Specifications

Bosch Security Systems | 2003-09 | 3922 988 99483en
Plena System Pre-amplifier | Installation and Operating Manual | en | 25
9.2 All-call call station LBB 1941
9.2.1 Electrical
Power supply
Voltage range 18 to 24 V (24 V supplied by LBB1925/10)
Current consumption <30 mA
9.2.2Performance
Nominal sensitivity 85dBSPL (gain preset 0dB)
Nominal output level 700mV
Maximum input sound level 110 dB SPL
Gain preset +6/0/-15 dB
Limiter threshold 2 V
Compression ratio limiter 1:20
Distortion <0.6% (maximum input)
Equivalent input noise level 25 dBA SPL
Frequency response 100 Hz to 16 kHz
Speech filter -3 dB at 315 Hz, high-pass, 6 dB/oct
Output impedance 200 Ohm
9.2.3Environmental conditions
Operating temperature range -10 to +55°C
Storage temperature range -40 to +70°C
Relative humidity <95%
9.2.4General
EMC emission acc. to EN 55103-1
EMC immunity acc. to EN 55103-2
Dimensions 40 x 100 x 235 mm (base)
390 mm stem length (with microphone)
Weight approx. 1 kg
Cable length 5 m (may be extended up to 500 m
using CAT-5 style shielded cable)
Technical data