Where the contacts of a police-connect panel are
needed for polarity reversal, the contacts may be used to
provide a switched-voltage trigger for the dialer, as
shown in figure 8-38. This hookup lets the panels
BELL TEST feature be used without causing any dialer
When using the bell output of an alarm panel as a
switched-voltage trigger for the dialer, always run the
trigger wires directly from the dialer input terminals
to control the panel terminals. Do not run the wires
from the dialer inputs to the bell, horn, or siren
locations; and do not route the sounding-device wires
through the cabinet. Figure 8-39 shows the correct
wiring for this hookup. In this hookup, dialer
terminals 2, 5, and 6 are connected together within
the dialer. This permits a simplified three-wire
trigger connection from the control panel.
Figure 8-38.A switched-voltage trigger connected to a telephone dialer.
Figure 8-39.Wiring diagram for a switched-voltage trigger.