1771-OA1 Allen-Bradley

1771-OA1  Allen-Bradley  Industrial control module spare parts

A 1756 GuardLogix® controller is a ControlLogix controller that also provides the ability to perform safety functions. You must use a primary 

safety controller and a safety partner to achieve up to SIL CL 3/PLe/Cat. 4. A major benefit of this system is that it is still one project, safety 

and standard together. The safety partner is a part of the system, is automatically configured, and requires no user setup.

With the introduction of the GuardLogix 5580 controller, users can achieve up to SIL 2/PLd (Category 3) with a single controller and the use of 

the safety task and safety I/O.

During development, safety and standard have the same rules. Multiple programmers, online editing, and forcing are allowed. Once the safety 

system is validated and the safety signature applied, safety memory is protected, the safety logic cannot be modified, and all safety 

functions operate with SIL integrity. If the safety partner is present, the safety integrity will be SIL 3. If no safety partner is present, the 

safety integrity will be SIL 2. 

On the standard side of the GuardLogix controller, all functions operate like a regular Logix controller. Online editing, forcing, and other 

activities are allowed.

With this level of integration, safety memory can be read by standard logic and external devices, like HMIs or other controllers, minimizing 

the need to condition safety memory for use elsewhere. The result is system-wide integration and the ability to display safety status on 

displays or marquees. For field device connectivity on EtherNet/IP or DeviceNet networks, use Guard I/O™ modules. For safety interlocking 

between GuardLogix controllers, use EtherNet/IP or ControlNet networks. Multiple GuardLogix controllers can share safety data for zone to 

zone interlocking, or one GuardLogix controller can use remote distributed safety I/O between different cells/areas.

1756 GuardLogix controllers are available with a conformal coating to add a layer of protection when exposed to harsh, corrosive 

environments

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