7000 SERIES
Start/restart (F9) - A suitable push button or key switch with a N/O
contact must be fitted across terminals J6/12 and J6/13 to reset the light
curtain when in the following modes; Start interlock, Restart interlock,
Start + Restart interlock.
Floating blanking (F10) - Floating blanking allows selected areas of
the detection zone to be disabled. The function is particularly useful for
those applications where, for example, a work piece is obstructing the
light curtain or possibly moving up and down within the curtain.
The 7000 Series has the capability of 1, 2 and 3 beam floating blanking,
offering much increased flexibility.
Floating blanking can be selected to allow one, two or three beam
obstructions within the light curtain to be ignored. The obstruction can
move or ‘float’ within the detection zone without initiating a stop signal
providing the obstruction does not interrupt more than the selected
number of ‘floating’ beams. If one beam blanking is selected, any
single beam in the light curtain can be blocked without the guard
outputs de-energising. If two beam floating blanking is selected any two
beam obstruction can be ignored. With three beam blanking any three
beams blocked will be ignored. The interrupted beams do not have to
be adjacent to each other.
Beam blanking is selected by connecting appropriate input signals to
the following terminals on the control module: +24V at J1/7, 0V at J1/8,
+24V at J1/9 and 0V at J1/10. For connection details refer to Fig. Q.
Note: The input signal must be applied within 200ms of each other. If
this time is exceeded the system will go to a lockout condition.
The signals may be applied during operation of the guard and
will take immediate effect. This feature can be used to increase
the integrity of a guarding application (partial muting).
Note: Beam blanking increases the size of object which is guaranteed
to be detected by the light curtain. (An increased ODC). When
selecting 1, 2 or 3 beam floating blanking the worst case ODC
should always be taken into account during the risk assessment
process. Check the position of the light curtain in relation to the
nearest danger point is in line with the requirements of
European Standard BS EN 999.
