Specifications

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1768-SG001A-EN-P -- March 2006
CompactLogix Selection Guide
The 1768 CompactLogix controller combines both a 1768 backplane and a 1769 backplane.
This provides the advantages of the 1768 architecture while retaining the advantages of
1769 I/O support.
In the 1768 backplane:
y 1768 power supply is the leftmost module
y 1768 controller is the rightmost module
y Two additional 1768 modules can be placed between the power supply and controller:
- 1768-ENBT for EtherNet/IP communication (maximum of two)
- 1768-M04SE for SERCOS motion control (maximum of one)
y As many as eight local 1769 I/O modules (including a 1769-SDN) can be installed to the
right of the 1768 controller
The controller supports a maximum of 16 local 1769 I/O modules. As many as eight of the
local modules can be attached to the 1768 controller. Install the remaining modules in one
or two additional I/O banks. The additional banks are powered by standard 1769 power
supplies (that is, 1769-PA4) and connected to the main rack using standard 1769 extension
cables (that is, 1769-CRLx).
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As you layout a system configuration, determine the network configuration and the
placement of components in each location. Decide at this time whether each location will
have its own controller.
Use the 1768 CompactLogix system to distribute control among different locations. You
can remotely control I/O and field devices from a central controller over an EtherNet/IP
network.
For example, this system layout defines Location A and Location B, which each require a
unique 1768 CompactLogix controller. Location A and Location B each have their own local
I/O modules. Location A also has some distributed DeviceNet I/O devices, so that location
also needs a 1769-SDN DeviceNet scanner. Location B has SERCOS drives, so that
location needs a 1768-M04SE adapter. A supervisory EtherNet/IP network interlocks
Location A and Location B.