Setting Of Terminator - Contec COM-2PD-LPE User Manual

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 board are 100Ω resistors.
SW2 sets the terminator for channel 1, SW3 for channel 2,
Setting Procedure
If you wish to use a terminator of other than 100Ω, set the terminator switch 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
[Term ON]
MODE
ON
Setting
1 2 3
method
SW2, SW3
Figure 2.4. A or D
(Both terminators of the line)
- Falf-duplex
Terminator
(Bit9)
(A) (B)
Figure 2.4. Multi Drop Connection
COM-2PD-LPE
Inserted
TERM
4 5 6 7 8 9 10
RxD TxD
CTS RTS
Terminator
(Bit9)
(C) (D)
Not inserted
[Term OFF]
MODE TERM
ON
1 2 3 4 5 6 7 8
SW2, SW3
RxD TxD
CTS RTS
Factory setting
Figure 2.4. B or C
(Other than both terminators
of the line)
[A or D]
Inserted
MODE TERM
ON
1 2 3 4 5 6 7 8 9 10
SW2, SW3
RxD TxD
CTS RTS
[B or C]
Not inserted
MODE TERM
ON
1 2 3 4 5 6 7 8 9 10
SW2, SW3
RxD TxD
CTS RTS
9 10
Not inserted
MODE
ON
1 2 3 4 5 6 7
SW2, SW3
RxD TxD
2. Setup
TERM
8 9 10
CTS RTS
13