2. Setup
16
COM-1(PM), COM-1D(PM)
TxD+
TxD-
RxD+
RxD-
CTS+
CTS-
RTS+
RTS-
RTS
DCD
DTR
DSR
RI
CTS
SIN
SOUT
NS16550
equivalent
1/2W 100
Ω
SW1
13
4
5
6
7
8
2
Figure 2.6. Equivalent Circuit <COM-1D(PM)>
Terminator
(A)
(D)
(C)
Terminator
(B)
Figure 2.7. Party Line Connection <COM-1D(PM)>