The tiway i network ports – Siemens SIMATIC TIWAY 1 User Manual
Page 77
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THE TIWAY I NETWORK PORTS
UNILINK HOST ADAPTER
4–3
USER MANUAL
The TIWAY I Local Line interface has the advantage of being more economical
than the modem interface since the media is shielded twisted pair cable, such as
Belden
9860 or Belden 9271. Figure 4–2 shows the TIWAY I bus structure with
the network trunkline cable, which can generally extend up to 25,000 feet with
droplines up to 100 feet in length. Figure 4–3 is a chart showing the maximum
cable distances compared to the number of stations on the TIWAY I network.
NOTE
PM550 CIM users should refer to Appendix C for
different media length factors.
Host
Computer
UNILINK
TIWAY I
UniLink Host Adapter ( MHU)
RS–232–C/RS–423–A
Host Interface Cable
Figure 4–2
TIWAY I Bus Structure
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