Rockwell Automation 1788-CN2FF ControlNet to Foundation Fieldbus H1 Linking Device Installation Instructions - Manual (Page 18)

18 ControlNet-to-Foundation Fieldbus H1 Linking Device
Publication 1788-IN051D-EN-P - February 2004
Device vs. Connection Clarifications
This section describes the functional relationship and differences between 1788-CN2FF
Connections and Foundation Fieldbus
ΤΜ Devices. A connection does not always equal a
device.
• A connection is considered any link (wire connection) to:
• CNAI, ControlNet ANALOG INPUT
• CNAO, ControlNet ANALOG OUTPUT
• CNDI, ControlNet DIGITAL INPUT
• CNDO, ControlNet DIGITAL OUTPUT
• A device is considered a specific Foundation Fieldbus device such as a
transmitter.
For each different network configuration, you must account for all connections and devices
toward the maximum recommendations.
ATTENTION
The maximum number of “connections” is 30 per CN2FF. The
recommended number of “devices” is 8 per H1 port on the
CN2FF. If you exceed the maximum number of connections or
the recommended number of devices, system performance could
be compromised.