
CONTROLLING EXTERNAL ALARMS & CHIMES
CONNECTION USING DRY CONTACTS & EXTERNAL POWER
NEG +24V NO NC C
External 24VDC Bell
DA-500 Whistle Switch ON
Capacitor
0.1 Microfarads 100 Volt (min)
Adding a capacitor extends the
life of the relay.
NOTE: If internal piezo whistle is not wanted, move the DA-500 Whistle Switch to
the OFF position and connect the jumper between +24 and the C Terminal
NOTE:
Limit of two external bells
BELL
4
5 6 7 8
RELAY
4
5 6 7 8
1N4004 DIODE
Adding the diode extends
the life of the relay.
External Relay Hookup
24VDC
To AC operated
CHIMES/ALARMS
NEG +24V NO NC C
NEG +24V NO NC C
BELL
DA-500 Whistle Switch
MUST be OFF
External Power
Capacitor
0.1 Microfarads 100 Volt (min)
Maximum current linited to 1 AMPERE
Maximum Voltage - 24 VOLTS (DO NOT apply 120VAC to terminals)
4
5 6 7 8
RED BLK SHLD NEG +24V NO NC C
UNREG
--- SENSOR --- --- RELAY ---
41 2
3
5 6 7 8
DO NOT CONNECT TO 120V AC
6
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