The fire-fighters communication system enables a two-way communication between the car of the fire-fighters lift, the fire-fighters access level and the machine room of the lift.
The system consists of three components:
- handset (handset/ exchange)
- fire-com (hands-free speakerphone/ fire-fighters speakerphone)
- free-com (hands-free speakerphone/ car speakerphone)
Fire-fighters operation is initiated via the fire-fighters switch.
|Lines||High, Low, GND, Line|
|Power supply||24 V DC (±15 %)|
|Current consumption (closed-circuit status)||approx. 40 mA|
|Operating voltage||min. 12 V|
|Current consumption (operating status)||approx. 150 mA|
|Current consumption (communication)||approx. 250 mA|
|Network extension (with 0.5 mm²)||max. 250 m|
|Network extension (with 1 mm²)||max. 500 m|
|Number of participants (handsets)||1|
|Number of participants (hands-free speakerphones)||2|