User guide

14 Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Chapter 1 System Overview
Selecting System Hardware
The Compact GuardLogix system supports SIL 3 and PLe safety applications.
Controller
1768-L43S and 1768-L45S controllers feature one built-in serial port. A
keyswitch on the front panel lets you change controller modes: RUN, PROGram
and REMote. The 1768 Compact GuardLogix controllers combine a 1768
backplane with a 1769 backplane. This combination includes all the advantages
of the 1768 architecture for safety applications while retaining the 1769 I/O
support for standard applications.
In addition, Compact GuardLogix controllers support 1768-M04SE SERCOS
modules for motion control in standard (non-safety) applications. For
information on developing motion applications, refer to the SERCOS and
Analog Motion Configuration and Startup Manual, publication
MOTION-UM001
.
Selecting Safety I/O Modules
Safety input and output devices can be connected to CIP Safety I/O on
EtherNet/IP networks, allowing output devices to be controlled by a Compact
GuardLogix controller system via EtherNet/IP communication.
For the most up-to-date information on available CIP Safety I/O catalog
numbers, certified series, and firmware revisions, see
http://www.ab.com/certification/safety
.
Selecting Communication
Networks
The Compact GuardLogix controller supports communication that lets it do the
following:
• Distribute and control Safety I/O on EtherNet/IP networks.
• Produce and consume safety tag data between 1756 and 1768 GuardLogix
controllers across EtherNet/IP or ControlNet networks.
• Distribute and control standard I/O on EtherNet, ControlNet, or
DeviceNet networks.
Controller Available 1768
Slots
Number of 1768
Communication
Modules
Maximum Local 1769 I/O Modules
Supported
Number of
Connections
Supported
Safety Task
Memory
Standard
Memory
1768-L43S 2 2 16 Modules in 3 Banks 250 0.5 MB 2 MB
1768-L45S 4 2 30 Modules in 3 Banks 1 MB 3 MB