Specifications

59
1768-SG001A-EN-P -- March 2006
CompactLogix Selection Guide
MMoodduullee
1768-PA3 power supply
1768-L43 controller
1769-ECR right-end cap
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1768 Backplane
leftmost
⎯⎯
⎯
⎯
rightmost
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right
right
right
right
right
right
right
right
right
⎯⎯
Totals mA mA
You only need an end cap if this is the last bank in the system.
Use the following charts to record module placement. These charts have positions for the
maximum number of modules in an I/O bank. The controller cannot necessarily support
modules in all positions. Follow these guidelines as you place 1768 modules:
y The 1768 power supply must be the leftmost module in the 1768 backplane.
y The controller must be the rightmost module in the 1768 backplane.
y As many as two additional 1768 modules can be between the controller and power
supply.
Follow these guidelines as you place 1769 modules to the right of the 1768 backplane:
y As many as eight 1769 modules can be attached to the right of the 1768 system.
y The 1769 I/O connected directly to the 1768 backplane does not need a 1769
power supply.
y Additional 1769 modules must be in additional I/O banks.
y Each additional I/O bank must have its own, standard 1769 power supply.
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