Siemens SIMATIC TI505 - Redundant Media Transmission; Alternate Channel Port; Redundant Media Circuit

TIWAY I Network Communication
3-7
S5 UniLink Adapter Installation and Operation
3.3 Redundant Media Transmission
Most TIWAY I conformant devices support a redundant media scheme
which provides active access to a device over one of two independent media
channels.
Port 2 on both Local Line and RS-232 models of the S5 UniLink Adapter
provides support for redundant media transmission. If access to a device
fails on one channel, communications can be automatically or manually
switched to the alternate channel. This type of a circuit is illustrated in
Figure 3-5.
I003649
S5
Adapter
NIM
5TI
NIM
TI545
NIM
TI545
NIM
TI565
CP525
135U
CP525
115U
S5
Adapter
Host
Secondary Bus
(Alternate Trunk)
UniLink Host Adapter
TIWAY I
(Secondary
adapters)
Port 2
Figure 3-5 Redundant Media Circuit
NOTE: Redundant media is provided to improve a network’s mission
reliability. However, the Adapter cannot use the dual media ports to access
two independent networks.
Alternate Channel
Port