Bosch D250A User Manual
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.
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.
octagonal and four‑inch square and octagonal back
boxes.
Wiring
Wiring connections are accessible with the base
mounted to the back box.
mounted to the back box.
Parts included
Quant.
Component
1
D250A 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
Accepts Bosch D254 and D255 heat detector heads
Order number
D250A
2 | D250A Two‑wire Detector Base (12/24 VDC)