Conventional Products—2412, 2412TH, 2424, and 2424TH Direct Wire Photoelectronic Smoke Detectors 5
Table 2: Specifications Summary
Specifications
Diameter
5.5 in. (140 mm)
Height
3.19 in. (81 mm)
Add 0.5 in. (13 mm) for all models with a “T” suffix
(i.e., 2400TH)
Weight
0.7 lb (318 g)
Operating Temperature Range
Models 2412 and 2424--32 to 120°F (0 to 49°F)
Models 2412TH and 2424TH--
32 to 100°F (0 to 38°C)
Operating Humidity Range
10 to 93% RH, Non-condensing
Maximum Air Velocity
3,000 ft/min. (15m/s)
Latching Alarm
Reset by momentary power interruption
Minimum of 0.3 seconds to reset
Fixed Temperature Head Detector
135
°
F (57
°
C)
Electrical Ratings
2412
2424
System Voltage
12 VDC
24 VDC
Maximum Ripple Voltage
4 volts Peak-to-Peak
Supply Voltage (Min./Max.)
11.3/17 VDC
20/29 VDC
Reset Voltage (Control panel must
fall below 2.4 volts to reset.)
0.73 VDC Minimum
0.8 VDC Minimum
Standby Current
120 Microamperes Maximum
Alarm Currents (Min./Max.)
35/77 Milliamperes
21.3/40.6 Milliamperes
The alarm and auxiliary relay operate within the specified voltage ratings.
Startup Time (Internal Power
Supply Needs to Charge)
34 Seconds Maximum
EOL Relay
A77-716B
Reset Time
0.3 Seconds
Relay Contacts - Resistive or Inductive Load (60% power factor)
Form-A:
Contact Maximum Current
2.0A @ 30 VAC/DC
Form-C*
1.0A @ 125 VAC
2.0A @ 30 VAC
* Contact rating for Canadian
installations
0.6A @ 110 VDC
2.0A @ 30 VDC
