Skip to content Skip to navigation

Bosch Security and Safety Systems North America

Search
Icon close
Product Variants
Product Families
More Content
PRODUCT FAMILY

D340 Family two‑wire duct smoke detector housings

[{"images":[{"format":"300Wx300H","url":"https://resources-boschsecurity-cdn.azureedge.net/public/images/large/ProductPhoto_Web_all_18014401217032843.png","srcsetWidth":300,"isVideo":false}],"thumbnails":[{"format":"96Wx96H","url":"https://resources-boschsecurity-cdn.azureedge.net/public/images/small/ProductPhoto_Web_all_18014401217032843.png","srcsetWidth":96,"isVideo":false}],"zooms":[{"format":"515Wx515H","url":"https://resources-boschsecurity-cdn.azureedge.net/public/images/ProductPhoto_Web_all_18014401217032843.png","srcsetWidth":515,"isVideo":false}]}]
Close Modal
  • For 1 ft. (30.5 cm) to 10 ft. (3 m) ducts with air velocity between 300 ft./min. to 4000 ft./min. (1.52 m/s to 20.3 m/s)
  • Easy duct tube installation through the housing cuts installation time
  • Detector test and reset without removing covers
  • Clear cover allows quick visual inspection
  • Tube filters, dust immune smoke detector, and easy disassembly for cleaning reduce maintenance time and cost

Product Variants

D340 Family two‑wire duct smoke detector housings

Duct detector housing, 2-wire

Commercial Type No. D340
Product No. 4.998.113.252

D340 Family two‑wire duct smoke detector housings

Duct detector kit, 2-wire

Commercial Type No. D340P
Product No. 4.998.137.956

Technical Specification

Key Specifications

Current (alarm) Dependent on the control panel that must limit the alarm current to 100 mA maximum.
Current (standby) 0.12  mA maximum
Maximum RMS Ripple 25% of DC input
Power-up time 22 sec maximum
Voltage, operating 8.5 VDC to 32 VDC from two-wire loop. Optional 24 VDC/VAC from control panel or external supply.
Loop power External power
8.5 V to 32 V 24 V
Alarm < 0.120 mA, 5 mA
Standby < 0.170 mA, 0.030 mA
Trouble Current limit to 100 mA, 170 mA in remote test
Loop power 8.5 V to 32 V
Alarm < 0.140 mA
Standby < 0.170 mA
Trouble Current limit to 100 mA
Loop power 8.5 V to 32 V
Alarm < 0.130 mA
Standby < 0.150 mA
Trouble Current limit to 100 mA
Air velocity 300 ft./min to 4000 ft./min (1.5 m/s to 20.3 m/s)
Relative humidity 0% to 95%, non-condensing
Accessories

Duct smoke head, 2-/4-wire, 12/24V

Commercial Type No. D285DH
Product No. 4.998.140.344

Detects the large smoke particles which typically result from wood, paper, and fabric combustion

Remote indicator plate

Commercial Type No. D344-RL
Product No. 4.998.140.354

Used with the D340 Series Duct Smoke Detector Housings

Remote test/indicator plate, 24V

Commercial Type No. D344-RT
Product No. F.01U.024.868

Use with a D340/D341/D342 or D343 (legacy product) Duct smoke housing or D296/D297 Long‑range beam smoke detector.

Sample tube, duct 1.5'/45.7cm

Commercial Type No. D344-1.5
Product No. F.01U.029.219

length 45.7 cm (1.5 ft)

Sample tube, duct 3'/91.4cm

Commercial Type No. D344-3
Product No. F.01U.029.175

length 91.4 cm (3 ft)

Sample tube, duct 5'/152cm

Commercial Type No. D344-5
Product No. F.01U.029.174

length 1.52 m (5 ft)

Duct tube filters, 20pcs

Commercial Type No. D344-TF
Product No. 4.998.137.961

Replaceable filters for duct detector sampling tubes, available in packages of 20

Relay module, form C, 10A 12/24V

Commercial Type No. PAM-4
Product No. F.01U.135.043

One set of 10.0 A, Form C contacts that can be energized across a range from 9 VDC to 40 VDC

Downloads

Title Type Language
Title
CSFM
Type
PDF
 Language
fi-FI  ky-KG  uk-UA  en-US  hr-HR  lv-LV  lt-LT  sl-SI  zh-CN  el-GR  sr-Latn-RS  nl-NL  bg-BG  hy-AM  he-IL  cs-CZ  mk-MK  ja-JP  ar-SA  tg-Cyrl-TJ  de-DE  hu-HU  zh-TW  ko-KR  pt-BR  sk-SK  es-ES  kk-KZ  nn-NO  it-IT  pl-PL  ru-RU  pt-PT  sq-AL  es-AR  ro-RO  sv-SE  id-ID  da-DK  et-EE  tr-TR  fr-FR  vi-VN  th-TH 
Title
HKFSD
Type
PDF
 Language
en-US 
Title
Datasheet
Type
PDF
 Language
en-US  pt-BR  es-ES 
Title
Installation manual
Type
PDF
 Language
en-US 
Title
Technical bulletin (Two-Wire Compatibility)
Type
PDF
 Language
en-US 
forward-right_adjusted