Siemens SIMATIC TIWAY 1 - Manual (Page 4)

THE UNILINK HOST ADAPTER
UNILINK HOST ADAPTER 1–3
USER MANUAL
Host
Computer
RS–232–C/RS–423A
Host Interface
(Command Processor)
TIWAY I
Interface
External
Input Point Output Point
TIWAY I
Network
Secondaries
UniLink
Host Adapter
Figure 1–3 UNILINK Host Adapter Block Diagram
Port
1
Port
2
Port
3
Port
4
AC
NEUT
AC
LINE
GND
1 2 3 4 5
I/O
Host Computer Port Power Connections
TIWAY I Ports External I/O Points
PPX:500–7111, Dual Local Line media ports shown here.
Figure 1–4 UNILINK Host Adapter Physical Features