| 尺寸 | Sensor (2551HR): Photoelectronic |
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| Height: | 3.2″ (8.1 cm), detector in base (scattering principle) (add .5″ [1.27 cm] for thermal) Thermal Sensor |
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| Diameter: | 4.0″ (10.2 cm) installed in (2551THR): 135° F fixed temperature alarm |
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| B501 base | Smoke Detector Spacing: 6.1″ (15.5 cm) installed in On smooth ceilings (as defined in NFPA 72) spacing of |
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| B501B base | 30 feet (900 sq. ft.) may be used as a guide. See NFPA |
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| Shipping Weight: | 9.6 ounces (272 g) 72 for more details on spacing requirements. 2551HR: 32° to 120° F (0° to 49° C) 2551THR: 32° to 100° F (0° to 38° C) |
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| Humidity Range: | 10% to 93% RH noncondensing |
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| Air Velocity Rating: | 3,000 fpm |
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| Operating Voltage: | 15–32 VDC peak, 6.5 mA APPROVED current for visible LEDs latched on |
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| Standby Current: | 230 µA MSFM |
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| © System Sensor 4/97 | This document is not intended to be used for installation purposes. A05-228-01 The 2551THR Intelligent Photoelectronic Sensor adds a |
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| temperature of 135° F. | 4″ base |
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| installed in B501B base | Sensor: Unipolar, dual chamber |
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| Temperature Range: | 32° to 120° F (0° to 49° C) On smooth ceilings (as defined in NFPA 72) spacing of |
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| Page 2 | A05-228-01 The 5551R Intelligent Thermal Sensor will alarm at |
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| increases. | 5551R with 6″ base |
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| installed in B501 base | Sensor: Electronic, dual thermistors 6.1″ (15.5 cm) Thermal Sensor Spacing: |
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| + | - Break wire run to provide supervision of connections. U.L. LISTED COMPATIBLE CONTROL PANEL 3 2 3 2 3 2 1 1 1 |
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| - | CLASS A OPTIONAL WIRING 500 Series Base Wiring Diagram |
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| Page 3 | A05-228-01 |
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| Single | 31/2″ 4″ 4″ 50 60 70 75 |
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| Gang | Oct. Oct. Sq. mm mm mm mm |
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| B501 | Yes No No No Yes Yes Yes No |
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| B501B | Yes Yes Yes Yes No No No No |
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| B524RB | No Yes Yes Yes No Yes Yes Yes |
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| B524BI | No Yes Yes Yes No No Yes Yes |
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| B501BH | No No No Yes No No No No |
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| Part No. | Description Accessories |
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| UL | ULC MOD400R Field Sensitivity Test Tool |
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| Head | SMK400 Surface Mounting Kit for Flangeless Base |
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| Sensor with Thermal, Plug-in Head | RMK400 Recessed Mounting Kit for Flangeless Base |
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| Temperature (135° F), Plug-in Head | SMB500 Surface Mount Box for 500 Series Modules |
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| of-Rise Thermal Sensor, Plug-in Head | XP-4 Extension Poles for XR5 Detector Removal |
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| M500MB | M500MAB Monitor Module, Interfaces with DUST45 Replacement Dust Cover for 500 Series |
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| Mechanical Contact Devices | Smoke Sensors |
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| M500CH | M500CHA Control Module, Controls Devices Requiring External Power |
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| M500X | M500X Isolator Module, Isolates Groups of Devices Between Two Isolator Modules in the Event of a Short Circuit Across Communication Line |
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| M501M | M501MA Mini-Monitor Module |
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| DH500 | DH500A Intelligent Duct Housing |
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| DH500ACDC | DH500ACDCA Intelligent Duct Housing with Auxiliary Contacts |
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| RA400Z | RA400ZA Remote Annunciator |
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| In Canada: | In the Far East: In Italy: |
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| Telephone: 905-812-0767 | Telephone: 852-2191-9003 Telephone: 39-40-9490-111 |
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| Fax: 905-812-0771 | Fax: 852-2736-6580 Fax: 39-40-382137 |
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| In China: | In India: In the United Kingdom: |
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| Telephone: 852-2191-9003 | Telefax: 91-022-8202564 Telephone: 44-1403-276500 |
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| Fax: 852-2736-6580 | Fax: 44-1403-276501 |
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| Page 4 | A05-228-01 |
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