WPC 2000 User Manual
1128500
Extracts from OSHA and ANSI
A-15
The device shall be installed such that it does
not create additional hazards.
Some installation hazards include, but are not
limited to:
pinch point hazards created by interference between
the device and moving members of the machine;
tripping hazards;
electrical shock hazards;
overhead or other "strike against" hazards;
thermal hazards.
Where such conditions can exist, additional
safeguarding may be required.
8.3.2.2 The presence-sensing device shall be
installed at a location so that the effective
sensing field prevents individuals from reaching
the hazard(s) during the hazardous portion of
the machine cycle.
E8.3.2.2 The safety distance calculation is
dependent upon the:
total response time of the device as stated by the
safeguarding supplier;
response time of the interface;
response time of the control system;
time it takes the machine to stop hazardous motion;
and
depth penetration factor of the device.
See Annex D for the formula(e) to calculate the
safety distance.
Radio frequency devices have sensing fields
that can vary due to:
antenna(e) design;
effects of adjacent machinery and equipment;
field sensitivity adjustments; and
environmental factors (such as humidity or
temperature).
Before the machine is used for production
purposes, the RF device should be checked to
ensure that the effective field protects
individuals at the safety distance.
8.3.2.3 The presence-sensing device shall
protect individuals from hazards by initiating an
immediate stop command to the machine
control system when the sensing field of the
device is interrupted during the hazardous
portion of the machine cycle. It shall require re-
initiation of the normal actuating means prior to
the start or continuation of motion of the
machine.
E8.3.2.3
When an individual can pass through the
sensing field of the presence-sensing device,
the device shall initiate an immediate stop
command to the machine control system and
shall require that the device or machine control
be manually reset before hazardous motion can
occur.
The operator should ensure that no individual is
in the safeguarded area before re-setting the
device or machine control and initiating
hazardous motion.
Extracts from ANSI B11.19-2003 8.3
Standards Requirements
Explanatory Information
Содержание wpc 2000
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