Product Description
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Stylish six-zone call station for the Plena Voice Alarm System
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Six zone selection keys, all-call key and momentary PTT-key for calls
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Selectable gain, speech filter, limiter, and output level for improved intelligibility
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LED indications for zone selection, fault, and emergency state
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Call station extension provides seven additional zone and zone group keys
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Each call station supports six zone selections
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The number of selectable zones or zone groups can be increased by connecting call station keypads (LBB1957/00)
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Up to eight keypads can be added with each keypad adding seven zone or zone-group keys
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This call station features selectable gain, a selectable speech filter, and a limiter for improved intelligibility
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The call station has a balanced line level output,making it possible to position it up to 1000 meters
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from the controller, using CAT-5 extension cables
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With shielded cable, the call station can also be used in an EMC level 5 (heavy industry)environment
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DIP switches at the base of the call station select different microphone gain levels, the call station ID,
and the speech filter -
A service accessible rotary control provides microphone level attenuation
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LEDs on the call station show which zones have been selected
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Three additional LEDs give visible feedback on the active state of the microphone and the system
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Green flashing means standby (chime is sounding)
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Green indicates microphone active
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Amber indicates that the system has detected a fault, and red indicates that the system is in the emergency state
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Controls and indicators
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Four status LEDs
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PTT-key
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PTT status LED
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Six zone selection keys
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Six zone selection LEDs
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All-call key
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Eight DIP switches
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Rotary volume control
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Interconnections
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Two RJ45 jacks
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24 VDC input
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Keypad connector
Product Specification
| Brand | Bosch |
| Product Type | Alarm Call Station |
| Product Model | LBB1956/00 |
| Power Supply | |
| Voltage Range | 24 VDC supplied by LBB 1990/00 |
| Current Consumption | <30 mA (plus <15 mA per keypad) |
| Performance | |
| Nominal Sensitivity | 85 dB SPL (gain preset 0 dB) |
| Nominal Output Level | 700 mV |
| Input Sound Level (Maximum) | 110 dB SPL |
| Gain Preset | 6 / 0 / -15 dB |
| Limiter Threshold | 2 V |
| Compression Ratio Limiter | 1:20 |
| Distortion | <0.6% (maximum input) |
| Input Noise Level (Equiv.) | 25 dB SPLA |
| Frequency Response | 100 Hz to 16 kHz |
| Speech Filter | -3dB at 315 Hz, high-pass, 6 dB/oct |
| Output Impedance | 200 ohm |
| Selections | |
| Chimes | Any wave file |
| Priorities | 7 |
| Environmental | |
| Operating Temperature | -10 ºC to 45 ºC (14 ºF to 113 ºF) |
| Storage Temperature | -40 ºC to 70 ºC (-40 ºF to 158 ºF) |
| Relative Humidity | <95% |
| Mechanical | |
| Mounting | Standalone |
| Stem Length With Mic | 390 mm (15.35 in) |
| Cable Length | 5 m (16.4 ft) |
| Color | Charcoal with silver |
| Base Dimensions | <
$
71.16
$
54.74
$
23.99
$
67.34
$
51.80
$
101.34
$
79.95
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59.31
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45.62
$
77.57
$
59.67
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44.99
$
77.45
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59.58
$
77.34
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59.49
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20.00
$
66.94
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51.49
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