Siemens SIMATIC TI505 Installation And Operation

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

Siemens SIMATIC TI505 Specifications

General

Brand	Siemens
Model	SIMATIC TI505
Category	Control Unit
Language	English