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4.1.1
Local Line Interface
The Local Line interface to TIWAY I is a female 9-pin "D" connector shown as
Ports 1 and 2 in Figure 4–1. Port 1 is the primary network port. Port 2 provides
support for redundant media transmission when Ports 1 and 2 are connected to
a redundant twisted pair cable network (discussed further in Paragraph 4.2 ).
The pin assignments for these ports are given in Table 4–2.
UNILINK HOST ADAPTER
USER MANUAL
THE TIWAY I NETWORK PORTS
Port 1
Port 2
Port 3
Local Line Interface Ports
Figure 4–1 Local Line Interface Ports
Table 4–2 Local Line Connector Pin Assignments
Pin
Name
1
2
3
Sheild
4
5
6
LLM+
7
8
9
LLM–
Port 4
Description
Reserved
Reserved
Cable shield and signal common
Reserved
Reserved
Positive biased signal line
Reserved
Reserved
Negative biased signal line
4-2
I/O
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