 3 4 5 6
O N
TERM MODE
1 2 3 4 5 6
O N
TERM MODE
RxD TxD RxD TxD
RxD TxD
Inserted Not inserted
Not inserted
SW1 - 4
SW1 - 4
SW1 - 4