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dFT3
dFT3 Explosion-proof analogue telephone
This product has the following explosion protection:
II 3 G Ex nAnL IIC T5
II 3 D Ex tD A22 IP65 T80 °C
-20 °C ≤ Ta ≤ +55 °C
Zone 2, 22
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dFT3 Explosion-proof analogue telephone

  • Explosion-proof analogue telephone
  • Certified for gas and dust hazardous areas – zone 2, 22
  • Degree of protection IP 65
  • Impact-resistant polycarbonate housing
  • For areas with temporary explosive atmospheres
  • Available with armoured or spiral cord as an option
  • Models with or without display
  • Housing colours red and black
  • Can be used as a desk-mounted or wall-mounted telephone

Especially suitable for

Technical data

Electrical safetyEN 60950
Pulse/pause ratioprogrammable:
1.5:1 60/40 ms
2:1 66.7/33.3 ms
Dialling methodMFV nach CCITTQ 23
Second bellw1, w
Incoming telephone lineTCP/La, TCP/Lb
Bell ringing frequencyprogrammable: 16–68 Hz
Net access, acousticsTBR 21, TBR 38
Flash time~ 80 ms set as default
1 ms–999 ms can be programmed
Transportation/storage temperature-25 °C / +70 °C
Display temperature-10 °C / +55 °C
HousingPolycarbonate black/red
Type of mountingvertical
Cable entry1x M20 x 1.5 cable gland, 1x M20 x 1.5 blind plug, 2x M12 x 1.5 blind plugs
Connection technologysingle wire or multiple wires up to 2.5 mm²
Operating temperature-20 °C / +55 °C
Degree of protectionIP65
ApprovalBVS 09 ATEX E061
Technologyanalogue
Supply voltage24-66 V DC
Weight2,3 kg
Tone ringing volume95 dB
Displayavailable with and without
MouthpieceElectret microphone
ReceiverDynamic receiver with magnetic field generator
Stabiliser bracketas accessory

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