1756-L74 - Processor Unit - ALLEN BRADLEY
This ALLEN BRADLEY 1756-L74 CPU is part of the 1756 ControlLogix Controllers Series
Memory: 16MB, I/O : 0.98MB, 128000 digital I/O, 4000 analog I/O. 2.5W
This CPU ALLEN BRADLEY is at your disposal to replace your defective equipment and has a guarantee adapted to your needs.
CPU 100% tested.
The ControlLogix controller provides a scalable controller solution that is capable of addressing a large amount of I/O points. The ControlLogix controller can be placed into any slot of a ControlLogix I/O chassis and multiple controllers can be installed in the same chassis.
ControlLogix controllers can monitor and control I/O across the ControlLogix backplane, as well as over network links. To provide communication for a ControlLogix controller, install the appropriate communication interface module into the chassis.
Memory cards offer nonvolatile memory to permanently store a user program and tag data on a controller. The 1756-L7x ControlLogix controller comes with the 1784-SD1 Secure Digital (SD) card already installed in every controller. The 1756-L6x controllers support optional CompactFlash cards purchased separately. The memory cards are installed in a socket on the controller. Through the programming software, you can manually trigger the controller to save to, or load from, nonvolatile memory or configure the controller to load from nonvolatile memory on powerup.
A ControlLogix system uses connections to establish communication links between devices. The types of connections include the following:
• Controller-to-local I/O modules or local communication modules
• Controller-to-remote I/O or remote communication modules
• Controller-to-remote I/O (rack-optimized) modules
• Produced and consumed tags
• Access via the controller programming software
• Access via RSLinx® software for HMI or other applications
You indirectly determine the number of connections the controller uses by configuring the controller to communicate with other devices in the system. The limit of connections may ultimately reside in the communication module you use for the connection. If a message path routes through a communication module, the connection related to the message also counts towards the connection limit of that communication module.
The 1756-L6x and 1756-L6xS controllers support 250 connections; the 1756-L7x and 1756-L7xS controllers support 500. To calculate the total connections for a controller, consider the connections to local I/O modules and the connections to remote modules.
Allen-Bradley is the brand-name of a line of Factory Automation Equipment manufactured by Rockwell Automation. The company, with revenues of approximately US $6.4 billion in 2013, manufactures programmable logic controllers (PLC), human-machine interfaces, sensors, safety components and systems, software, drives and drive systems, contactors, motor control centers, and systems of such products.
Rockwell Automation also provides asset-management services including repair and consulting. Rockwell Automation's headquarters is in Milwaukee, Wisconsin.