Battery and network-independent telephone system for applications under rough conditions, even in potentially explosive or firedamp-endangered areas. Without any external power supply or complex equipment, it can be installed in blast furnace areas, in tunnel building or mining areas, offshore, on an oil rig, in a deepsea
vessel, or in any place that is not (yet) connected to any energy source.

This dynamic telephony represents an ideal opportunity for connection.

The howl call telephone is a battery-free and network-independent telephone with highly efficient dynamic transmitter and receiver capsules offering remote communication without power supply.

Can be used in:
I M1 Ex ia I Ma
Ex II 1G Ex ia IIC T6 Ga
Zones: 0, 1, 2.


Download Product Data Sheet - Inpratex

I M1 Ex ia I Ma
Ex II 1G Ex ia IIC T6 Ga

Certificate: EU-Type Examination Certificate

Weight 5069: Approx. 1 kg
Weight 5220: Approx. 2,5 kg

Maximum output voltage: Uo +/- 10 V

Maximum output current: Io +/- 155 mA

Maximum output power: Po 390 mW

Ringing frequency: f ~ 1540 Hz

Talking frequency: f ≤ 3000 Hz

Talking voltage: U ≤ 2 Vss

Talking current: I ≤ 10 mA

Mode of operation: 100 % duty cycle

Housing: Polyamide (Black)

Operating temperature: -20ºC to +40ºC

Ingress protection: IP54

Connection: 2-wire blue power cable

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