Redundant I/O System; Overview - Siemens SIMATIC TI505 User Manual

Redundant I/O System

Overview

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Redundant I/O provides for an enhanced Hot Backup Unit (HBU)
configuration that extends the redundant hardware capabilities. The
Redundant I/O system shown in Figure 1-1 consists of the following
elements.
Two SIMATIC TI560 /TI565 controllers in an HBU configuration
One to eight channels of Series 500 and/or Series 505 remote I/O
Dual remote base controllers (RBCs)
Dual cables
Dual base power supplies
The Redundant I/O system uses unchanged TI560/TI565 controller
hardware and provides the same major functions as the standard system. It
supports memory configuration, I/O configuration, Series 500 operational
modes, I/O cycles, Relay Ladder Logic execution, SF communication, and
operator interfaces.
TI560/TI565
R
Channel 1
C
C Channel 2
To other taps
Series
500
Base
* Power Supply
Figure 1-1 Redundant I/O System Diagram
HBU
TI560/TI565
R
Channel 1
C
C Channel 2
Dual
Tap
and
Splitter
Trunk A Trunk B
Tap Tap
R R
P P B B P
and/or
* * *
S S C C S
SIMATIC TI505 Redundant I/O System User Manual
Optional
To other taps
R R
Series
P B B
505
*
S C C
Base
I002741