ICS-6 Instruction Manual
01000-53-000
Page 26 of 42
Issue 11 19 January 2021
5.5.2
Override Switch with Timer
If the ICS-KP12 keypad is not used the optional Lasermet Override Board allows an interlocked door
to be opened for a short time without interrupting the laser. When the override is activated, a
warning indication is shown on the ICS-6 and a buzzer sounds.
The Override board must be fitted to the ICS-6 by inserting the male connector on the plug-in board
into the female connector near the bottom of the main board of the ICS-6 on the back of the door.
Align the hole in the Override board with the peg on the ICS-6 main board and insert the screw and
washer to secure it in position. Ensure the jumper link J6 ‘O/RIDE CTRL’ on the ICS-6 Main Circuit
Board is set open. The override is time-limited, and the duration of override can be adjusted
between 6 and 27 seconds by adjusting the potentiometer marked R19, on the Override board.
Turn clockwise to increase the time and anticlockwise to decrease it.
The standard Override Board provides a set time of up to 27 seconds which cannot be extended by
repeated pressing of the override button. If it is found that the time delay is insufficient Lasermet
can supply a retriggerable Override Board, in which the time delay is extended if the override button
is pressed again before the timer runs out. The time delay can be extended up to a maximum of
around 90 seconds by this means.
To activate the override function, connect one or more switches in parallel between the terminal
marked ‘O/R’ and the terminal marked ‘+24V’ on the ‘KEYPAD’ terminal block J7. When activated
the switch should momentarily connect the two terminals together. Lasermet supply suitable
pushbuttons and keyswitches for operating the override function, or it may be activated
automatically by a volt-free contact on access control systems.
The diagram below shows a typical installation with Override pushbuttons on both sides of a door.
By using keyswitches instead of buttons, unauthorised use of the override can be prevented.
Override
Button
Override
Button
+24V
REM
O/R
0V
KEYPAD
O/R A
O/R B
If the door has a maglock fitted the override pushbuttons should be equipped with a second contact
which opens to de-energise the lock when the button is pressed.
The override may also be activated by other equipment such as site-specific access control systems.
If in doubt, please contact Lasermet.
