Purpose
The polarised, high resistance DW bell operates under alternate current with frequencies between 18Hz and 50Hz. It is dedicated for alarm and broadcasting purposes in railways objects. Maximum 10 DW bells and 10 AMB-1 railway phones can be connected to a pair of wires.
DW bell is an electromechanical bell equipped with two aluminium, painted gongs, each with diameter of 130 mm.
The bell can be used inside or outside of the buildings.
DW bell technical data
| Input impedance | > 8 kΩ for signals with 25Hz frequency > 100 kΩ for signals with frequency above 300Hz |
| Signal loudness from 1 m | 95 dB |
| Sensitivity | min 40V ( 18-25Hz) |
| Overal winding resistance | > 3kΩ |
| Casing protection level | IP 65 |
| Dimensions | max. 300 x 290 x 86 mm |
| Operating temperature range | from -25 to +55 ° C |
| Connection | cable clamps max. 2,5 mm2 |
