1756-RM001B-EN-P, Using ControlLogix in SIL2 ... - Tuv-fs.com

1756-RM001B-EN-P, Using ControlLogix in SIL2 ... - Tuv-fs.com 1756-RM001B-EN-P, Using ControlLogix in SIL2 ... - Tuv-fs.com

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3-6 ControlLogix System HardwareNotes:Publication 1756-RM001B-EN-P - October 2003

Chapter 4ControlLogix ControllerThis chapter discusses the ControlLogix controller as used in aSIL2-certified system.Introduction to theControllerThe ControlLogix controller (catalog number 1756-L55M16) used in aSIL2-certified ControlLogix system is a solid-state control system with auser-programmable memory for storage of data to implement specificfunctions, such as:• I/O control• Logic• Timing• Counting• Report generation• Communications• Arithmetic• Data file manipulationThe controller consists of a central processor, I/O interface andmemory.The controller performs power-up and run-time functional tests. Thetests are used with user-supplied application programs to verifyproper controller operation.1 Publication 1756-RM001B-EN-P - October 2003

3-6 <strong>ControlLogix</strong> System HardwareNotes:Publication <strong>1756</strong>-<strong>RM001B</strong>-<strong>EN</strong>-P - October 2003

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