Bosch D371B, D371C Specsheet

Fire Alarm Systems | D371 Family Floor‑mount Door Holders
D371 Family Floor‑mount Door Holders
www.boschsecurity.com
u Attractive design, sturdy cast construction with
brass (B) or metallic powder‑coat (C) finish
u 24 VAC, 24 VDC, or 120 VAC
terminals
2
) to 22 AWG (ISO 0.34 mm2)
The D371 electromagnetic door holders are rugged die‑cast devices for holding doors. They allow control of doorways in alarm conditions. Typical applications are in stairways or other exit pathways where it is desirable to restrict airflow yet allow free emergency access.
Functions
Power and Holding Force
These door holders accept power from 24 VAC, 24 VDC, or 120 VAC sources. Depending on how they are wired and the amount of current, they can supply from 35 lb to 110 lb of holding force.
Certifications and approvals
Region Certification
USA UL SZNT: Releasing Devices, Ordinary Loca-
tions (UL864)
CSFM see our website
Hong Kong HKFSD
u Holding force between 35 lb and 110 lb
u A variety of available extension rods allow mounting
in difficult locations
Installation/configuration notes
Mounting Considerations
These door holders are floor‑mounted units, complete with back box and bracket and all fasteners needed for standard installation. Extension rods are available in lengths from 1 in. (2.5 cm) to 4 in. (10 cm) to allow installation in applications where the door does not swing to within 3 in. (7.5 cm) of the back box.
Wiring Considerations
Wire the D371B (brass) and D371C (metallic powder‑coat) door holders through knockouts in the bottom or the sides of the back boxes. The D371 back box also has knockouts for conduit installation other than from the bottom. The terminals accept wires from 12 AWG to 22 AWG (ISO 4 mm2 to 0.34 mm2).
Parts included
Quant. Component
1 Back box bracket
1 Door magnet
1 Catch plate
2 | D371 Family Floor‑mount Door Holders
1 Nut plate
1 Mounting template
2 Drill bits
2 Black plastic caps
1 Hardware pack
1 Literature pack
Technical specifications
Electrical
Current Draw (24 V installations)
24 VAC: 19 mA
24 VDC: 20 mA
Current Draw (120 V installations)
Common and High Voltage Terminals:
Common and Low Voltage Terminals:
Voltage (supply): 24 VAC, 24 VDC, or 120 VAC
20 mA
100 mA
Environmental
Relative Humidity: Up to 95%, non‑condensing
Temperature (operating): +32°F to +120°F (0°C to +49°C)
Mechanical
Dimensions
Catch Plate (diameter x depth)1: 2.25 in. x 2.25 in.
Electromagnet (H x W x D)2: 2.75 in. x 4.625 in. x 2 in.
Floor Bracket (H x W x D): 3.875 in. x 4.75 in. x 2.75 in.
D372 Back Box (H x W x D): 2.75 in. x 4.75 in. x 1.5 in.
1
The diameter of the magnet plate is 1.75 in. (4.4 cm).
2
The electromagnet component extends 0.875 in
(5.7 cm x 5.7 cm)
(7 cm x 11.7 cm x 5.1 cm)
(9.8 cm x 12.1 cm x 7 cm)
(7 cm x 12.1 cm x 3.8 cm)
(2.2 cm) from the mounting surface when surface mounted. It extends 1.125 in. (2.9 cm) into the back box.
Ordering information
D371B Floor‑Mount Door Holder with Brass Finish
Door holder with brass finish accepts power from 24 VAC, 24 VDC, or 120 VAC sources and, depending on wiring and current, can supply from 35 lb to 110 lb of holding force
Order number D371B
D371C Floor‑Mount Door Holder with Metallic Pow­der‑coat Finish
Door holder with metallic powder‑coat finish accepts power from 24 VAC, 24 VDC, or 120 VAC sources and, depending on wiring and current, can supply from 35 lb to 110 lb of holding force
Order number D371C
D373B Extension Rod (brass, 2.5 cm [1 in.])
2.5 cm (1 in.) extension rod with brass finish; package of five
Order number D373B
D373C Extension Rod (metallic powder‑coat, 2.5 cm [1 in.])
2.5 cm (1 in.) extension rod with metallic powder‑coat finish; package of five
Order number D373C
D374B Extension Rod (brass, 3.8 cm [1.5 in.])
3.8 cm (1.5 in.) extension rod with brass finish; package of five
Order number D374B
D374C Extension Rod (metallic powder‑coat, 3.8 cm [1.5 in.])
3.8 cm (1.5 in.) extension rod with metalliic powder‑coat finish.; package of five
Order number D374C
D375B Extension Rod (brass, 5.1 cm [2 in.])
5.1 cm (2 in.) extension rod with brass finish; package of five
Order number D375B
D375C Extension Rod (metallic powder‑coat, 5.1 cm [2 in.])
5.1 cm (2 in.) extension rod with metallic powder‑coat finish; package of five
Order number D375C
D376B Extension Rod (brass, 7.6 cm [3 in.])
7.6 cm (3 in.) extension rod with brass finish; package of five
Order number D376B
D376C Extension Rod (metallic powder‑coat, 7.6 cm [3 in.])
7.6 cm (3 in.) extension rod with metallic powder‑coat finish; package of five
Order number D376C
D377B Extension Rod (brass, 10.2 cm [4 in.])
10.2 cm (4 in.) extension rod with brass finish; package of five
Order number D377B
D377C Extension Rod (metallic powder‑coat, 10.2 cm [4 in.])
10.2 cm (4 in.) extension rod with metallic powder‑coat finish; package of five
Order number D377C
3 | D371 Family Floor‑mount Door Holders
Represented by:
Americas: Europe, Middle East, Africa: Asia-Pacific: China: America Latina:
Bosch Security Systems, Inc. 130 Perinton Parkway Fairport, New York, 14450, USA Phone: +1 800 289 0096 Fax: +1 585 223 9180 security.sales@us.bosch.com www.boschsecurity.us
Bosch Security Systems B.V. P.O. Box 80002 5617 BA Eindhoven, The Netherlands Phone: + 31 40 2577 284 Fax: +31 40 2577 330 emea.securitysystems@bosch.com www.boschsecurity.com
Robert Bosch (SEA) Pte Ltd, Security Systems 11 Bishan Street 21 Singapore 573943 Phone: +65 6571 2808 Fax: +65 6571 2699 apr.securitysystems@bosch.com www.boschsecurity.asia
Bosch (Shanghai) Security Systems Ltd. 201 Building, No. 333 Fuquan Road North IBP Changning District, Shanghai 200335 China Phone +86 21 22181111 Fax: +86 21 22182398 www.boschsecurity.com.cn
Robert Bosch Ltda Security Systems Division Via Anhanguera, Km 98 CEP 13065-900 Campinas, Sao Paulo, Brazil Phone: +55 19 2103 2860 Fax: +55 19 2103 2862 latam.boschsecurity@bosch.com www.boschsecurity.com
© Bosch Security Systems 2014 | Data subject to change without notice 2737234571 | en, V3, 05. Sep 2014
D378 Extension Rod Wrench Kit
Wrench kit for installing extension rods and door holders
Order number D378
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