Allen Bradley 1756-L72 SER B Logix Processor Automation Controller

Product Specification

Allen-Bradley 1756-L72 SER B Logix Processor Automation Controller

  Allen-Bradley 1756-L72 is a ControlLogix Series Programmable Automation Controller (PAC). It has an available 4 MB user memory for data and logic and 0.98 MB I/O memory. The controller ships with a 1 GB SD card, the 1784-SD1, that you can use as optional nonvolatile memory storage. You can also upgrade it to 2 GB via the 1784-SD2 card if the storage is not enough for your use. It is recommended that the SD card is installed to the controller and to only use those that are sold by Rockwell Automation, as these cards have been fully tested to work with the controllers. Using other SD cards poses a risk of experiencing data loss or corruption. The SD cards are primarily used to store diagnostic data that is written automatically when a fault occurs. These data are used by Rockwell Automation for troubleshooting purposes. The 1756-L72 controller also comes with three capacitor energy storage modules. The 1756-ESMCAP/1756-ESMCAPK is a removable module available in every controller. Another removable module is the 1756-ESMNSE/1756-ESMNSEK that has no residual WallClockTime power backup. The only nonremovable module is the 1756-ESMNRM/1756-ESMNRMK that helps prevent USB connection and SD card use to help secure the controller.

You can use the 1756-L72 controller together with specific modules to create an Armor ControlLogix controller. It can support controller redundancy when paired with a similar controller and in the same ControlNet network. ControlLogix chassis that are compatible with this controller are 1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K, 1756-A17, and 1756-A17K. It also has 1 full-speed USB 2.0 port available and a 4-character alphanumeric display for you to view its current status. Several communication options are available with the 1756-L72 controller and these are Data Highway Plus, DeviceNet, Ethernet/IP, Remote I/O, SynchLink, ControlNet, and Third-party process and device networks. This controller has a continuous isolation voltage of 30 Volts and has been type tested for 60 seconds at 500 Volts AC. It has a current draw of 5 mA at 1.2 Volts DC and 800 mA at 5.1 Volts DC. Power dissipation of the 1756-L72 controller is 2.5 Watts and its thermal dissipation is 8.5 BTU/hour. Storage temperature of the controller ranges from -40 to 85 Degrees Celsius, while its operating temperature range is 0 to 60 Degrees Celsius. It has a vibration of 2 G at 10 to 500 Hertz, an operating shock of 30 G, and a non-operating shock of 50 G.

The Allen-Bradley 1756-L72 belongs to the most recent ControlLogix product category. This part number represents a ControlLogix controller with 4Mb user memory and pre-allocated I/O memory capacity of 0.98 MB.

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