Bosch D250a User manual

Fire Alarm Systems | D250A Two‑wire Detector Base (12/24 VDC)
D250A Two‑wire Detector Base
(12/24 VDC)
www.boschsecurity.com
u12 VDC or 24 VDC operation
uTwo‑wire circuit compatibility
uCan be used in circuit controlled by D291M
addressable base
uLow‑profile six‑inch diameter base accepts
interchangeable detector heads
uEasy head removal for cleaning and servicing
The D250A is a two‑wire, 12 VDC or 24 VDC detector
base without an alarm LED. It accepts Bosch D254 and
D255 heat detector heads. Use the detector base with
either of these heat detector heads in circuits where
specifications call for fixed‑temperature heat
detectors. You can also use this detector base with the
Bosch D256A Rate‑of‑Rise and Fixed‑temperature
(+135°F [+57°C]) Heat Detector and D257A
Rate‑of‑Rise and Fixed‑temperature (+190°F [+88°C])
Heat Detector.
The detector base also operates in a circuit controlled
by the Bosch D291M Addressable Smoke Detector. In
this circuit configuration, the D291M Addressable
Detector Base controls a supervised 24 VDC circuit
containing up to 19 detector bases that accept any
D291M listed head. In this case, the detector base is
not limited to heat detection heads.
Notice
For more information on using the detector base
with the D291M, see the D291M Installation
Instructions.
Certifications and approvals
Region Certification
USA UL UROX: Smoke - Automatic Fire Detectors
(ANSI\UL 268)
CSFM see our website
Installation/configuration notes
Compatible Products
The following products are compatible with the D250A
Two‑wire or Four‑wire Detector Base:
Category Product ID Product Description
Control
Panels
D7022 Conventional FACP
D7024 Conventional FACP
D7024 Addressable FACP
D7212 Addressable control panel
D7212G Addressable control panel
D7412G Addressable control panel
D9112 Addressable control panel

D9412G Addressable control panel
D9124 Addressable FACP
Detector
Bases
D291M Addressable multiple detector base
Detector
Heads
D254A Fixed temperature heat detector
(+135°F [+57°C])
D256A Rate‑of‑Rise and fixed temperature heat
detector (+135°F [+57°C])
D257A Rate‑of‑Rise and fixed temperature heat
detector (+190°F [+88°C])
D281A* Ionization smoke detector head
D282A* Photoelectric smoke detector head
D283A* Photoelectric smoke detector head with
fixed temperature (+135°F [+57°C])
heat sensor
* When used in a circuit with a D291M multiple
detector base, the D250A accepts these detector
heads listed for use with the D291M.
Mounting
The detector base fits on standard three‑inch
octagonal and four‑inch square and octagonal back
boxes.
Wiring
Wiring connections are accessible with the base
mounted to the back box.
Parts included
Quant. Component
1D250A detector base
1 Hardware pack
1 Literature pack
Technical specifications
Electrical
Current (operating): Depends on detector head; refer to pertinent
detector head specification
Voltage (operating): 8.0 VDC to 36.3 VDC
Environmental
Temperature
(operating):
+32°F to +100°F (0°C to +38°C)
Mechanical
Color: Bone white
Dimensions
(diameter):
6 in. (15.2 cm)
Ordering information
D250A Two‑wire Detector Base (12/24 VDC)
Accepts Bosch D254 and D255 heat detector heads
Order number D250A
2 | D250A Two‑wire Detector Base (12/24 VDC)

3 | D250A Two‑wire Detector Base (12/24 VDC)
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: [phone]
Fax: [phone]
[email protected]
www.boschsecurity.us
Bosch Security Systems B.V.
P.O. Box 80002
5617 BA Eindhoven, The Netherlands
Phone: + 31 40 2577 284
Fax: [phone]
[email protected]
www.boschsecurity.com
Robert Bosch (SEA) Pte Ltd, Security
Systems
11 Bishan Street 21
Singapore 573943
Phone: [phone]
Fax: [phone]
[email protected]
www.boschsecurity.asia
Bosch (Shanghai) Security Systems Ltd.
201 Building, No. 333 Fuquan Road
North IBP
Changning District, Shanghai
200335 China
Phone [phone]
Fax: [phone]
www.boschsecurity.com.cn
Robert Bosch Ltda Security Systems Division
Via Anhanguera, Km 98
CEP 13065-900
Campinas, Sao Paulo, Brazil
Phone: [phone]
Fax: [phone]
[email protected]
www.boschsecurity.com
© Bosch Security Systems 2014 | Data subject to change without notice
2707042827 | en, V2, 06. Aug 2014