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1756-L55M23
Rockwell Disclaimer: The product is used surplus. PDF Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because PDF Supply is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, PDF Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. PDF Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. PDF Supply also makes no representations as to your right to install any such firmware on the product. PDF Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
PDF Supply is NOT an authorized distributor for this manufacturer and therefore the manufacturer’s warranty does not apply. Product comes with PDF Supply's 1-year, 2-year, or 3-year warranty.
Other Available Revisions for the 1756-L55M23 1756-L55M23//A
Common misspellings:
- l756-L55M23
- 1756-155M23
- 1756L55M23
The Allen Bradley/Rockwell Automation 1756-L55M23 controller is actually a compact processor module from the Logix5000 family of products which offers many control functionalities, safety features, communication capabilities, and improved I/O. The use of such a controller is completely modular so the users can modify it and adapt it towards its needs and requirements, while avoiding unnecessary costs for training and engineering. The 1756 ControlLogix controllers can be used for various I/O points and it fits any slot on the ControlLogix I/O chassis. In addition, the users have the possibility and option to install several controllers in the same chassis if the need arises. The 1756-L55M23 ControlLogix controller operates so that it can be used for different applications which include monitoring and controlling I/O throughout the whole ControlLogix backplane and also over links for networking. The controller has a backplane current of 1.23 Amps for 5 Volts DC input voltage and a backplane current of 14 mA for 24 Volts DC input voltage. Also, the controller features 128,000 maximum I/O and 4,000 input/2,000 output of maximum analog I/O. The program scan time of the 1756-L55M23 controller is at 0.08 milliseconds. The controller weighs only 0.35 kilograms or 0.78 pounds and it operates within a temperature range of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit). Also, the controller is resistant to 10 to 500 Hertz vibration and it can be used at a humidity level from 5 to 95%.
The 1756-L55M23 controller features 1.5 MB of nonvolatile memory for backup, 1.5MB of RAM memory, 1.5 kilobytes of data/logic memory, and 208 kilobytes of I/O memory. The resources of the 1756-L55M23 are distributed through a backplane CPU and a Logix CPU. The backplane CPU of the controller is used mostly for sending and receiving data which provides communication with the I/O, while the Logix CPU deals with application codes and messages that are being executed. The connection between the 1756-L55M23 controller and the workstation or another controller is achieved through the serial port and the controller is connected to the workstation with a standard serial cable. The 1756-L55M23 controller is also able to communicate with other devices that are used within a system. This communication can be accomplished through networks such as ControlNet, EtherNet/IP, DeviceNet, and similar networks.
