- Two megabytes of user memory support standard ControlLogix 5570 projects
- The controller supports up to thirty-two tasks and 128,000 total I/O points
- The built-in USB port is reserved for temporary local programming and maintenance
1756-L71 is an Allen-Bradley ControlLogix 5570 chassis controller with 2 MB of user memory and 0.98 MB of I/O memory.
It executes continuous, periodic, and event tasks while relying on separate chassis communication modules for plant networks; the front USB port is for temporary programming, configuration, firmware updates, and online edits.
Before installation or replacement, verify the hardware Series, firmware, Logix Designer project, chassis power, communication-module paths, I/O ownership, energy-storage module, SD image, and controlled startup procedure.
Availability, condition, price, and shipping time for 1756-L71 are confirmed during quotation.
Allen-Bradley 1756-L71 2 MB ControlLogix Controller Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- 1756-L71 provides two megabytes of user memory and 0.98 megabyte of I/O memory
- The controller supports a maximum of thirty-two continuous, periodic, or event tasks
- Beginning with Logix Designer version 24, each task can contain up to one thousand programs
- The documented maximum is 128,000 digital I/O points and 4,000 analog I/O points
- A maximum of five hundred controller connections is supported
- EtherNet/IP, ControlNet, DeviceNet, and other plant networks require appropriate chassis communication modules
- The USB 2.0 port is for temporary programming, configuration, firmware update, and online edits
- A 1784-SD1 one-gigabyte secure digital card ships with the controller for optional nonvolatile storage
- The installed capacitor energy-storage module must be identified before controller exchange
- Chassis-based machine sequencing and distributed-I/O coordination
- Process-unit control using modular ControlLogix communication and I/O hardware
- Integrated motion and networked automation projects within documented 5570 capacity