Specifications

Personal Security Data Book |97
TECHNICAL SPECIFICATIONS
Coupler LBB 5840/00
Power supply: 11 - 14 V
Current consumption:
with one coupler head: 700 to 770 mA.
with 4 coupler heads: 1050 to 1150 mA.
Output line level:
code transmission: -1,8 V
transmitter on: > -19 V
transmitter off: < -28 V
Open voltage on
alarm contacts : -20 V
Talk back input level: 0 dBm
Talk back band width: 300 to 2900 Hz (-3 dB)
Talk back impedance: 600 Ohm
Code output level: 2,2 Vpp
Speech output level: 0 dBm
Output impedance: 30 Ohm
Amplification from telephone
output (“meet me”): +0,5 dB
Coupler head LBB 5841/00
Input loop current: 10 to 60 mA
Input impedence: 640 Ohm
(300 to 3400 Hz,
measured at 25 mA input current)
Ringing current frequency: 10 to 100 Hz
Ringing current amplitude: 23 to 36 dBm
Input speech level: 0 dBm
Input DTMF level: -12 to 0 dBm
Signal tone range: 280 to 1082 Hz
Duty cycle of dial pulses: 25 to 75%
Audio band width: 70 to 2400 Hz (-3 dB)
Dialling speed: 9 to 22 Hz
DTMF decoder LBB 5841/05
Acceptable twist
(high tone/ low tone): -8 to -4 dB
Detection time: 20 to 40 msec.
Pause time: 25 to 40 msec.
Noise tolerance: -12 dB
Dial tone tolerance: 0 dB
Input impedance: 100 kOhm
ENVIRONMENTAL
Temperature range: operating: -20°C to +55°C
storage: -40°C to +70°C
Relative humidity: <95%
Operating conditions: stationary
Susceptibility to radiation: in an E.M. field of 1 V/m
(100 kHz to 1000 MHz)
the coupler complies
with the specification
Safety: according to IEC 65
Pollution: according to CISPRE/
CENELECspecifications,
cat II (VDE 871 class B)
Dutch PTT TD 280
German FTZ VDE 0875,
Stîrgrad N
MTBF: 50.000 hours
Dimensions: 33 x 14 x 29 cm
Weight: approx. 5 kg