Allen-Bradley 1756-L61S

24 Rockwell Automation Publication 1756-RM093J-EN-P - April 2018
Chapter 2 GuardLogix Controller System
Communication Bridges
Table 7 lists the communication interface modules available to facilitate
communication over EtherNet/IP™, DeviceNet, and ControlNet networks via
the CIP Safety protocol.
EtherNet/IP Network
Peer-to-peer safety communication between GuardLogix controllers is possible
via the EtherNet/IP network through the use of EtherNet/IP bridge modules.
An EtherNet/IP bridge module lets the GuardLogix controller control and
exchange safety data with CIP Safety I/O modules on an EtherNet/IP network.
Figure 4 - Peer-to-peer Communication via EtherNet/IP Bridge Modules and the EtherNet/IP
Network
Table 7 - Communication Interface Modules by System
GuardLogix System Communication Modules
1756 • 1756-ENBT, 1756-EN2T(R), 1756-EN2F, or 1756-EN3TR EtherNet/IP bridge
module
• 1734-AENT POINT I/O™ Ethernet Adapter
• 1756-DNB DeviceNet bridge module
• 1756-CN2 ControlNet bridge module
• 1756-CN2R Redundant ControlNet bridge module
1768 • 1768-ENBT
• 1734-AENT POINT I/O Ethernet Adapter
• 1768-CNB
• 1768-CNBR
IMPORTANT
Due to the design of the CIP Safety control system, CIP safety bridge
devices, like those listed in the table, are not required to be SIL 3-certified.
TIP
Peer-to-peer safety communication between two 1756 GuardLogix
controllers in the same chassis is also possible via the backplane.
1768-PB3 1768-L43S 1768-ENBT 1769-ECR 1756-L62S 1756-LSP 1756-DNB 1756-ENBT
Controller A
Controller B
Ethernet Switch
CIP Safety I/O Module
CIP Safety I/O Module
DeviceNet Network
EtherNet/IP
Network
EtherNet/IP
Network
CIP Safety I/O Module
CIP Safety I/O Module
1756-L62S 1756-LSP 1756-L62S 1756-LSP
Backplane