Rockwell Automation 442L SafeZone Singlezone & Multizone Safety Laser Scanner - Manual (Page 16)

R
SafeZone™ Safety Laser Scanner User Manual
14 10000073050, July 2011
Original instructions
3.4.6 Restart
Figure 18: Schematic of operation with restart interlock
Restart interlock
The dangerous state of a machine Πor a vehicle is interrupted as soon as
there is an object in the protective safety field  and is not enabled again Ž,
even if there is no longer an object in the protective safety field. The
OSSDs are only enabled again when the operator operates the control
switch for restarting or resetting.
The restart interlock can be implemented in two different ways:
• With the internal restart interlock of the SafeZone safety laser
scanner:
The outputs on the SafeZone safety laser scanner are enabled after the
connected control switch is operated.
• With the restart interlock of the machine controller:
The SafeZone safety laser scanner has no effect on the restart.
Restart delay
On the SafeZone safety laser scanner, instead of a restart interlock you can
configure a restart delay of 2 to 60 seconds. This enables the machine or the
vehicle to start automatically when the protective safety field becomes
clear, and the pre-set time has elapsed. It is not possible to combine restart
interlock and restart delay.
The SafeZone safety laser scanner has a configurable
application diagnostic output (device symbol
SafeZone safety laser scanner system, context menu
Configuration draft, Edit..., file card Scanner name).
For the application diagnostic output you must
decide
• Whether it is deactivated.
• Whether an output signal is only active when the
front screen is contaminated.
• Whether an output signal is only active when an
error occurs.
• Whether an output signal is activated for both the
front screen contamination and on errors.
ATTENTION Place the control switch for restart or
reset outside the hazardous area in a
place where it can clearly be seen from
the hazardous area.
Place the control switch for restart or
reset outside the hazardous area such
that it cannot be operated by a person
in the hazardous area. Ensure that the
person who operates the control
switch has a full view of the hazardous
area.
Œ  Ž
ATTENTION It is important to configure the
SafeZone safety laser scanner with
restart interlock if a person cannot be
detected at every point in the hazard
area for the SafeZone safety laser
scanner.
Operators may be at risk if restart
interlock is not configured. Check, if
necessary, whether it is possible to
prevent personnel from approacing
the hazard point by design measures
(see Section 4.1.2 “Measures to protect
areas not covered by the SafeZone
safety laser scanner" on page 21).
IMPORTANT The SafeZone safety laser scanner
cannot differentiate between a
contaminated front screen and an
obstacle directly in front of it. To ensure
high availability, the SafeZone multizone
safety laser scanner has been designed
such that it reliably detects dark black
bodies such as wide black cord or shoe
leather from a distance of 5 cm in front
of the front screen. Black objects that
are closer to the front screen may not be
detected.
ATTENTION Secure the area close to the SafeZone
safety laser scanner if operated without
restart interlock.
Make the area near the device
inaccessible by means of physical
measures (hard guard or recessing) or,
in addition to the SafeZone safety laser
scanner, use a proximity switch with 5
cm acquisition range. Without this
additional protection you will
endanger persons who move from the
protective safety field into the area
near the device.