Rockwell Automation Allen-Bradley 1756-ENBT User Manual

Rockwell Automation Publication 1756-UM004D-EN-P - August 2022 37
Chapter 3 Connect Redundant EtherNet/IP Adapters
Redundant Architecture
Network Considerations
In a star topology with a single switch, if a link is broken between the switch
and the primary redundant adapter, a switchover occurs. With multiple
switches, for example as shown in Figure 4
, if a link is broken between two
switches, a switchover does not occur because the link to the redundant
adapter is still in place.
Figure 4 - Invalid Topology: Network Break Does not Cause Switchover
R
R
R
Primary
Secondary

Rockwell Automation Allen-Bradley 1756-ENBT Specifications

General

Product Type	Ethernet/IP Communication Module
Series	ControlLogix
Model Number	1756-ENBT
Communication Protocol	Ethernet/IP
Network Ports	1
Port Type	RJ45
Data Rate	10/100 Mbps
Module Location	Any slot in the ControlLogix chassis
Power Supply	Backplane
Operating Temperature	0 to 60 °C
Storage Temperature	-40 to 85 °C (-40 to 185 °F)
Relative Humidity	5 to 95% (non-condensing)
Compatible Controllers	ControlLogix
Certifications	CE, UL, cUL