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5
I
NSTALLATION
I
NSTRUCTIONS
WARNING
!
THE HAZARD MUST BE ACCESSIBLE ONLY THROUGH THE SENSING FIELD
Incorrect system installation could result in serious injury or death.
•
The installation of the SI-RF Safety Switch must prevent any individual from reaching around, under, over
or through the defined area and into the hazard without being detected.
•
See OSHA CFR 1910.217, ANSI B11.19, and/or ISO 14119, ISO 14120 and ISO 13857 for information on
determining safety distances and safe opening sizes for your guarding device. Mechanical barriers (for ex
-
ample, hard (fixed) guarding) or supplemental safeguarding might be required to comply with these re
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quirements.
3.2. Pass-through hazards and Perimeter Guarding
A pass-through hazard is associated with applications where personnel may pass through a safeguard (which issues a stop command to remove
the hazard), and then continues into the guarded area, such as in perimeter guarding. Subsequently, their presence is no longer detected, and
the related danger becomes the unexpected start or restart of the machine while personnel are within the guarded area.
Eliminate or reduce pass-through hazards whenever possible—see ANSI B11.19 and ANSI B11.20 or ISO 11161. One method to mitigate the
risk is to ensure that once tripped, either the safeguarding device, the safety related part of the control system, or the guarded machine's
MSCs/MPCEs will latch in an OFF condition. The latch must require a deliberate manual action to reset that is separate from the normal means
of machine cycle initiation.
This method relies upon the location of the reset switch as well as safe work practices and procedures to prevent an unexpected start or restart
of the guarded machine. All reset switches must be:
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Outside the guarded area
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Located to allow the switch operator a full, unobstructed view of the entire guarded area while the reset is performed
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Out of reach from within the guarded area
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Protected against unauthorized or inadvertent operation (such as through the use of rings or guards)
If any areas within the guarded area are not visible from the reset switch, additional safeguarding must be provided.
WARNING
!
PERIMETER GUARDING APPLICATIONS
Failure to observe this warning could result in serious injury or death.
•
Use lockout/tagout procedures per ANSI Z244.1, or use additional safeguarding as described by ANSI
B11.19 safety requirements or other applicable standards if a passthrough hazard cannot be eliminated or
reduced to an acceptable level of risk.
3.3. Mechanical Installation
IMPORTANT
:
Install a safety switch in a manner which discourages tampering or defeat. Mount switches to prevent bypassing of the switching
function at the terminal chamber or Quick Disconnect (QD). A switch and its actuator must never be used as a mechanical stop. Overtravel may
cause damage to switch.
All mounting hardware is supplied by the user. Fasteners must be of sufficient strength to guard against breakage. Use of permanent fasteners
or locking hardware is recommended to prevent the loosening or displacement of the actuator and the switch body. The mounting holes (4.5 mm)
in the switch and actuator body accept M4 (#6) hardware.
Mount the sensor and actuator such that the position cannot be changed after installation/adjustment. Mount the switch securely on a solid,
stationary surface. Prevent the loosening of mounting hardware by using lock washers, thread-locking compounds, etc. Only use slots for initial
positioning. Pins, dowels, and splines can be used to prevent movement of the switch and the actuator.
Install the SI-RF Safety Switch to prevent false or unintended actuation and intentional defeat.
Locate the sensor and actuator to allow access for functional checks, maintenance, and service or replacement. The installation should provide
suitable clearances, be readily accessible, and allow access to the actuator and sensor.
