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Ex ResisTel MB - with 3 Programmable Buttons

FHF ResistTel MB Features:

  • 3 Memory Buttons ( programmable)
  • Handsfree operation
  • Temperature range-25°C to +60°C
  • Certified for Dust & Gas
  • IP 66 EN 60529
  • Stainless steel VA4 keypad
  • GRP housing

ResisTel MB

The ResisTel MB is based on the Ex-ResistTel Telephone with the addition of Three memory buttons that are freely programma ble by the user.

The ResisTel MB has been designed for use in the petrochemical industry, on offshore rigs, in mills and harbours, which means it is resistant to large temperature differences, air humidity, sea water, dust and strong mechanical wear and tear. It is Atex Certified for use in hazardous dust and gas atmospheres.

The Ex ResistTel MB has been equipped with a 21-piece stainless (V4A) steel keypad designed for use with gloves.

A range of optional extras and components that are also Ex certified for hazardous areas are available to compliment this Ex Phone. Headset connection, Hands free, Handset Volume adjustment & Connection to external devices

Funke Huster Fernsig

FHF ResisTel MB Specifications
Types of protection
II 2 G EEx em[ib] IIC T5
II 2 D IP66 T100°C
II 2 G EEx em[ib] IIC T6
II 2 D IP66 T80°C
DMT 02 ATEX E 183
Line voltage
24 VDC to 66 VDC
Line current
15 mADC to 100 mADC
Ringing alternating current
24 VAC to 90 VAC (at 21...54 Hz ringing frequency)
30 VAC to 90 VAC (at 16,6...54 Hz ringing frequency)
Ringing impedance
Greater than 6,0 KΩ at 25 Hz and 24...90 VAC Greater than 4,0 KΩ at 50 Hz and 24...90 VAC
Inquiry key
Flash function adjustable from 40ms to 399ms
Dialling procedure
PD-DTMF operation to be set in the menu
DTMF operation according to the CCITT recommendation Q.23
PD operation where the pulse/pause ratio can be set to 1.5:1 or 2:1 in the menu
Connection for external secondary sounder
Screw terminals
Up to 4 mm2 rigid. Up to 2.5 mm2 flexible
FHF ResisTel MB Housing
Glass-fibre-reinforced polyester
H x W x D
Approx. 266 mm x 228 mm x 135 mm
Approx. 5.5 kg
Metal keypad with ice protection
21 keys with ABC lettering for name entries incl 3 Memory Buttons (Free Programmable)
FHF ResisTel MB Receiver
Stabilizer bracket
Integrated, adjustable stabilizer bracket.
Handset cord
Stainless steel (V4A) armoured handset cord.
Receiver inset
Dynamic receiver inset with leakage field spool for inductive coupling of hearing aids
Electret-foil microphone
Noise suppression
Greater than 3dB due to integrated mouthpiece
Environmental conditions
Degree of protection
IP 66 according to EN60529
Impact protection:
IK 09 according to EN50102
Operation temp.
-25°C to +60°C for temperature class T5
-25°C to +40°C for temperature class T6
Storage temp.
-25°C to +70°C
Further characteristics
Ringing sound pressure level
Approx. 90 dB(A) at 1m distance
Ringing melodies
10 melodies selectable
Listening by loudspeaker
Max sound level approx. 68 dB(A)@ 1m
Handsfree operation
Max sound level approx. 68 dB(A)@1m
Amplified receiver
Receiver volume can be boosted from 0 –12 dB(A)