1126800 SmartPAC 2 with WPC Integration
page 432 Appendix A Excerpts from OSHA Regulations and ANSI Standards
Extracts from ANSI B11.1-2001 8.5.3
Standard Requirements Explanatory Information
8.5.3.4 When the sensing field has been
interrupted, use of the normal press cycle
(stroke)-actuating means shall be required after
clearing the sensing field to resume press
operation.
8.5.3.6 Muting of the device shall be permitted
only during the non-hazardous portion of the
press cycle (stroke).
E8.5.3.6 Muting is typically accomplished by
interface circuits or auxiliary controls.
The die closing portion of the cycle (stroke) is
always considered hazardous. In some cases,
feeding and transfer automation or die features
can cause additional hazardous conditions even
during the opening portion of the cycle (up-
stroke).
See also, B11.19 for additional information.
8.5.3.7 Muting of the device shall be
accomplished in a manner that conforms to the
requirements of 6.8 (and 8.7)
E8.5.3.7 Muting is typically accomplished by
interface circuits or auxiliary controls. The
muting element should incorporate a similar
level of control reliability as the presence-
sensing device itself. A simple cam-operated
limit switch wired in parallel with the device's
output is inadequate as its failure can remain
undetected
8.5.3.8 The device shall have an identifiable
minimum object sensitivity so that an
obstruction of an equal or greater size will be
detected anywhere within the sensing field
regardless of the plane of intrusion.
E8.5.3.8 The device should have a minimum
object sensitivity stated by the device
manufacturer. For example, electro-optical
devices may detect a 32 mm (1-1/4 inch)
diameter opaque object anywhere in its sensing
field but allow 25 mm (1 inch) obstructions to
pass undetected at certain points in the field.
8.5.3.9 The device shall have a maximum
response time which shall not be affected by
object sensitivity adjustments or environmental
changes.
E8.5.3.9 The device manufacturer should state
the maximum total response time, including
output devices, of the presence-sensing device.
8.5.3.10 Devices which require adjustments to
accommodate variations in ambient or operating
conditions or which incorporate fixed blanking
or floating blanking features shall be designed
so that the adjustments or features are capable
of being supervised by the user.
E8.5.3.10 Typically, these adjustments or
controls are key-operated or located under
lockable covers.
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