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Product Data Document
420DS-1k
July 16, 2007 - Page 9
Bristol
®
ControlWave
®
PAC
Remote Automation Solutions
Website: www.EmersonProcess.com/Remote
ControlWave Redundancy
Redundant systems are offered for critical pro-
cesses and harsh applications that require maxi-
mum operational readiness and system availability.
ControlWave Redundant Systems are designed to
prevent a single point of failure from shutting down
the system. ControlWave offers two levels of redun-
dant operation in order to achieve the optimum level
of reliability required by the application. Many ap-
plications require the level of reliability provided by
the cost effective ControlWave Redundant Process
Control and Communication system. Other, even
more critical applications may require the higher
system availability provided by the ControlWave Re-
dundant I/O system. These designs deliver redun-
dant systems that provide high availability, reliability,
and safety.
ControlWave Redundant System
Dual CPUs, Dual Power Supply Sequencers
Automatic Failure Detection
Automatic Switchover to Hot Standby Controller
Switchover time typically < 500 ms
High Reliability
No Single Point of Failure
Communication Channel Switching
Alarm and Historical Data Backup
No programming required for redundancy data
transfer
Upgrade programs on the y
Convenient Packaging
Refer to product data document 420ds11a.pdf for
complete details.
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OpenBSI
Simply Creative
Emerson’s OpenBSI (Open Bristol System Interface)
is a set of network setup, communication diagnostic,
and data viewing utilities that provide access to both
Local I/O or Expansion I/O Redundancy
Process Control and Communications Redundancy