Edwards (757-3A-RS70) 30 cd re-entrant speaker/strobe – 70v, red. strobe: ul 1971 listed @ 30 cd, inchfire inch wall orientation.

The Edwards 757-3A-RS70 is a 30-candela re-entrant speaker-strobe in red, designed for 70 V fire-alarm audio risers. Specifically, it is part of the Integrity 757 Series, which uses a compression-driver re-entrant speaker for higher output than the cone-type models. As a result, you get a louder voice and tone signal in the same housing footprint.

First, the 757-3A-RS70 carries a compression driver with an 8-ohm voice coil and sealed construction. Then a built-in DC blocking capacitor allows the panel to electrically supervise the audio distribution circuit. Therefore, the speaker is correctly supervised on a standard 70 V audio riser.

Wattage Taps and Sound Output

Furthermore, the 757-3A-RS70 is field-selectable for 2, 4, 8, or 15 watt operation. As a result, the installer can balance output against branch loading without changing devices. In addition, the high-efficiency driver produces a loud 98 dBA at 15 watts in a reverberation room (UL 1480 method).

Specifically, the speaker-strobe dBA output per tap is:

• 2 W — 87 dBA
• 4 W — 90 dBA
• 8 W — 95 dBA (UL 1480 average 91.8 dBA)
• 15 W — 98 dBA (UL 1480 average 94.1 dBA)

UL 1971 and UL 1638 Strobe Ratings

Also, the integrated strobe is UL 1971-listed at 30 cd wall mount and 15 cd ceiling mount. In addition, it is UL 1638-listed at 30 cd as a protective visual signaling appliance. Therefore, the device qualifies for both public-mode life-safety and private-mode protective signaling use cases.

Synchronized Flash

Furthermore, the 757-3A-RS70 synchronizes at one flash per second. As a result, multiple strobes on the same circuit flash together when paired with an external synchronization source. Compatible sync sources include G1M-RM, SIGA-CC1S, SIGA-MCC1S, SIGA-CC2A, SIGA-MCC2A, BPS6A, BPS10A, APS6A, APS10A, and Fireshield Plus 3/5/10-zone panels.

Operating Voltage

Specifically, the speaker accepts 70 VRMS audio. Then the strobe runs on 16 to 33 VDC continuous (not pulsed). In addition, a diode allows full signal-circuit supervision.

Verified Specifications

• Strobe rating (wall): 30 cd (UL 1971)
• Strobe rating (ceiling): 15 cd (UL 1971)
• UL 1638 / ULC S526 rating: 30 cd
• Speaker driver: Re-entrant compression driver, 8-ohm voice coil, sealed construction
• Speaker voltage: 70 VRMS
• Speaker taps: 2, 4, 8, 15 W
• Strobe voltage: 16–33 VDC continuous
• Strobe current: 89 mA @ 24 VDC typical / 130 mA @ 16 VDC RMS UL
• Flash rate: 1 fps synchronized
• Housing: Textured, color-impregnated engineered plastic (exceeds UL 94V-0)
• Color: Red (white version is 757-3A-RS70W)
• Lens: Clear LEXAN; ships with LKW-1 “FIRE” wall-mount markings
• Wire connections: Speaker terminals up to #12 AWG; strobe 6-inch color-coded wire leads
• Operating environment (indoor): -31 to 150°F (-35 to 66°C), 85% RH @ 30°C
• Operating environment (outdoor, w/ 757A-WB): -31 to 150°F (-35 to 66°C), 95% RH @ 60°C
• Listings: UL 1971, UL 1638, UL 1480, ULC S526, ULC S541, MEA, CSFM, FM
• ADA compliant (Code of Federal Regulation Chapter 28 Part 36 Final Rule)

Mounting

Specifically, the 757-3A-RS70 flush-mounts to the Edwards 960A-4SF flush box. Therefore, no separate trim plate is required. Also, surface and weatherproof mounting use Edwards’s color-matched accessory boxes:

• 757A-SB — indoor surface box, red
• 757A-WB — weatherproof outdoor surface box, red
• 757A-BDF — bi-directional mounting frame, red

Lens Markings

However, the unit ships with “FIRE” wall-orientation markings. Therefore, ceiling-mount or alternate-language installations need an LKW or LKC lens kit (e.g., LKC-1 for ceiling “FIRE”, LKW-2 for “FEU”, LKW-3 for bilingual “FIRE/FEU”, LKW-4 for “SMOKE”, LKW-7 for “EMERGENCY”).

Order the Edwards 757-3A-RS70

To order the Edwards 757-3A-RS70, call 1-888-557-0558. Alternatively, email sales@lifesafetycom.com.

For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com