Siemens SIMATIC TIWAY 1 - Manual (Page 76)

THE TIWAY I NETWORK PORTS
UNILINK HOST ADAPTER 4-2
USER MANUAL
4.1.1 Local Line Interface
Port 1 Port 2 Port 3 Port 4
Local Line Interface Ports
I/O
12345
Figure 4–1 Local Line Interface Ports
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.
Table 4–2 Local Line Connector Pin Assignments
Pin
1
2
3
4
5
6
7
8
9
Name
Sheild
LLM+
LLM–
Description
Reserved
Reserved
Cable shield and signal common
Reserved
Reserved
Positive biased signal line
Reserved
Reserved
Negative biased signal line