Rockwell Automation 1769-PB4 Compact I/O Expansion Power Supplies - Manuel (Page 10)

10 Compact I/O Expansion Power Supplies
Publication 1769-IN028B-EN-P - October 2008
Follow these steps to assemble the Compact I/O system.
1. Disconnect your line power.
The power supply does not support removal or insertion of modules under power.
2. Check that the bus lever of the power supply to be installed is in the unlocked (fully
right) position.
3. Use the upper and lower tongue-and-groove slots to secure the power supply to an
I/O module.
4. Move the power supply back along the tongue-and-groove slots until the bus
connectors line up with each other.
5. Push the bus lever back slightly to clear the positioning tab.
Use your fingers or a small screwdriver.
6. To allow communication between the controller and the I/O, move the bus lever of
the power supply and its adjacent I/O modules fully to the left until it clicks.
Make sure it is locked firmly in place.
7. Attach an end cap terminator to the last I/O module in the system by using the
tongue-and-groove slots as before.
8. Lock the end cap bus terminator.
WARNING
If you connect or disconnect wiring while the field-side power is on, an electrical arc can
occur. This could cause an explosion in hazardous location installations. Be sure that
power is removed or the area is nonhazardous before proceeding.
ATTENTION
When attaching expansion I/O power supplies, it is very important that the bus
connectors are securely locked together to ensure proper electrical connection.
IMPORTANT
A 1769-ECR or 1769-ECL right or left end cap (respectively) must be used to terminate the
end of the serial communication bus.