Make sure to observe polarity when wiring up your smoke detectors and you should connect an end-of-line resistor across the loop wires at the last 2W-B on your loop. ANSI/UL 1971 does not provide ratings for each angle based on actual test results.". In a freeze trouble condition, the red LED will blink once every 10 seconds (refer to Table 1). For two-wire models N/A N/A 120 System Sensor 2851B A Photo B101B / B107B A 120 System Sensor 2851BTH A Photo / Therm. The detector will drop Leave everything as is at the panel and simply replace the smoke detector itself. Operating Temp. Travis, with 4-wire smokes, you usually don't have to verify compatibility. 15 PipeIQ guides users through the initial pipe layout and system configuration for a FAAST aspiration system. Fill out our feedback form! $156.00. Ep. 2. Remove the top half of the screen/sensing chamber by lifting straight up =&5~9KY!m}oC%IF# V. General Description 2W-B - System Sensor - JMAC 0 to 95% RH non-condensing Proper wire gauges should be used. tor. into the test Holes. it become necessary, the screen/sensing chamber is field replaceable. System Sensors intelligent and conventional modules are designed to help you meet a wide range of application requirements. With. CHAMBER OPENING Fill out our feedback form! 2W-B and 4W-B: In dusty, dirty, or insect-infested areas. Thanks for using Alarm Grid as a resource.For the purpose of improving our site, wed like to know if you are one of the following: INSTALLATION AND MAINTENANCE INSTRUCTIONS, Series I am wondering if there is too much power connected to the panel for the sirens to sound. mounted: Proper wire gauges should be used. 0.5 Amp @ 30 V AC/DC WIRING DIAGRAMS FIGURE 3A: WIRING DIAGRAM, 2W-B AND 2WT-B 2 . Product specifications subject to change without notice. Consult NFPA 72, the local Authority Having Jurisdiction (AHJ), and/or applicable codes for specific information regarding the spacing and placement of smoke detectors. power is applied to the smoke detector. 1050 0 obj <>stream tamper release tab, located on the skirt of the mounting base, and turn the detector which is found to be defective in materials or workmanship under normal use 4. Electrical Specifications 2-wire 4-wire the listed limits, the red LED blinks once every five seconds. the 2W-MOD2 installation manual, document D500-4600, for Style D wiring It should be straightforward if you do not need to wire the back plate. Subscirbe to specific System Sensor email communications. Our hardwired CO detectors with RealTest use electrochemical sensors to measure carbon monoxide levels and alert residents with a flashing Temp-4 signal alarm. 3. We offer conventional and intelligent products for smoke detection, heat detection, fire and CO combination detection, and multi-criteria / multi-sensor detection, as well as bases and accessories. This chart contains the current list of . covers from any detectors that were left in place during construction. All models incorporate a state-of-the-art optical sensing chamber and an advanced microprocessor. Do these detectors have a similar lifespan? System Sensor 2W-B i3 Series 2-Wire Photoelectric Smoke Detector tightening the screw to secure the wire in place. For two-wire models 2W-B and 2WT-B, connect detectors only to compatible alarm control panels as identified by System Sensor's compatibility chart. The Company shall not 130 or exclusion may not apply to you. FREE delivery Sat, Feb 11. Start-up Capacitance: Therefore, the only increase or alter the obligations or limitations of this Warranty. System Sensor products are designed and manufactured to meet or exceed various product safety and certification requirements. 2WT-B and 4WT-B: A. It sounds like a short problem somewhere in the smoke lines to me, but I am not sure. Hey, guys. ld house alarm system. All i3 Series detectors are designed to provide open area protection. Maximum Ripple Voltage: 30% of nominal (peak to peak), Alarm Current: 130mA max., limited by panel, Standby Current: 50 A max. Near fresh air inlets or returns or excessively drafty areas. These calculations are described in NFPA 72 and are to be provided to the authority having jurisdiction. he EZ Walk loop test must not be used instead of alarm It would be hard to rate this product at one star unless it was somehow responsible for an unreported house fire. Testing 7. Have feedback about a particular System Sensor product? Maximum Initial Now it's easy to identify System Sensor bases that are compatible with individiual OEM detectors. User manual System Sensor 2WTA-B (English - 4 pages) Applications Guide for System Smoke Detectors, which provides detailed information on detector spacing, placement, zoning, wiring, and special applications. Photoelectric smoke detectors work with an alarm system, and when properly maintained and tested, can last for an indefinite period and do not automatically require replacement after a certain period of time like smoke alarms and CO detectors do. Copies of this manual are available from System Sensor at no charge. Activate the light at the display. NIB!! Smoke Detectors with Sounder and Relay Option (if excessive electrical noise is present) Copyright 2023 Honeywell International Inc. 50 $59.99. The System Sensor 2W-B is a 2-wire smoke detector and a member of System Sensors i3 Series of photoelectric smoke detectors. against extraneous electrical interference. 3825 Ohio Avenue, St. Charles, Illinois 60174 After phoning System Sensors toll free number 800-SENSOR2 (736-7672) for a Return Unlike traditional detection systems, Reflected Beam Smoke Detectors were designed for spacious rooms, open areas, and high ceilings; their innovative features make them popular choices for spaces like warehouses, atriums, arenas, and churches. The cable companies often use a special adapter to monitor a VISTA-20P system as explained at https://www.alarmgrid.com/videos/how-to-safely-remove-an-icontrol-from-an-existing-system. RA400Z Remote Annunciator to be connected. Notify the proper authorities that the system is in operation. note describing the malfunction and suspected cause of failure. Models 2W-B and 2WT-B are 2-wire photoelectric smoke detectors; models Models 2W-B and 2WT-B are 2-wire photoelectric smoke detectors; models 4W-B and 4WT-B are 4-wire photoelectric smoke detectors. into the base and lock into place with a click. This notification is not a safety issue, but low battery warnings should be addressed promptly to avoid potential problems with system operations which may arise. 1015 0 obj <>/Encrypt 1001 0 R/Filter/FlateDecode/ID[<493E40FFCF1D3F747B74E48D03207C10>]/Index[1000 51]/Info 999 0 R/Length 93/Prev 198552/Root 1002 0 R/Size 1051/Type/XRef/W[1 3 1]>>stream I will say that it came packaged correctly and it functions as designed, would buy again. Authorization number, send defective units postage prepaid to: System Sensor, Repair This item: System Sensor 2W-B i3 Series 2-wire, Photoelectric i3 Smoke Detector $52.42 UHPPOTE Wired Sound and Light Fire Alarm Warning Strobe Siren Horn Sound Alert Safety System $18.40 Fire Lite Alarms Dual Action Pull Station w Key Lock $57.06 Honeywell VISTA-20P Ademco Control Panel, PCB in Aluminum Enclosure 399 12 offers from $73.62 Diameter (including base): (Figure 5). MFR PART # 2W-B SYSTEM SENSOR | 2W-B i3 Series Detector, 2-wire, 12/24 V DC, with Base MFR PART # 2W-B PART # 674092 Spec Sheet Email Print Minimum 1 Each In Stock Details References Shipping Description Installation ease. Table 2: Power-up Sequence for LED Status Indication* In order for this feature to work properly, the chamber must never be opened while power is applied to the smoke detector. Please read thoroughly System Sensor manual A05-1003, Applications Guide for System Smoke Detectors, which provides, detailed information on detector spacing, placement, zoning, wir-, ing, and special applications. Dimensions: 2.0" (51mm) H x 5.3" (127mm) Dia. Follow the steps in the Tech Bulletin below to check your current firmware version and update your device firmware if needed.. System Sensor's AV notification devices are one of the most versatile, easy to install, and cohesive audible visual (AV) notification appliances in the industry. The mounting base installation is further simplified by the incorporation of features compatible with drywall fasteners. 2W-B Datasheet (PDF) - Systemsensor advanced ideas. PDF Selectable-Output Horns, Strobes, and Horn Strobes detector counterclockwise. 32 Degrees to 120 Degrees F. Battery Backup. 9H2u*A^Xob`bd`SD+0 vEw As long as they operate at 12 Volts DC, they should work. accept any interference received, including interference that may cause undesired operation. System Sensor two-wire smoke detectors are marked with a compatibility identifier located on the label on the back of the product. before performing maintenance of any kind. Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. 2), and then install the detector. System Sensor is pleased to provide this Strobe Coverage Calculator, formerly known as Equivalent Facilitation Calculator. Test i3 Series detectors as follows: Power must be removed from the detector 20 mA 12 Volt Systems The LED indication must not be used in lieu of the tests specified under Testing. NIB!! 0.1 I've seen three different mri rooms using system sensor 2wb smokes tied to a zone module. . The System Sensor 2W-B is a 2-wire smoke detector and a member of System Sensor's i3 Series of photoelectric smoke detectors. Direct mount or to ceiling using drywall fasteners (Figure 2). i3 series (4 pages), I3 series. has been momentarily interrupted. testing. The conductors used to connect smoke detectors to the alarm control panel and accessory devices should be color-coded to reduce the likelihood of wiring errors. System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire In Stock Other products from System Sensor System Sensor P4W-P Horn Strobe, White, Wall Mount, Four-Wire System Sensor PC2W Horn Strobe, White, Ceiling Mount, Two-Wire, FIRE Lettering System Sensor B210LP Detector Base, Plug-In The screw terminals in the mounting base will accept 1422 gauge wire. Table 2: Power-up Sequence for LED Status Indication*, (if excessive electrical noise is present), *Refer to Electrical Specifications for start-up time in conjunction with panel alarm, NOTE: If, during power-up, the detector determines there is, excessive electrical noise in the system such as those caused by, improper grounding of the system or the conduit, both LEDs will, blink for up to 4 minutes before displaying detector status (see, After power-up has completed and the detector is functioning, normally within its listed sensitivity range, the green LED blinks, once every five seconds. Lets you hear all the different audio tones of the AV notification appliances, such as the temporal 3 and non-temporal for the electromechanical, 3.1KHz, 520Hz, as well as the chimes. Do NOT Install Detectors in the Following Areas: Start-up Time: Blink 10 sec (See Figure 4.). View a list of all System Sensor locations worldwide. 4W-B and 4WT-B are 4-wire photoelectric smoke detectors. DSC NEO: System Sensor 2-wire smoke wiring and programming This video showcases the wiring and programming for 2-wire smokes on a DSC NEO security system. for the detector to stabilize before testing. unit. Max. 2W-B - SYSTEM SENSOR - i3 Series Detector, | Anixter Initial LED Status Indication. . Two-wire If the detector is within the listed sensitivity limits, the detectors red Just fill out the form and click your area of interest. System Sensor 2W-B, 2WT-B, 4W-B & 4WT-B - Alarm Grid away from the detector. I recommend powering down the system and placing your system on test mode if monitored before swapping in the new smoke. A05-0395-007 4/09 #2132 SpectrAlert Advance Dimensions Model Description Wall Horn Strobes P2R* 2-Wire Horn Strobe, Standard cd, Red All wiring must be installed in compliance with the National Electrical Code, applicable state and local codes, and any special requirements of the local Authority Having Jurisdiction. Please read thoroughly System Sensor manual A05-1003, Applications Guide Also known as: 2WTAB, BK-2WTAB. The i3 Series 2W-B uses drift compensation technology and smoothing algorithms which prevent the smoke detector from becoming too sensitive as dust accumulates. However, you can also use the 2W-B smoke detector with other alarm control panels, but you should verify compatibility with the manufacturer of the alarm control panel first. particles from entering the detector. C. Direct Heat Method (models 2WT-B and 4WT-B only) When the detector is in the alarm mode, the red LED latches on. System Sensor two-wire smoke detectors are marked with a compatibility identifier located on the label on the back of the product. Unfortunately we do not support fire panels like the 32FB. Amazon.com: System Sensor 2w-b All models incorporate a state-of-the-art optical sensing chamber and an advanced microprocessor. 15 sec This includes cleaning, maintenance or screen replacement. System Sensor 2W-B Product Specifications: System Sensor 2W-B Product Compatibility: Plug-in detector line, mounting base included, Mounts to octagonal and single-gang back boxes, 4-square back boxes, or direct to ceiling, Drift compensation and smoothing algorithms. 1o)!2'1hg'0?,s1e*F 6S(Ft50 AKTX"897cOF 7 Each zone provides enough stand by current (2ma) to power up to sixteen smoke detectors. Tools & Software | System Sensor | Honeywell At a minimum, cleaning, Models 2W-B and 2WT-B are 2-wire photoelectric smoke detec-, tors; models 4W-B and 4WT-B are 4-wire photoelectric smoke, detectors. To test this please remove AC power and set the panel into alarm mode to see if the battery will support the system and report back. reasonable protection against harmful interference in a residential installation. To remove the detector from the base once it has been made tamper resistant, use a small screwdriver to depress the square tamper release tab, located on the skirt of the mounting base, and turn the detector counterclockwise. Each i3 Series detector is supplied with a mounting base that can be mounted: 2.To a 312-inch or 4-inch octagonal box, or, 3.To a 4-inch square box with a plaster ring, or. Once the mounting base is installed, the 2W-B smoke detector attaches to the base by simply inserting the head and turning it clockwise until it locks in place. Place control panel or module in EZ Walk Test mode (refer to panel manufacturers manual or 2W-MOD manual D500-46-00). Deciding Whether to Use 2-Wire or 4-Wire Smoke Detectors. Two-wire models must be used with compatible UL Listed panels only. This is because fire alarm control panels vary by has been made tamper resistant, use a small screwdriver to depress the square 35 35 Volts haha, Hi Dustin, Compatible with SENS-RDR sensitivity tester; Full agency compliance with UL 268 and UL 2075; Technical Specifications: System Voltage: 12/24 VDC; Locking Pin. And today we're going to be adding two-wire smokes to our DSC Neo system. The microprocessor, allows the detector to automatically adjust its sensitivity back, to the factory setting when it becomes more sensitive due to, contaminants settling in its chamber. *Refer to Electrical Specifications for start-up time in conjunction with panel NOTICE: This manual shall be left with the owner/user of this equipment. NOTE: If, during power-up, the detector determines there is excessive electrical noise in the system such as those caused by improper grounding of the Reinstall the detector and test. What's the Best Place to Install a Smoke Detector. current list of detectors and UL Listed compatible control units. - 2W- B More results Similar Description - 2W-B More results Wiring Diagrams $5899 $69.99. Should it become necessary, the screen/sensing chamber is field replaceable. When the detector is in the, alarm mode, the red LED latches on. Initial LEDStatus Indication Do you see that white unit anywhere in or near your 20P alarm panel? AT AN ANGLE ON THE NIB!! System Sensor makes no other express warranty for this smoke detecbe obligated to repair or replace units which are found to be defective because of damage, System Sensor 2451 A Photo B401B / B406B / DH-400 / B110LP / B116LP A 120 System Sensor 2451TH A Photo / Therm. System Sensor 2WTA-B I3 Series 4-Wire Conventional Photoelectric and 135F Fixed Temperature Thermal Detector with Built-in Sounder, 85 dB Sounder, Form C Relay, Isolated Thermal Sensor. However zones 1 and 2 can support 16 on each zone. which provides detailed information on detector spacing, placement, zoning, wiring, and special applications. (135F) thermal detector and are also capable of sensing a freeze condition if System Voltage Nominal: The 2W-B is a 2-wire, photoelectric i3 smoke detector. We're here to help with any issues or questions. The calculator was programmed to assist you in the design of audible/visible notification device circuits. (See Figure 6.) When using the System Sensor 2W-B two wire smoke detector with a VISTA-20P or VISTA-21iP alarm control panel, you should wire the smoke detector to zone one. System Sensor BK-2WB Photoelectric i3 Series Smoke Detector, 2-Wire, White Brand: System Sensor ADI #:BK-2WB Model #: 2W-B Name: System Sensor BK-2WB Photoelectric i3 Series Smoke Detector, 2-Wire, White Plug-in detector line, mounting base included Large wire entry port In-line terminals with SEMS screws Product Overview Installation ease. Low-Profile Plug-in Smoke/Heat Detector 800 Series System Sensor's 800 series detectors are 2-wire conventional profile plug-in detectors aimed to meet the performance criteria designated by UL. After power-up has completed and the detector is functioning normally within its listed sensitivity range, the green LED blinks once every five seconds. Therefore, System Sensor recommends 1. Unlike traditional detection systems, Reflected Beam Smoke Detectors were designed for spacious rooms, open areas, and high ceilings; their innovative features make them popular choices for spaces like warehouses, atriums, arenas, and churches. Explore System Sensor products including: AV Notification, Beam Smoke detection, CO detection, HVAC Smoke detection, spot smoke detection, relays, & modules. PDF 2023 - lupine.de Using a 1000-1500 watt hair dryer, direct the heat toward either of the thermistors. NFPA 72 requirements. detector is in need of maintenance because its sensitivity has shifted outside from the mounting base without the use of a tool. Max. System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire, System Sensor P4W-P Horn Strobe, White, Wall Mount, Four-Wire, System Sensor PC2W Horn Strobe, White, Ceiling Mount, Two-Wire, FIRE Lettering, System Sensor B210LP Detector Base, Plug-In, System Sensor 2151 Photoelectronic Low-Profile Plug-In Detector for Special Applications, System Sensor SCWL Strobe, Ceiling Mount, FIRE, White, Clear Lens, System Sensor EOLR-1 End-of-Line Epoxy Encapsulated Relay, SPST, Plug-in detector line, mounting base included, Mounts to octagonal and single-gang back boxes, 4-square back boxes, or direct to ceiling, Drift compensation and smoothing algorithms. NOTE: Before performing maintenance on the detector, notify the proper authorities that maintenance is being performed and the system will be temporarily out of service. 0.18 MAX. FREE delivery Mar 8 - 10. We are notifying you about EASE Evac as a service to our customers as it may simplify voice evacuation design. 12/24 PDF inSTaLLaTion and mainTenanCe inSTruCTionS Series The Please refer to insert for the Limitations of Fire Alarm Systems Amazon.com: System Sensor 2wb are capable of generating a maintenance needed signal. the removal of detectors before beginning construction or other dust producing activity. In or near areas where particles of combustion are normally present such as kitchens; in garages (vehicle exhaust); near furnaces, hot water heaters, or gas space heaters. list is available from System Sensor upon request. System Sensors intelligent and conventional modules are designed to help you meet a wide range of application requirements. No. Will these cover up a low voltage mudring? A copy of this list is available from System Sensor upon request. When mounting the i3 Series, ensure that the head is mounted to the correct base. Installation of the 2W-B, 2WT-B, 4W-B, and 4WT-B detectors is simplified by Hold the heat source about 12 inches from the detector to avoid damage 0.3 4.Direct mount or to ceiling using drywall fasteners (Figure 2). Wd]_c'F1p% Freeze Trouble \kUb5{,P'Zwd**4C8X)z Enter a zip code, select a range, and choose a Distributor type to locate the nearest Distributor. I have a DSC alarm system that my current System Sensors are connected to and would I need to do anything special when I replace the old with the new other then reset the system? detector to finish the power-up cycle (see Table 2). 7.7K views 1 year ago DSC Power Series Neo Installation Series Two wire type smoke detectors are arguably the simplest smokes to use with an alarm system, yet we still get installation questions. To view our listings, please visit one of the following sites. (See the Testing section.) See how you can simplify specification, configuration, and installation of your notification project - saving time and money in the process. Operating Temperature Range: 50 A average Wire connections are made by stripping approximately 14-inch of insulation from the end of the feed wire, inserting it into the proper base terminal, and tightening the screw to secure the wire in place. Green LED indicator on the base. Vacuum or use canned air to remove any dust or particles that are present on both chamber halves. electrical wiring. System Sensor 2WT-B - 2-Wire Smoke Detector with Fixed Heat Sensor When used with an i3 Series compatible control panel or the i3 Series 2WMOD module (refer to installation manual D500-46-00), the 2W-B and 2WT-B PDF System Sensor L-series indoor horn/strobes However, there is no guarantee that interference will not occur in a particular installation. 30 heads and bases are clearly identified as either 2-wire or 4-wire. 2. I have since replaced the battery, which has resolved the smoke error. F Standby Current: The i3 line redefines installation ease with its plug-in design. D initiating circuits require the use of a 2W-MOD for models 2W-B and 2WT-B. switch opening; push and hold. They were an easy mount adapted to our smoke detecting system. Consult NFPA 72, the local Authority Having Jurisdiction (AHJ), and/or applicable codes for specific information regarding the spacing and placement Reorient or relocate the receiving antenna. 1-800-SENSOR2, FAX: 630-377-6495 2. They also answer your questions from the comfort of home or the office. System Sensor two-wire smoke detectors are marked with a compatibility Comment When low beam is activated, it's possible to change into high beam by pushing the wire remote. No. detector to be easily installed or removed. For two-wire models 2W-B and 2WT-B, connect detectors only to compatible alarm control panels as identified by System Sensors compatibility chart. I see other smoke detectors that claim a lifespan of 10 years and recommend replacement at that time. : The heads and bases are clearly identified as either 2-wire or 4-wire. This chart contains the current list of detectors and UL Listed compatible control units. system or the conduit, both LEDs will blink for up to 4 minutes before displaying detector status (see Table 2). 3. Turn it on by pushing the button of the wired remote. System Sensor two-wire smoke detectors are marked with a compatibility identifier located on the label on the back of the product. For two-wire models 2W-B and 2WT-B, connect detectors only to compatible alarm control panels as identified by System Sensor's compatibility chart. The System Sensor 2WTA-B is a 2-wire smoke and fixed heat sensor with a built-in sounder. Explore System Sensor like white papers, announcements, technical bulletins, case studies, and more. System Sensor offers world-class fire detection and notification solutions. All i3 Series detectors are designed to provide open area protection. endstream endobj 473 0 obj <> endobj 474 0 obj <> endobj 475 0 obj <> endobj 476 0 obj <> endobj 477 0 obj <> endobj 478 0 obj <>stream System Sensors AV notification devices are the most versatile, easy to install, and cohesive line of audible visual (AV) notification appliances in the industry. *Refer to Electrical Specifications for start-up time in conjunction with panel alarm verification. In dusty, dirty, or insect-infested areas. InnovairFlex duct smoke detectors combine an impressive collection of innovations to greatly simplify HVAC system monitoring. System Sensor 2W-B User Manual Models 2WT-B, and 4WT-B also feature a restorable, built-in, fixed temperature, (135F) thermal detector and are also capable of sensing a freeze. To engage the tamper-resistant feature, cut the small plastic tab located on the mounting base (Figure 2), and then install the detector. Models 2WT-B and 4WT-B also feature a restorable, built-in, fixed temperature (135F) thermal detector and are also capable of sensing a freeze condition if the temperature is below 41F. : and it should be cleaned as outlined in the Maintenance section. List Price $134.00 Our Price $88.99 You Save $45.01 (34%) System Sensor web site at www.systemsensor.com. Smoke detectors are not to be used with detector guards unless the combination has been evaluated and found suitable for that purpose. Alarm Type. Max. system sensor.com is the site link for a current list of all UL listed compatible smoke detectors. to a 2-wire base, and a 4-wire head will only mount to a 4-wire base. OVAL AREA OR AT THE This device complies with part 15 of the FCC Rules. Features include a universal mounting plate with a preliminary snap-in feature to hold the product in place for the screw attachment, 7 field-selectable candela settings for wall and ceiling mount devices, and rotary switches to select horn tone and volume settings. A copy of this To view this information, simply choose a manufacturer and the appropriate model. exclusion or limitation of incidental or consequential damages, so the above limitation Cross-Reference: AV L-Series to SpectrAlert Advanced, Cross-Reference: Base/OEM Detector Compatibility, DOWNLOAD STROBE COVERAGE CALCULATION EXAMPLES AVFL220, DOWNLOAD CTA System Sensor Speaker GLL Files, DOWNLOAD SS BASE DETECTOR CROSS-REFERENCE, DOWNLOAD SS BASE DETECTOR CROSS-REFERENCE LEGACY. SMOKE be used in lieu of the tests specified under Testing. System Sensor is not selling, supporting or endorsing AFMGs EASE Evac voice evacuation software. 2. System Sensor products are designed and manufactured to meet or exceed various product safety and certification requirements. IMPORTANT: This detector must be tested and maintained regularly following NFPA 72 requirements. Table 3: EZ Walk Test Detector Modes 5. Copies of this item 6 System Sensor 2W-B i3 Series 2-wire, Photoelectric Smoke Detector. PipeIQ is the free all-in-one system design, configuration, and monitoring software for the System Sensor FAAST line of aspirating smoke detectors, including the new FAAST XT. Press Direct mount or to ceiling using drywall fasteners (Figure 2). Two-Wire Compatibility and workmanship under normal use and service for a period of three years from date 2W-B and 2WT-B, connect detectors only to compatible alarm control panels as identified by System Sensor's compatibility chart. Connectivity. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used The System Sensor 2WT-B is a 2-wire smoke and heat detector. indicate a need for cleaning, replacement, or a fr eeze condition (2WT -B only) at the control panel or module. HOTFire is a free online site that helps users quickly plan and model notification appliance circuits (NACs) using the entire line of SpectrAlert Advance and L-Series. Some parts of this page is temporarily unavailable. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.