2424AIT - System Sensor

400 Series™
Direct-Wire Photoelectronic
Smoke Detector
A Division of Pittway
3825 Ohio Avenue, St. Charles, IL 60174
1-800-SENSOR2 (736-7672), Fax 630-377-6495
http://www.systemsensor.com
Models Available
2400/2400A Photoelectronic
2400TH Photoelectronic with Thermal
2400AT Photoelectronic with Thermal and Horn
2400AIT Photoelectronic with Isolated Thermal and Horn
2412B/2412BA Photoelectronic
2412THB Photoelectronic with Thermal
2412AT Photoelectronic with Thermal and Horn
2424 Photoelectronic
2424TH Photoelectronic with Thermal
2424AT Photoelectronic with Thermal and Horn
2424AIT Photoelectronic with Isolated Thermal and Horn
Features
• 12 or 24 volt operation
• Unique optical sensing chamber
• Removable cover and insect screen for easy
cleaning
• Visible LED blinks in standby, latches on in
alarm
• Sealed against dirt, insects, and back pressure
• Field sensitivity metering of detector to meet NFPA 72
requirements
• Twist-on mounting bracket with tamper option
• SEMS screws for easy wiring
• 3-year warranty
• Optional built-in 135°F (57° C) heat sensor
• Optional built-in 85 dBA horn
Specifications
Size:
3.2″ (8.1 cm) h, 5.5″ (13.9 cm)
dia. with mounting bracket;
add .5″ (1.27 cm) to height for
thermal
Shipping Weight:
0.5 lb. (227 g)
Operating Temperature Range:
Thermal Models:
32°F to 100° F (0° C to 38°C)
All Other Models:
32°F to 120° F (0°C to 49°C)
Operating
Humidity Range:
10 – 93% RH noncondensing
Air Velocity Rating:
3000 fpm
Wiring Gauge:
12 – 18 AWG, twisted pair
recommended
Mounting:
31/ 2″ or 4″ octagon box,
4″ square box with plaster ring,
50, 60, 75 mm boxes
Smoke Detector Spacing:
On smooth ceilings (as defined in NFPA 72), spacing
of 30 feet (900 sq. ft.) may be used as a guide. Other
spacing may be used depending on ceiling height,
high air movements, and other conditions or response
requirements.
© System Sensor 8/96
Sensitivity:
3.0% ± .7 ft. nominal
Test Features:
1. Test port – Insert 0.1 inch maximum diameter allen
wrench or screwdriver into test port on detector
housing.
2. Test card – After removing detector cover, insert
calibrated test card into test slot on screen.
3. Test module – Using a standard voltmeter interface,
insert MOD400R plug into detector’s module port.
Fulfills calibrated sensitivity test per NFPA 72.
Thermal Sensor Rating
(thermal models only): 135° F fixed temperature
restorable
Audible (AT/AIT
models only):
Piezoelectric horn,
85 dBA @ 10 ft.
This document is not intended to be used for installation purposes.
APPROVED
A05-194-03
General Description
System Sensor 400 Series photoelectronic detectors are
specifically designed to meet the stringent performance
requirements of industrial and commercial fire detection/
alarm systems. The design of these detectors emphasizes
ease of installation and field maintenance.
The 400 Series offer 11 different photoelectronic detectors
with a variety of voltages, wiring configurations, thermal
options, and piezo horns.
Electrical Specifications
Control
Model
Product
Panel
2400
Photo Detector
2-wire
2400TH
Photo Detector w/Fixed Heat Sensor
2-wire
2400AT
Photo Detector w/Fixed Heat Sensor & Horn
2-wire
2400AIT
Photo Detector w/Isolated Heat Sensor & Horn
2-wire
2412B
Photo Detector
4-wire
2412THB Photo Detector w/Fixed Heat Sensor
4-wire
2412AT
Photo Detector w/Fixed Heat Sensor & Horn
4-wire
2424
Photo Detector
4-wire
2424TH
Photo Detector w/Fixed Heat Sensor
4-wire
2424AT
Photo Detector w/Fixed Heat Sensor & Horn
4-wire
2424AIT
Photo Detector w/Isolated Heat Sensor & Horn
4-wire
* Must be limited by control panel
Relay Contact Ratings:
Resistive or inductive
(60% power factor) load
Alarm Contacts
Form A:
2.0A @ 30 VAC/DC
Form C:
2.0A @ 30 VAC/DC
0.6A @ 110 VDC, 1.0A @ 125 VAC
Reset Time:
.3 sec. (max.)
Startup Time:
34 sec. (max.)
Operating
Voltage
12/24 VDC
12/24VDC
24 VDC
24 VDC
12 VDC
12 VDC
12 VDC
24 VDC
24 VDC
24 VDC
24 VDC
Auxiliary
Contacts
No
No
No
No
Yes
Yes
No
Yes
Yes
No
No
Remote LED
Option
Yes
Yes
Yes
Yes
No
No
Yes
No
No
Yes
Yes
Current Consumption
Standby (max.)
Alarm (max.)
120 µA
*
120 µA
*
120 µA
67mA
120 µA
67mA
120 µA
77mA
120 µA
77mA
120 µA
51mA
120 µA
41mA
120 µA
41mA
120 µA
43mA
120 µA
43mA
Engineering Specifications
Smoke Detector shall be a photoelectronic type (model
2400, 2412, 2424) or a combination photoelectronic/
thermal (model 2400TH, 2412TH, 2424TH) with thermal
sensor rated at 135° F as manufactured by System Sensor.
Wiring connections shall be made by means of SEMS
screws. The detector will have a visible LED which will
blink in standby and latch on in alarm. The detector shall
have a nominal sensitivity of 3% per foot as measured in
the UL smoke box. The detector screen and cover should
Page 2
be easily removable for cleaning. It shall be possible to
perform a sensitivity and functional test without the need
of generating smoke. Detector circuitry shall perform a self
test on the sensing chamber and internal electronics every
40 seconds. If circuitry fails, the detector LED shall stop
blinking. The detector shall have a mounting bracket that
allows for mounting to a 31/ 2″ or 4″ octagon box or 4″
square electrical box.
A05-194-03
400 Series Wiring Guide
(–)
EOL
RESISTOR
(+)
(+)
(+)
2
(+)
REMOTE
3 LED
(+)
(–)
2
(+)
1
RA400Z
REMOTE
3 LED
(+)
(–)
1
RA400Z
(–)
(–)
OPTIONAL
2400/2400TH/2400AT
Wiring Diagram
OPTIONAL
OPTIONAL CLASS “A” LOOP
EOL
RESISTOR
(–)
(+)
SMOKE DETECTION LOOP
(+)
2
(+)
3
4
OPTIONAL
(–)
(+)
2
(+)
1
3
N/O
4
5
RA400Z
(–)
2400AIT
Wiring Diagram
1
N/O
5
RA400Z
(–)
OPTIONAL
(–)
EOL
RESISTOR
THERMAL DETECTION LOOP
(–)
POWER FROM
CONTROL PANEL
(+)
(+)
2
(+)
COMMON
2
N/O
1 (–)
N/C
N/O 8
7
4
5
6
COMMON
1 (–)
N/O
N/C
BLACK
RED
N/O 8
7
4
5
A77-716B
12/24 VDC EOL
RELAY
6
ALARM CIRCUIT
FROM CONTROL PANEL
PURPLE
PURPLE
2412B/THB, 2424/TH
Wiring Diagram
EOL
RESISTOR
(–)
BLACK
REMOTE (+)
LED (+)
2
3
4
N/O
(–)
(+)
OPTIONAL
1
N/O
8
4
(–)
N/O
N/O
5 7
RA400Z
(–)
(–)
1
8
PURPLE
5 7
RA400Z
REMOTE (+)
LED (+)
2
3
PURPLE
(+)
OPTIONAL
RED
A77-716B
12/24 VDC
(+)
EOL
RESISTOR
ALARM CIRCUIT
ALARM CIRCUIT
2412AT, 2424AT, 2424AIT
Wiring Diagram
Page 3
ISOLATED THERMAL DETECTION LOOP
MODEL:
EOL
RESISTOR 2424 AIT
ONLY
A05-194-03
Ordering Information
Part No.
Description
Two-Wire Models
2400
Photoelectronic detector, 2-wire, 12/24 VDC
2400A
Same as above, Canadian model
2400TH
Photoelectronic detector, 2-wire, 12/24 VDC with
built-in 135° F fixed heat sensor
2400AT
Photoelectronic detector, 2-wire, 24 VDC with
integral 135° F fixed heat sensor and 85dBA horn
2400AIT
Photoelectronic detector, 2-wire, 24 VDC with
isolated 135° F fixed heat sensor and 85dBA horn
Four-Wire Models
2412B
Photoelectronic detector, 4-wire, 12 VDC, with
auxiliary contacts
2412BA
Same as above, Canadian model
2412THB Photoelectronic detector, 4-wire, 12 VDC, with
auxiliary contacts and integral 135° F fixed heat
sensor
2412AT
Photoelectronic detector, 4-wire, 12 VDC, with
integral 135° F fixed heat sensor and 85dBA horn
2424
Photoelectronic detector, 4-wire, 24 VDC, with
auxiliary contacts
2424TH
2424AT
2424AIT
Photoelectronic detector, 4-wire, 24 VDC, with
auxiliary contacts and integral 135°F fixed heat
sensor
Photoelectronic detector, 4-wire, 24 VDC, with
integral 135°F fixed heat sensor and 85dBA horn
Photoelectronic detector, 4-wire, 24 VDC, with
isolated 135°F fixed heat sensor and 85dBA horn
Accessories
A77-716B End of line relay for power supervision, 12/24 VDC
RA400Z
Remote annunciator for 2 or 4 wire systems, 3-32V –
Use with ion and photo detectors. Fits standard U.S.
single gang electrical box. (See below.)
MOD400R Detector sensitivity test module – Use with most
analog or digital multimeters. Satisfies requirement
of NFPA 72 for sensitivity testing. (See below.)
RS24
Replacement insect screen for 2400, 2412B, 2424
RS24T
Replacement insect screen for 2400TH/AT/AIT,
2412THB/AT and 2424TH/AT/AIT
DUST45
Replacement protective dust cover for 400 Series
The MOD400R Field Sensitivity Test Module can be used with
any standard DC voltmeter or multimeter to check the
sensitivity range of System Sensor’s detectors (satisfies NFPA
72 requirement for sensitivity testing).
RA400Z Remote
Annunciator, 3 – 32V
Use with ion and photo
detectors that have remote
annunciator output
System Sensor Worldwide Distribution
In Canada:
System Sensor Canada
6581 Kitimat Road, Unit #7
Mississauga, Ontario
Canada L5N 3T5
Telephone: 905-812-0767
Fax: 905-812-0771
Page 4
In the United Kingdom:
System Sensor Europe, Ltd.
Horsham Gates III, North St.
Horsham, West Sussex
RH13 5PJ, United Kingdom
Telephone: 44-1403-276500
Fax: 44-1403-276501
In India:
System Sensor India
A-204 Maheshwari Nagar
Orkay Mills Lane
Andheri East, Mumbai 400093
Telefax: 91-022-8202564
In the Far East:
System Sensor
Pittway Far East, Ltd.
Suite 706, New T&T Centre
7 Canton Road
Tsimshatsui, Kowloon, Hong Kong
Telephone: 852-2730-9090
Fax: 852-2736-6580
A05-194-03