1126700
SmartPAC 2 User Manual
6-22
Run Mode
ANSI and OSHA Safety Distance Formulas
Occupational Safety and Health Administration (OSHA) regulations and American National
Standards Institute (ANSI) standards mandate that all machine safeguarding devices,
including Shadow light curtains, be located at the correct safety distance from the pinch point.
OSHA regulation 1910.217 governs the mounting of infrared light curtains to protect
mechanical power presses. Wintriss recommends, however, that you use the formula in ANSI
standard B11.1-2009 when calculating safety distance. The ANSI formula has been
developed specifically for guarding of mechanical power presses and includes more factors,
such as brake monitor setting, object sensitivity, and depth penetration factor, than the OSHA
formula. The B11.1-2009 formula represents a new consensus among manufacturers on the
proper installation of light curtains. ANSI and OSHA formulas are documented in the
following sections.
The ANSI Safety Distance Formula
Figure 6-21. View of Light Curtains and Press Showing Safety Distance
OBSERVE THE CORRECT SAFETY DISTANCE
• Calculate the safety distance carefully according to the instructions below, and mount your light
curtain heads at least the calculated distance from the hazardous area.
• Mount your light curtain heads at least 7.5 in. (191 mm) from the hazardous area, regardless of
the calculated safety distance.
• Be sure your value for Ts (i.e., stopping time) includes the response times of all devices that
react to stop the press. If your measurement for stopping time does not include the response
times of the press control, light curtain, and any other devices that react to stop the press, the
safety distance will be too short.
Failure to comply with these instructions will result in death or serious injury.
pinch point
Shadow transmitter
Distance between
light curtain and
pinch point
One of Shadow's
invisible light beams
Shadow
receiver
DANGER
!
Summary of Contents for SmartPAC2
Page 21: ...1126700 SmartPAC 2 User Manual xviii Table of Contents ...
Page 143: ...1126700 SmartPAC 2 User Manual 4 46 Initialization Mode ...
Page 197: ...1126700 SmartPAC 2 User Manual 5 54 Program Mode ...
Page 233: ...1126700 SmartPAC 2 User Manual 6 36 Run Mode ...
Page 245: ...1126700 SmartPAC 2 User Manual 7 12 Fault Messages ...
Page 271: ...1126700 SmartPAC 2 User Manual B 12 Updating SmartPAC 2 Firmware ...
Page 309: ...1126700 SmartPAC 2 User Manual E 6 Replacing SmartPAC 2 PC Board ...
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