Siemens SIMATIC TIWAY 1 User Manual page 77

THE TIWAY I NETWORK PORTS
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.
PM550 CIM users should refer to Appendix C for
different media length factors.
Host
Computer
UniLink Host Adapter ( MHU)
Figure 4–2 TIWAY I Bus Structure
NOTE
RS–232–C/RS–423–A
Host Interface Cable
UNILINK
4–3
TIWAY I
UNILINK HOST ADAPTER
USER MANUAL