ControlLogix System

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Controllers

GuardLogix Controllers



A GuardLogix controller is a ControlLogix processor that also provides safety control. The GuardLogix system is a dual processor solution — you must use a 1756-L6xS primary controller and a 1756-LSP safety partner to Achieve SIL 3 and Cat. 4/PLe. A major benefit of this system is that it’s still a single project, safety and standard together. The safety partner controller is a part of the system, is automatically configured, and requires no user setup.

During development, safety and standard have the same rules, multiple programmers, online editing, and forcing are all allowed. Once the project is tested and ready for final validation, you set the Safety Task to a SIL 3 integrity level, which is then enforced by the GuardLogix controller. When safety memory is locked and protected, the safety logic can't be modified and all safety functions operate with SIL 3 integrity. On the standard side of the GuardLogix controller, all functions operate like a regular Logix controller. Thus online editing, forcing, and other activities are all allowed.

With this level of integration, safety memory can be read by standard logic and external devices, like HMIs or other controllers, eliminating the need to condition safety memory for use elsewhere. The result is easy system-wide integration and the ability to display safety status on displays or marquees. Use Guard I/O modules for field device connectivity on Ethernet or DeviceNet networks, and for safety interlocking between GuardLogix controllers use Ethernet or ControlNet networks. Multiple GuardLogix controllers can share safety data for zone to zone interlocking, or a single GuardLogix controller can use remote distributed safety I/O between different cells/areas.

For additional information see Safety Programmable Controllers, GuardLogix Integrated Safety System.

Features

In addition to the standard features of a ControlLogix controller, the GuardLogix controller has these safety-related features.

Feature	1756-L61S, 1756-L62S, 1756-L63S, 1756-LSP
Safety communication options	Standard and safety • EtherNet/IP • ControlNet • DeviceNet
Network connections, per network module	• 100 ControlNet (1756-CN2/A) • 40 ControlNet (1756-CNB)	• 256 EtherNet/IP; 128 TCP (1756-EN2x) • 128 EtherNet/IP; 64 TCP (1756-ENBT)
Controller redundancy	Not supported
Programming languages	Relay ladder

GuardLogix Controllers

Specifications [PDF]

Cat. No.	Description	User Memory
		Standard Tasks and Components	Safety Task and Components
1756-L61S	GuardLogix safety controller	2 MB	1 MB
1756-L62S		4 MB	1 MB
1756-L63S		8 MB	3.75 MB
1756-LSP	GuardLogix safety partner (one is required for each GuardLogix controller)	—	—