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from the beams; whilst the microwave sensor is more sensitive
to movement towards and away from the sensor.
During installation, protect the electronics against water, as
trapped moisture can affect or damage the unit.
We recommend that the cable entry and screw mounting holes
be sealed from within the detector using acrylic (non-silicone
based) sealants.
Note:
When locating the detector, please ensure the detector's
field of view is unobstructed.
To mount the detector:
1.
Drill the wall to accept the two fixing screws, the cable
entry, and the tamper cup (if used). See Figures 1 and 3.
A hole-drilling template is provided.
Notes
•
Leave a minimum 10 cm (4 inches) clearance above
the top of the detector housing to allow the cover and
the detector to be positioned correctly.
•
We recommend using the tamper cup on uneven wall
surfaces. See Figure 3.
•
When mounting the units side by side, a minimum space
of 1 m must be left between the detectors, and the
detectors must not be looking directly towards each other.
No minimum space is required when mounting the units
back to back.
•
The recommended optimum mounting height for the
detector is 3 m. Whilst it is possible to mount the unit
higher, this will give a reduced detection range and will
require the detection subject to move further through the
already reduced detection area before activation is
signalled.
2.
Remove the cover assembly by loosening the locking
screw. Squeeze the sides of the front cover to release the
internal catches. The cover hinges from the top and lifts
out of the location slot. See Figure 2.
3.
Use a razor knife to open a rubber seal to allow the
cabling into the unit (see Figure 4). Feed standard eight-
core or 12-core alarm cable though the wall and directly
into the cable entry. Bare the wires and connect to the top
PCB terminal block (see Figure 15).
Caution:
Do not allow the cable to be trapped between the
rear gasket and the mounting surface as this may cause water
ingress. For surface mount cables use the conduit knock-out at
the bottom of the detector. Refer to Figure 1 for good and bad
cable routings.
4.
Screw the unit to the wall ensuring that the tamper pin is
correctly located and that the tamper micro-switch is
closed. Always ensure the detector base is screwed tightly
to the wall so that the tamper foot is pushed into the rear
rubber gasket. On uneven surfaces use the tamper cup
and locate the tamper foot into the cup. Drilling template is
provided.
To aid installation, two spare tamper feet are provided.
One is 1 mm shorter and the other is 1 mm longer than the
tamper foot originally fitted. The tamper foot is a push fit
and can be removed by carefully pulling it from the pin.
See Figure 1.
4 / 47
5.
When the detector is aligned, connected, and
programmed to suit the installation:
a.
Fit the cover to the detector base.
b.
Lightly screw the locking screw.
c.
Put the top of the locking tool into the small notch on
each side of the cover, and then apply slight pressure
until the cover locks into the base, as shown in
Figure 5.
d.
Tighten the locking screw.
Connecting the unit
The DDI602AM includes jumpers that let you configure internal
Triple End-of-Line (TEOL) resistor values, when TEOL
resistors are required. Values are: 1, 2.2, 3.3, 4.7, 5.6, and
6.8 kΩ for Alarm and Tamper (DEOL resistors). The values are
2.2, 3.3, 4.7, 5.6 and 10 kΩ for Fault/Anti-Mask.
When using TEOL connections insert the TEOL jumper and
select the three required resistor values for Fault/A Mask,
Alarm and Tamper.
When using DEOL connections remove the TEOL jumper and
select the two required resistor values for Alarm and Tamper.
Figure 15 shows:
1.
TEOL resistor jumpers
2.
Wiring points
3.
TEOL enable used in conjunction with a jumper at the
required resistance.
Figure 15 legend
Item
Description
J TEOL
Jumper to enable TEOL. Figure 15a, item 1.
Ja
Jumper to set EOL resistor value for alarm. Figure 15a,
item 2.
Jt
Jumper to set EOL resistor value for standby. Figure 15a,
item 3.
Jf
Jumper to set EOL resistor value for fault. Figure 15a,
item 4.
Alternatively, you can remove the jumpers and connect a
discrete resistor directly to the alarm, tamper or Fault/Anti-
Mask outputs as specified by third-party equipment.
The wiring schematic in Figure 15 shows how to connect the
detector. The examples below show how to calculate DEOL
and TEOL values.
Single zone TEOL Calculation Example
Event
Default (Ohm)
TAMPER (SHORT)
0
STANDBY
4K7
ALARM
9K4
FAULT
14K7
ANTI MASK
19K4
TAMPER (OPEN)
Inf.
Example using 4k7 Tamper, 4k7 Alarm and 10k Fault/A-M
resistors, also TEOL jumper selected. Remove all jumpers for
isolated outputs.
P/N 146655999-1 • REV A • ISS 30JUN14
CALCULATION
CLOSED CIRCUIT
Rt
Rt + Ra
Rt + Rf
Rt + Ra + Rf
OPEN CIRCUIT
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