Introduction - Rockwell Automation Allen-Bradley Compact GuardLogix 5370 Controller Application Technique

Door Locking and Monitoring with a 442G Access Box and an Integrated Safety Controller Safety Function
Separating safeguards monitor a movable, physical barrier that guards access to a hazard. Publications that offer guidance
for calculating compliant access times for safety systems that use separating safeguards, such as gates with limit switches
or interlocks (including SensaGuard™ switches), include the following:
EN ISO 14119:2013 (Safety of Machinery – Interlocking devices associated with guards - Principles for design
and selection)
EN ISO 13855:2010 (Safety of Machinery – Positioning of safeguards with respect to the approach speeds of
parts of the human body)
EN ISO 13857:2008 (Safety of Machinery – Safety distances to prevent hazardous zones being reached by upper
and lower limbs)
ANSI B11:19 2010 (Machines – Performance Criteria for Safeguarding)
In addition, consult relevant national or local safety standards to assure compliance.

Introduction

This safety function application technique explains how to wire, configure, and program a GuardLogix® controller and
POINT Guard I/O™ module to lock and monitor a 442G Multifunctional Access Box (MAB) mounted on a power-to-
release door. If the door is opened or unlocked, or a fault is detected in the safety function, the GuardLogix controller
de-energizes the final control device, which in this safety function is a redundant pair of 100S contactors.
This example uses a 1756-L73S GuardLogix controller, but is applicable to any GuardLogix controller.
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 by using the actual products.
Access Components of the Safety Function
The component files (AutoCAD, EPLAN, ACD, SISTEMA, and Verification and Validation checklist) that are
attached to this document help you implement this safety function. To access these components, click the Attachments
link and right-click and save the component that you want to use. If the PDF file opens in a browser and you don't see
the Attachments link , download the PDF file and then reopen the file with the Adobe Acrobat Reader application.
4 Rockwell Automation Publication SAFETY-AT129B-EN-P - November 2018