Catalogs > Automation Systems Catalog > Programmable Controllers > ControlLogix System > Controllers
Controllers
| Introduction | Environmentals and Certifications | Standard ControlLogix Controllers | ControlLogix-XT Controllers | GuardLogix Controllers | Accessories—Controllers |
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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 its 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 |
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| 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) | — | — |
