78 Rockwell Automation Publication 1769-UM011H-EN-P - April 2012
Chapter 5 Manage Controller Communication
Calculate Total Connections
You can calculate the total number of local and remote connections the controller
uses.
The number of remote connections a communication module supports
determines how many connections the controller can access through that
module.
Table 15 - Local Connections Calculation
Local Connection Type Device Quantity Connections per
Device
Total
Connections
Local I/O module (always a direct connection) 1
Built-in ControlNet communication port (1769-L32C and 1769-L35CR controllers only) 0
Built-in EtherNet/IP communication port (1769-L32E and 1769-L35E controllers only) 0
1769-SDN DeviceNet scanner module 2
Total
Table 16 - Remote Connections Calculation
Remote Connection Type Device Quantity Connections per
Device
Total Connections
Remote ControlNet communication module
• I/O configured as direct connection (none)
• I/O configured as rack-optimized connection
0 or
1
Remote I/O module over ControlNet (direct connection) 1
Remote EtherNet/IP communication module
• I/O configured as direct connection (none)
• I/O configured as rack-optimized connection
0 or
1
Remote I/O module over a EtherNet/IP network (direct connection) 1
Remote device over a DeviceNet network (accounted for in rack-optimized connection for local 1769-
SDN module)
0
Other remote communication adapter (POINT and FLEX adapters, for example) 1
Produced tag
Each consumer
1
1
Consumed tag 1
Message (depending on type) 1
Block-transfer message 1
Total
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