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Enabling Switch with an Integrated Safety Controller and a POINT Guard I/O Safety Module Safety Function Application Technique
Introduction
This safety function application technique explains how to wire, configure, and program a Compact GuardLogix® controller and POINT Guard
I/O™ module to monitor an enabling switch. The operator squeezes the enabling switch to the middle position to bypass the primary, safety-
door interlock. This action allows the Compact GuardLogix controller to energize the final control device, in this case, a redundant pair of
100S contactors. The actual safety function that uses an enabling switch is beyond the scope of this document. The safety function may
require speed monitoring, direction monitoring, force monitoring, or additional monitoring to reduce hazard to a tolerable level while using
the enabling switch.
This example is applicable to any GuardLogix controller. This example uses a 440J interlock switch with an integrated jog button, but is
applicable to solutions that use enabling switch technology in combination with a manual button.
The Safety Integrity Software Tool for the Evaluation of Machine Applications (SISTEMA) calculations that are shown later in this document
would have to be recalculated using the actual products.
Use Sample Project Files
Sample project files (AutoCAD, EPLAN, ACD, SISTEMA, and Verification and Validation checklist) are attached to this document to help you
implement this safety function.
To access these files, follow these steps.
1.
If you are viewing the PDF file in a browser and do not see the Attachments link
Acrobat Reader application.
2.
Click the Attachments link
3. Right-click and save the desired file.
4. Open the file in the appropriate application.
4
.
Rockwell Automation Publication SAFETY-AT125C-EN-P - February 2022
, download the PDF file and open it in the Adobe
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