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Features
SLTSeries
Auto Blank (patented)
Important: Place Auto Blank keyswitch into OFF/
RESET position and remove any obstructions
while aligning light curtain.
Blank until light curtain is correctly aligned
(see Installation Procedure).
The keyed lock sw itch is desig n a ted to be
supervisory controlled. After installation, the safety
key should be removed and controlled only by the
safety supervisor or authorized plant personnel.
The term Auto Blank is an abbreviation which sands for
automatic programmable beam blanking. Auto Blanking
is controlled by a multi-position keyswitch and has three
distinct modes of operation:
1)
MUST BE RESET IF AUTO BLANK OBSTRUCTION
MOVES OR GUARD PENETRATED
The Auto Blank obstruction must remain in its
exact location permanently. Any movement in
the Auto Blank obstruction and/or additional
guard penetration will latch the light curtain in a
RED condition and must be reset via the
keyswitch.
NOTE: If no obstructions were programmed in,
the guard will still latch in a RED condition should
the guard be penetrated.
2 )
MUST BE RESET IF Aurn BLANK OBSTRUCTION
MOVES.
The Auto Blank obstruction must remain in its
exact location permanently . This works like
Mode 1 except guard penetrations will not latch
relays (automatic reset to GREEN condition).
2
MODE
WITH FLOATING BLANK
3 )
This mode works like Mode 2 with the addition
of a Floating Blank which is set to allow a one
beam float (see Floating Blank).
NOTE: If no obstructions were programmed in,
the guard will still allow a one beam float.
Do not place the moving obstruction in the light
curtain while programming Auto Blank.
The Penetration Depth Factor D(pf) must be set to
account for the one beam float plus Auto Blank (see
ANSI Standard B11.19-2003 D(pf) table, Appendix A).
NOTE: On all modes of auto blanking,
obstruction(s) need not be sequential, multiple
obstructions can be programmed in at one time, but not
Do not use Auto
Auto Blank
6
exceed a total of eight beams. The Diagnostics Display
will issue a Code 8 if the Auto Blank obstruction(s) is
moved or exceeded the maximum allowable number of
obstructed beams.
Programming. Turn the keyswitch into the OFF/RESET
position and place the obstruction(s) in the guarded area.
Turn the keyswitch into the desired mode of operation.
You will notice that the Diagnostics Display will change
to show you the total number of beams currently being
blocked by the obstruction(s). This display will last for
about two seconds. If an obstruction was detected, the
display will issue a Code 7 to indicate that it has been
programmed into memory. Keep Auto Blank off until
the light curtain is properly aligned and the unit is GREEN
when there are no obstructions.
Auxlllary Output Contact
The Auxiliary Output Contact feature provides either a
N.O. or N.C. isolated (DRY) contact output to signal a
RED condition on the light curtain. This output is used
in conjunction with the standard pair of output relays
that get wired up to the safety circuit of your equipment
(i.e., stop circuit). The standard relay output is monitored,
but the Auxiliary Output Contact is NOT monitored
and should only be used as a signal line (i.e., for
additional PLC monitoring).
The Auxiliary Output Contact can handle 4 AMPS@
120VAC (not fused). S pecify either N.O. (RED when
open) or N.C. (GREEN when open) (see Wiring
Diagram).
Cincinnati Interface*
The Cincinnati Interface feature allows an external device
(i.e., Cincinnati Press, or PLC) to override the light curtain
and initiate a RED condition and open up the standard
output relay contacts. This is provided to allow a PLC to
determine if the light curtain is still capable of shutting
down the safety control circuit.
The external device must provide a 24VDC output to
the light curtain to initiate this RED condition.
have this option, but for some reason do not use it,
you must ground the interface terminal. Failure to
do so could cause the guard to stay in a RED condition
(see Wiring Diagram).
• Although this option is standard, it must be requested at time of
order and cannot be used in conjunction with the External Relay
Check.
If you
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