Rockwell Automation Publication 1769-UM021G-EN-P - October 2015 53
Install the CompactLogix 5370 L2 Controller Chapter 2
The following graphic shows an external 24V DC power source that is connected
to a CompactLogix 5370 L2 controller.
Connect to the Controller via
a USB Cable
The controller has a USB port that uses a Type B receptacle. The port is USB
2.0-compatible and operates at 12 Mbps.
Use a USB cable to connect your computer to the USB port. With this
connection, you can upgrade firmware and download programs to the controller
directly from your computer.
Plug the USB cable into the CompactLogix 5370 L2 controller.
When you remove power from the CompactLogix 5370 L2 controller to cycle
power, the OK status indicator of the controller remains lit briefly as the
controller passes through its shutdown sequence.
Do not reapply power from the external power supply to the embedded power
supply of the CompactLogix 5370 L2 controller until after the OK status
indicator of the controller is off.
ATTENTION: The USB port is intended only for temporary local
programming purposes and not intended for permanent connection.
The USB cable is not to exceed 3.0 m (9.84 ft) and must not contain hubs.
WARNING: Do not use the USB port in hazardous locations.
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