Ansi B11 - Siemens SINUMERIK 840D sl Function Manual

Regulations and Standards
1.3 Machine safety in the US
Underwriter Laboratories (UL) has defined a special Category for "Program-
mable Safety Controllers" for implementing this requirement (code NRGF). This
category handles control devices that contain software and are used in safety-
related functions.
The precise description of the Category and the list of devices that fulfill this
requirement are listed in the Internet:
http://www.ul.com –> certifications directory –> UL Category code/Guide infor-
mation –> search for category "NRGF"
TUV Rheinland of North America, Inc. is also an NRTL for these applications.
1.3.4

ANSI B11

ANSI B11 Standards are joint Standards, that were developed by associations
such as e.g. the Association for Manufacturing Technology (AMT and the Robotic
Industries Association (RIA).
The hazards of a machine are evaluated using a risk analysis/assessment. Risk
analysis is an important requirement acc. to NFPA79–2002, ANSI/RIA 15.06 1999,
ANSI B11.TR–3 and SEMI S10 (semiconductors). Using the documented results of
a risk analysis, suitable safety systems can be selected based on the safety class
obtained as a result of the particular application.
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
© Siemens AG, 2006. All rights reserved
03.06