8K3 Series Cross-Beam Mute Accessories
Installation Guide
CD693/150120
Smartscan Ltd
6
The entry/exit invert
ed ‘T’ mute beams have a scanning range of 1.25m to 3.5m.
Position the unit to ensure a pallet load does not stop in the safety light curtain
beams after clearing the mute beams.
Exit only
‘L’
087- 004 (Type 2)
The ‘L’ shape cross-beam muting is only for use at outfeed zones. You will note
that the mute beams are arranged on one side of the 8K3 safety light curtain. The
pallet load is always travelling in one direction, out from the danger area and
through the safety light curtain to the safe area.
The system works by the pallet load moving into the two mute beams and
interrupting them within the monitored mute disparity time of 2.5 seconds.
T
here is a short period of time when the trailing edge of a pallet load ‘clears’ the
detection field of both mute sensors but is still interrupting the light curtain beams.
A timer is incorporated within the safety control system that allows a period of 2.5
seconds between the pallet load ‘clearing’ the mute sensors and ‘clearing’ the
light curtain beams. If the 2.5 second period is exceeded the safety system will
trip.
Note for this exit system the MODE wire (Black/White) needs to be linked to +24V
DC in order for the 2.5 second mute delay-off timer to be active.
The exit only ‘L’ mute beams have a scanning range of 1m to 3.5m
Position the unit to ensure a pallet load does not stop in the safety light curtain
beams after clearing the mute beams.
Mute Enable Input
The ‘mute enable’ signal is a control system requirement for both entry/exit and
exit only cross-beam muting applications. This third signal is typically taken from
the conveyor transport system (conveyor run). This signal acts as a permissive
signal to the mute beam logic.
Inclusion of the signal indicates to the safety control that the conveyor is
transferring products towards the detection field of the safety light curtain, thus
instructing the controller to initiate the MUTE logic condition during a pallet
transfer through the safety light curtain.
Warning:
The ‘L’ shape mute module must
NOT
be used at in-feed zones, (out-
feed only).