Honeywell CIU 888 Migration Manual

Part No.: 4417593_Rev09 Ensite Pro to CIU 888 Migration Manual
CIU 888 C - 1
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APPENDIX C REDUNDANCY
C.1 Sync Link and database synchronization
Redundancy between a pair of CIU 888s is realized by synchronizing
the databases of the CIU 888s. Real-time and continuous
synchronization ensures that all recently measured data is available to
both CIU 888s and is required to minimize switch-over time.
To achieve real-time and continuous synchronization, a dedicated
Ethernet connection between the pair of CIU 888s must be established,
called the Sync Link. The Sync Link connection is also used to
determine the actual role of each CIU 888 (active or passive). To
establish the Sync Link connection, the CIU 888s have to be connected
by means of a Cat. 5. Ethernet cable.
In a redundant CIU 888 system setup the following data stores are kept
synchronized:
 Real-time data
 Active gauge commands, including status
 Configuration data
 Operational data (manual overwrites and gauge commands)
 Clock
NOTE: A failure in the Sync Link connection will disable synchronization.
The Sync Link port is located at the back of the CIU 888 (see
FIGURE C-1).
FIGURE C-1 CIU 888: Sync Link port

Honeywell CIU 888 Specifications

General

Brand	Honeywell
Model	CIU 888
Category	Recording Equipment
Language	English