User guide

3. Installation
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recommended cable lengths in metres for 7/0.2 cable, assuming that you
connect all items at the end of a single cable run. In real life you may be able
to improve on these figures by spreading items along the cable length.
7/0.2 8-core cable Length (m)
No items 1 core 2 cores on 0V
and 12V.
One 200 —
Two 100 200
Three 65 130
Four 50 100
It is possible to extend the keypad cable run by using additional power
supplies, but only up to a recommended maximum of 300m
When carrying out the cabling there are two important points to remember:
1. Do not connect anything other than keypads to the keypad bus. The
keypad bus power supply is limited to a maximum of 400mA and can supply
no more than a maximum of four keypads.
2. Make sure that the voltage between 0V and 12V of the keypad bus at the
furthest point from the control unit is at least 12.0VDC when all the keypad
backlights are on.
Note: The following instructions assume that you have already run all the
necessary cabling.
Fitting the System
Fitting the Control unit Case
1. Remove the control unit case from the packing.
2. Remove the front screws and slide off the case lid.
3. The upper part of the case back provides a central keyway. Mark and
drill a hole for the keyway. Temporarily fix the case back to the wall. Now
mark the position of two more fixing holes, remove the case back and
continue to drill the holes.
4. Refit the case back to the wall using not less than 30mm x No 8 Dome or
Pan-head screws.
Fitting a 9930 Keypad
The backplate of the 9930 keypad contains an adjustable cam that you can
use to make sure the tamper switch will operate correctly when the keypad is
mounted on an uneven surface. Figure 4 shows the backplate and the
position of mounting holes.