1492-C005005XF Allen-Bradley

• Touch a grounded object to discharge potential static.

• Wear an approved grounding wriststrap.

• Do not touch connectors or pins on component boards.

• Do not touch circuit components inside the equipment.

• Use a static-safe workstation, if available.

• Store the equipment in appropriate static-safe packaging when not in use.

Description:

• Both the 1768-PA3 and the 1768-PB3 power supplies require that a 1768 

CompactLogix controller be installed in the same bank as the power supply 

before the system is powered.

The power supply sends 24V dc to the controller located either immediately to the 

right of the power supply or immediately to the right of the communication and 

motion modules.

Power

Supply

Controller

Power supply provides 24V dc power to 

controller through the backplane.

1768 CompactLogix System

Controller provides 5V dc 

to communication and 

motion modules.

Controller provides 

5V/24V dc to 1769 I/O 

modules.

Communication or 

Motion Module

Communication or 

Motion Module

1769 I/O Module

1769 I/O Module

1768 CompactLogix Power Supplies 7

Publication 1768-IN001B-EN-P - July 2006

The controller converts the 24V dc to 5V dc and distributes 5V dc and 24V dc 

power as required by modules on the backplane. The following list describes 

controller power distribution considerations:

• 5V/24V power goes to 1769 I/O modules on the right side of the controller.

• 5V power goes to 1768 communication or motion modules on the left side 

of the controller.

• System power-up and power-down may take longer than expected.

• Full power-up should occur within a few seconds of turning on the power 

supply. Power-down, however, takes significantly longer. When the power 

supply is turned off, the CompactLogix controller uses some power to write 

its program to internal memory. During this program write, there is activity 

on the controller’s status indicators.

Payment: Bank of Chicago, Bank of Singapore

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Service: Professional Sales provides 24 hours /7 days online service

E-mail: alex@fenoux.com

Tel.: +86 13338369201

Skype: +86  13338369201

WhatsApp: +86  13338369201

E-mail: alex@fenoux.com

Tel.: +86 13338369201

Skype: +86  13338369201

WhatsApp: +86  13338369201