D450-09-00
3
I56-451-02
Wiring Instructions
CAUTION
For system supervision — For terminals 2, 3, and 5 do not
use looped wire under terminals. Break wire run to provide
system supervision of connections.
Wire connections are made by simply stripping insulation
from the end of the wire, sliding the bare end of the wire
under the clamping plate, and tightening the clamping
plate screw. Use the strip gauge molded into the base for
ease of wiring to terminals 1 through 5.
System Sensor smoke detectors and mounting bases are
marked with a compatibility identifier located as the last
digit of a five digit code stamped on the back of the prod-
uct. Connect detectors/mounting bases only to compatible
control units as indicated in System Sensor’s compatibility
chart which contains a current list of UL listed control units
and detector head/base combinations. A copy of this list is
available from System Sensor upon request.
The zone wiring of the detector base should be checked
before the detector heads are installed in them. To make
this possible, this base contains a special spring-type short-
ing jumper. After a detector base is properly wired and
mounted on an electrical box, make sure that the jumper
spring is in contact with the base of Terminal 3. This tem-
porary connection shorts the negative-in and negative-out
A78-1175-05
Figure 2. Typical wiring diagram for 2-wire detector systems:
REMOTE
ANNUNCIATOR
2
1
3
5
4
+
–
2-WIRE CONTROL PANEL
+
–
REMOTE
ANNUNCIATOR
2
1
3
5
4
+
–
E
O
L
CLASS A OPTIONAL WIRING
NOTE: IF REMOTE ANNUNCIATOR
IS NOT USED, POLARITY TO
THESE TERMINALS MAY BE
REVERSED.
leads and permits the wiring of the loop to be checked for
continuity.
Once all the detector bases have been wired and mounted,
and the loop wiring has been checked, the detector heads
may be installed in the bases. The shorting spring in the
base will disengage automatically when the detector head
is removed from the base. DO NOT remove the shorting
spring since it reengages as the detector head is turned into
the base, completing the circuit.
Tamper-resistance Feature
CAUTION
Do not use the tamper-resistance feature if the XR5 removal
tool is to be used.
The tamper-resistant tab, in the detector mounting bracket,
can make the detector tamper-resistant by making it neces-
sary to use a small screwdriver or similar tool to detach the
detector from the bracket.
To make the detector tamper-resistant, use needle-nose pli-
ers to break the smaller tab at the scribed line on the
tamper- resistance tab. Figure 3A (on page 4) shows the lo-
cation of this tab on the detector mounting bracket. To re-
move a detector from the bracket after it has been made
tamper resistant, use a small screwdriver or other similar
tool, to depress the tamper-resistance tab in the slot on the
