Ul safety standards for linear stage installations – Rockwell Automation MPMA Integrated Multi-Axis Linear Stages User Manual
Page 26
26
Rockwell Automation Publication MPMA-UM001B-EN-P - November 2010
Chapter 3 Planning a Multi-axis Stage Installation
UL Safety Standards for Linear Stage Installations
All linear stage installations should follow Underwriters Laboratories standard
UL 1740 - Standard for Safety for Robots and Robotic Equipment.
UL 1740 covers robots and robotic equipment rated at 600V or less and intended
for installation in accordance with the National Electrical Code, ANSI/NFPA
70. Because end user installation of a robot and robotic equipment may vary for
each user application, guidelines for end-product installation may be evaluated to
the applicable sections of ANSI/RIA R15.06, Standard for Industrial Robots and
Robot Systems-Safety Requirements. Portions of the requirements in this
standard have been excerpted from the Robotic Industries Association's (RIA)
Standard for Industrial Robots and Robot Systems – Safety Requirements,
ANSI/RIA R15.06.
ANSI/RIA R15.06 specifically requires two safety features be in the design.
· A Power Enable light must be installed that meets all of these conditions:
– Must be amber or yellow in color.
– Must not have a screw type base or contain a filament.
– Must be visible from all approaches to the work cell.
– Must illuminate to indicate that drive power is available and motion is
possible.
For example, an Allen-Bradley 855T Control Tower Stack Light may be
used with socket mount status indicators. Incandescent bulbs are not
permitted.
· Provide a means of emergency movement without drive power available.
This should include a provision for a brake release on a ball screw linear
stage.
For example, refer to the
Emergency Brake Release for Ball Screw Linear
.
Unique features or functions associated with the robotic application, not
specifically addressed in UL 1740, shall also be evaluated to other applicable
standards and requirements. These may include, but are not limited to the
following:
· UL 3101-1, Electrical Equipment for Laboratory Use; Part 1: General
Requirements
· UL 544, Medical and Dental Equipment
· UL 79, Power Operated Pumps for Petroleum Product Dispensing
Systems
· ANSI/NFPA 79, Electrical Standard for Industrial Machinery