1756-L71 1756-L71/B 1756L71 ControlLogix 2 MB Controller module

The A-B 1756-L71 ControlLogix controller belongs to Series A of the programmable automation controllers. Manufactured by A-B/Rockwell Automation, this controller comes with 2 MB of user storage memory and 0.98 MB of I/O memory. It features an onboard 4-character alphanumeric display to enable easy monitoring of the run-time information as well as the controller diagnostics. The 1756-L71 features an open enclosure type and one USB port with full speed.The 1756-L71 controller supports controller redundancy if it is paired up with a similar controller in the same ControlNet network.

The 1756-L71 controller is installed in ControlLogix chassis such as the 1756-A10K, 1756-A4K, 1756-A4, 1756-A7K, 1756-A7, 1756-A17, 1756-A10, 1756-A13, 1756-A17K, and the 1756-A13K chassis. The A-B 1756-L71 ControlLogix controller comes with a non-compulsory non-volatile memory, an SD card of 1 GB called the 1784-SD1, and this can be upgraded to 2 GB using the 1784-SD2 SD card. It is essential that the SD card remain installed in the 1756-L71 controller because that is where the diagnostic data is saved, and this is the information that Rockwell Automation uses when troubleshooting an issue with the controller. It is best to use Rockwell Automation SD cards since there are many other SD cards which have not been tested for compatibility with the controller. In fact, the use of other SD cards may result in data corruption. The A-B 1756-L71 controller ships with 3 different capacitor modules for energy storage, 2 are removable and the non-removable 1756-ESMNRM/1756-ESMNRMK module is used to secure the controller through the prevention of USB connections.

1756-L71 image is for reference only product style, specific data of manufacture and product version, please refer to the actual product delivery!

ControlLogix 5580 and ControlLogix 5570 controllers support controller redundancy. In a redundant controller system, you need these components:
• Two 1756 chassis, each with the same of the following:
- Number of slots - Modules in the same slots
- Redundancy firmware revisions in each module
- Approved module firmware revisions for use within ControlLogix Redundancy systems.
• One 1756-RM2, 1756-RM2K, or 1756-RM2XT module per chassis that supports the following:
- One or two ControlLogix controllers of the same family.ControlLogix 5580 controllers support redundancy with Studio 5000 Logix Designer application, version 33.00.02 or later.
- For ControlLogix 5580 controllers, as many as seven EtherNet/IP communication modules.
- For ControlLogix 5570 controllers, as many as seven ControlNet or EtherNet/IP communication modules in any combination.
• One or two 1756-RMCx cables

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