The PLC 1756-L72S is a 5570 GuardLogix Programmable Automation Controller (PAC). This controller features standard and safety controller capabilities. This controller is the primary controller, used with a safety partner with catalog number 1756-L7SP or 1756-L7SPK to achieve Safety Integrated Level (SIL) Category Level (CL) 3/Performance Level e (PLe) /Cat. 4. Rating. Using the 1756-L72S, standard and safety projects are integrated in a single file unlike dedicated safety controllers.
The 1756-L72S features high-capacity standard memory and a dedicated safety memory. These memory areas amount to 4 Megabytes user memory, 2 Megabytes Safety memory, I/O memory of 0.98 Megabytes and 1 Gigabyte non-volatile memory which is provided by the 1784-SD1 that ships with the controller. It enables the 1756-L72S to interface up to a maximum of 128,000 Input and Output (I/O) signals which may be composed of 128,000 Discrete I/O along and 4000 Analog I/O.
The 1756-L72S is an environment-friendly controller, as it is equipped with modern energy storage modules rather than traditional Lithium batteries to retain the Random Access Memory (RAM). These memory storage modules include 1756-ESMCAP which ships with the controller; 1756-ESMNSE which is a removable, no residual WallClockTime power backup or 1756-ESMNRM that is nonremovable and helps prevent USB connection and SD card use to help secure the controller.
