B404B SYSTEMSENSOR | Alldatasheet
Document overview
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Technical content
Two LEDs “blink” in standby Detector head plugs easily into base Field adjustable sensitivity Built-in test switch Field sensitivity metering of detector to meet the requirements of NFPA 72 120VAC and 24VAC/DC bases with built-in shorting spring Built-in tamper-resistant feature Designed for mounting on standard electrical box SEMS screws for easy wiring and positive wire retention Removable cover and insect screen for field cleaning H V A C S Y S T E M S M O N I T O R I N G Duct Smoke Detector for Special
Applications
(Requires RTC accessory) 2451 with B404BT and RTC (Includes the RTS451) The System Sensor 2451 photoelectronic smoke detector is UL listed to UL 268A specifically for use in no-flow/low-flow air-handling sys - tems. It’s designed for installations where a standard Venturi principle duct smoke detector is unsuitable. This is the perfect combination for installation in ducts where the air velocity is below 500 fpm or for duct sizes as small as 8 inches in diameter. Pendant mounted in a standard electrical box within the duct, the twist-in/twist-out head allows easy removal from the base for quick cleaning and maintenance. The detec - tor can be combined with the System Sensor B404B 120VAC base or the B404BT 24VAC/DC base. Remote testing is accomplished using our Remote Test Coil accessory that includes the RTS451. The APA451, Remote Annunciator with Piezo Alarm, can also be connected to pro - vide an audible and visible indication of smoke detector status. Specifications Operating Voltage/ Alarm current Mounting base dependent (see chart) Standby current 120 mA maximum Sensitivity 3% ± .7% / ft. Weight 0.5 ib. (277 g) Size 3.2˝/8.1 cm height 6.2˝/15.8 cm diameter Construction Flame retardant Noryl plastic Operating Temperature 32° to 120 °F (0° to 49°C) Humidity Range 10 to 93% RH non-condensing Air Velocity Rating 0 to 3000 fpm maximum
Architectural/Engineering Specifications The air duct detector shall be a System Sensor model 2451 Series Smoke detector UL listed to UL 268A specifically for use in air handling systems when used in conjunction with the B404B (120VAC) or the B404BT (24VAC/DC) base. The detector shall operate at air velocities up to 3000 feet per minute. It shall be capable of local testing via magnetic switch or remote testing using the UL listed RTC Remote Test Coil accessory with the RTS451 Remote Test Station. It shall be capable of providing duct smoke detector status via the UL listed model APA451 Piezo Annunciator. Wiring Guide B404B Typical Wiring Diagrams: RA400Z (Optional) RA400Z (Optional) RELEASING DEVICEPOWER RELEASING DEVICEPOWER 7 8 9 10 3 4 RELEASING DEVICE 7 8 9 10 3 4 EOL FIRE ALARM CONTROL PANEL ALARM INITIATION LOOP SPECIFIED BY PANEL MANUFACTURER BLACK LEADS TRANSFORMER PRIMARY
120 VAC 120 VAC
(+) (–) (+) (–) RA400Z (Optional) FAN/DAMPER CONTROLPOWER 7 8 9 10 3 4 EOL FIRE ALARM CONTROL PANEL ALARM INITIATION LOOP SPECIFIED BY PANEL MANUFACTURER BLACK LEADS TRANSFORMER PRIMARY
120 VAC
No. Function
1 Remote Annunciator (+)
2 Not Used
3 Not Used
4 Remote Annunciator (-)
5 Not Used
6 N.O. Supervisory Relay Form A Contacts7 N.O. 8 N.O. Alarm Relay Form A Initiation Contacts 9 N.O. 10 C. 11 C. 12 N.O. Alarm Relay Form C Auxiliary Contacts 13 N.C. 14 C. B404B Base Terminals Base Model Version Loop Type Current Limit resistor Alarm Contact Type Nominal Voltage Alarm Current (mA) B404B UL/ULC 4-wire Yes Form A&C + A supy. 120VAC 20.4 B404BT UL 4-wire Yes Form A&C + A supy. 24VAC/DC rms 94 Base Chart Junction Box Selection Base Model Single Gang 31/2˝ Oct. 4˝ Oct. 4˝ Sq. 50mm 60mm 75mm B404B No No Yes Yes No No No B404BT No No Yes Yes No No No H0270-00 H0271-00
(Optional) RELEASING DEVICE 7 8 9 10
3 APA451
(Optional)1 RELEASING DEVICE 7 8 9 10 3 4 EOL FIRE ALARM CONTROL PANEL CONTROL PANEL ALARM INITIATION LOOP SPECIFIED BY PANEL MANUFACTURER24 VACrms/DC 24 VACrms/DC SPECIFIED BY PANEL MANUFACTURER SUPERVISORY RELAY ALARM RELAY ALARM RELAY SUPERVISORY RELAY EOL NOTE: ABOVE DIAGRAM SHOWS NFPA REQUIRED WIRING OF SUPERVISED SYSTEMS. SCHEMATIC SHOWN BELOW FOR REFERENCE. RTC Wiring Diagram: RTC Ring Replacement of B404BT: TEST COIL 4-POSITION TERMINAL BLOCK 24V 120 VAC VAC 9 10 A B C AVAILABLE POWER INPUTS ALARM AUXILIARY CONTACTS FOR FAN SHUTDOWN, ETC. 16 6 1 7 7 18 8 ALARM AUXILIARY CONTACTS SHOWN IN STANDBY. CONTACTS TRANSFER DURING ALARM AS INDICATED BY THE ARROWS. SUPERVISORY TROUBLE CONTACTS TROUBLE CONTACTS CLOSED IN ALARM AND STANDBY. CONTACTS OPEN WHILE DETECTOR PCB OR POWER IS REMOVED OR WHEN TAMPER FEATURE TIMES OUT. OPEN CONTACTS SIGNAL TROUBLE CONDITION TO PANEL. 24V VAC 9 1 0 A B C AVAILABLE POWER INPUTS ALARM AUXILIARY CONTACTS FOR FAN SHUTDOWN, ETC. 16 6 17 7 1 8 8 ALARM AUXILIARY CONTACTS SHOWN IN STANDBY. CONTACTS TRANSFER DURING ALARM AS INDICATED BY THE ARROWS. SUPERVISORY TROUBLE CONTACTS TROUBLE CONTACTS CLOSED IN ALARM AND STANDBY. CONTACTS OPEN WHILE DETECTOR PCB OR POWER IS REMOVED OR WHEN TAMPER FEATURE TIMES OUT. OPEN CONTACTS SIGNAL TROUBLE CONDITION TO PANEL. 14 3 314 ALARM INITIATION CONTACTS CONTACTS SHOWN OPEN IN STANDBY. CONTACTS CLOSE IN ALARM. ALARM INITIATION CONTACTS CONTACTS SHOWN OPEN IN STANDBY. CONTACTS CLOSE IN ALARM. ALARM INITIATION LOOP UL LISTED 4-WIRE CONTROL PANEL FIRST DETECTOR IN THE LOOP DH100ACDCLP LAST DETECTOR IN THE LOOP DH100ACDCLP EOL RESISTOR SPECIFIED BY PANEL MANUFACTURER CONNECT POWER SOURCE TO APPROPRIATE TERMINALS OF EACH DETECTOR. SEE SPECIFICATIONS FOR ADDITIONAL POWER SUPPLY INFORMATION. FOR WIRING OF AUXILIARY DEVICES, REFER TO MANUFACTURER'S INSTALLATION INSTRUCTIONS OR CONTACT MANUFACTURER. NOTE: THE SUPERVISORY RELAY NOW PROVIDES A "FORM C" CONTACT FOR CUSTOMIZED APPLICATIONS. FOR STANDARD APPLICATIONS, ONLY THE "NO" CONTACT IS USED POWER INPUTS ACCEPT
24 VDC, 24 VAC 50-60 HZ,
120 VAC 50-60 HZ, OR
220/240 VAC 50-60 HZ. CONNECT POWER SOURCE TO APPROPRIATE TERMINALS OF EACH DETECTOR. AUX. CONTACT RATINGS 10A @ 30 VDC RESISTIVE 10A @ 250 VAC 100mA MINIMUM @ 5 VDC NOT INTENDED FOR CONNECTION TO CONTROL PANELS. TROUBLE CONTACT RATING
2.0 A @ 30 VDC resistive
2.0 A @ 125 VAC resistive
B404BT Typical Wiring Diagrams: APA451 (Optional) FAN / DAMPER SHUTDOWN 7 8 9 10
24 VACrms/DC
No. Function
2 Test Coil (+)
5 RTC (-)
6 N.O. Supervisory Relay Form A Contacts7 N.O. 8 N.O. Alarm Relay Form A Initiation Contacts 9 N.O. 10 C. 11 C. 12 N.O. Alarm Relay Form C Auxiliary Contacts 13 N.C. 14 C. B404BT Base Terminals H0268-00 H0269-00 B404B/B404BT RTS451 REMOTE ANNUNCIATOR (+) TEST COIL (+) RTC (–) ALARMTEST COIL FIELD INSTALLED JUMPER H0272-00 H0233-00
© 2004 System Sensor. The company reserves the right to change product specifications without notice. A05-0952-001•1/04•#1228 ALARM POWER ALARM RESET
Ordering Information
Part No. Description
2451 Photoelectronic plug-in detector (order one of the bases
listed below and the RTC) B404B 120VAC detector base B404BT 24VAC/DC detector base System Sensor Sales and Service System Sensor Headquarters
3825 Ohio Avenue
St. Charles, IL 60174 Ph: 800/SENSOR2 Fx: 630/377-6495 Documents-on-Demand 800/736-7672 x3 www.systemsensor.com System Sensor Canada Ph: 905.812.0767 Fx: 905.812.0771 System Sensor Europe Ph: 44.1403.891920 Fx: 44.1403.891921 System Sensor in China Ph: 86.29.524.6253 Fx: 86.29.524.6259 System Sensor in Singapore Ph: 65.273.2230 Fx: 65.273.2610 System Sensor – Far East Ph: 85.22.191.9003 Fx: 85.22.736.6580 System Sensor – Australia Ph: 613.54.281.142 Fx: 613.54.281.172 System Sensor – India Ph: 91.124.2371770 x.2700 Fx: 91.124.237.3118 APA451 Piezo Annunciator RTS451KEY Remote Test Station (provided with Remote Test Coil) RA400Z Remote Annunciator Top Mount in Ventilation Shaft Accessories Description RTC Remote test coil kit (Includes RTS451 remote test station) APA451 Remote annunciator with piezo alarm RA400Z Remote annunciator