Related Manuals for Bosch LBB 1925
Summary of Contents for Bosch LBB 1925
- Page 1 Plena System Pre-amplifier and Call Stations Installation and Operating Manual LBB 1925/10, LBB 1941, LBB 1946...
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Page 3: Important Safeguards
This is a safety feature. If you are unable to insert the plug into the outlet, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the grounding-type lug. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 4: About This Manual
Do not open the unit when it is connected to the mains. The unit contains non-insulated parts, which can cause electric shock. Caution There are no user-serviceable parts inside the unit. Service must be done by qualified personnel. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 5: Table Of Contents
All-call call station LBB 1941 ..........................25 9.2.1 Electrical ................................25 9.2.2 Performance ...............................25 9.2.3 Environmental conditions ..........................25 9.2.4 General ................................25 6-zone call station LBB 1946 ..........................26 9.3.1 Electrical ................................26 9.3.2 Performance ...............................26 Bosch Security Systems | 2003-09 | 3922 988 92483en... -
Page 6: Plena System Pre-Amplifier | Installation And Operating Manual | Table Of Contents En
Plena System Pre-amplifier | Installation and Operating Manual | Table of contents en | 6 9.3.3 Selections ................................26 9.3.4 Environmental conditions ..........................26 9.3.5 General ................................26 Chime tone tables................................27 Bosch Security Systems | 2003-09 | 3922 988 92483en... -
Page 7: About The System Pre-Amplifier
(CD, Tape and AUX) and a direct XLR output for 2-channel use. Internal relays control the audio routing to the 6 zones. The zone selection keys at the front determine to which zones the background music is send. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 8: Controls & Connections (Front)
19 Music input from booster (terminal) 9 24V DC input (terminal) 20 Mains voltage switch (115/230V) 10 Earth connection screw 21 Mains socket 11 Volume control (Tel/Emergency input) 22 Mains fuse Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 9: Internal Settings (System Pre-Amplifier)
8). You can find the chime tone tables at the end of the manual. With S301 (bit 5) the 2-tone chime on the DIN priority contact for mic/line can be enabled or disabled. The 2-tone chime is 554 Hz (1s), 440 Hz (1s). You can set the chime volume with VR1. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 10: Setting The Speech Filter And Call Station Volume
3 All-call call station LBB 1941 4 6-zone call station LBB 1946 (DIP switch setting of LBB 1946) 5 6-zone call station LBB 1946 (DIP switch setting of LBB 1946) 6 Background music and mic/line input Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 11: Setting Single And Dual Channel Use
At the same time also the Call Active relay is activated, providing a potential free contact. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 12: Installation In Rack (System Pre-Amplifier)
If you mount the pre-amplifier in a rack, you must: • use the mounting brackets delivered with the unit. • remove the 4 feet from the bottom of the unit. (Without the feet the unit is 2U high.) Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 13: External Settings And Connections (System Pre-Amplifier)
You can earth the unit to increase the electrical stability of the system. Caution The connection cable must have an in-line fuse. Use the type of fuse as mentioned in the illustration. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 14: Connect A Microphone
Note If you want to use the priority feature, you must use a microphone or line-level source with a priority contact on pin 4 and 5 of the 5-pole DIN plug. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 15: Connect The Call Stations
If a priority microphone, call station, emergency input or trigger input is activated, the Call Active relay is closed and the override contacts of the selected loudspeaker zones are activated. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 16: Connect Audio Sources For Background Music
It is also possible to use the output of a PC soundcard to supply music or time signals to the system pre-amplifier. To do so connect the soundcard output to the 'PC Audio ln' input. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 17: Connect To A Booster
'Call in' (terminal) of the system pre-amplifier. For dual channel operation you must also connect the Music output to a second booster. The signal from this booster must be returned to the 'Music in' (terminal) of the system pre-amplifier. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 18: Operation (System Pre-Amplifier)
To select the zones to which the background music must be send press the keys on the right hand panel. When a zone is active the indication LED is on. Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 19: About The Call Stations
Amber Figure 6.2 The Plena Call Stations must be used in combination with the system pre-amplifier LBB 1925. Both call stations have a loopthrough connection to add an additional call station. The 6-zone call station (LBB 1946) has the possibility to send a message to one zone, a group of zones or all zones. The all-call call station (LBB 1941) can only send a message to all zones. -
Page 20: Controls & Connections (Top)
The call stations LBB 1941 and LBB 1946 can be connected in a loop-through arrangement to the LBB 1925. Each input of the LBB 1925 can have up to 4 call stations. The call station cable may be extended up to 500 m from the LBB 1925, using shielded CAT-5 quality cable (four twisted pairs with one overall shield) and 8-pin DIN connectors. -
Page 21: Internal Settings (Call Stations)
Figure 7.1 The chime for the all-call call station (LBB 1941) is set inside the LBB 1925 system pre-amplifier. The chime for the 6-zone call station (LBB 1946) is set within the call station with DIP switch S8 (bit 3 to 8). The chime volume can be set with VR1. -
Page 22: Operation (Call Stations)
Yellow flashing The PTT key is pressed, but no zones were selected. Only LBB 1946 Green The microphone is on. Both Green flashing The chime tone is active. Only LBB 1946 Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 23: Technical Data
S/N (flat at max volume) >70 dB S/N (flat at min volume/muted) >75 dB Headroom >25 dB PC input (Cinch, unbalanced, stereo converted to mono) Sensitivity Impedance 22 kOhm >70 dB Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 24: Outputs
EMC emission acc. to EN 55103-1 EMC immunity acc. to EN 55103-2 Dimensions 100 x 430 x 270 mm (19” wide, 2U high) Weight approx. 5 kg 19” mounting brackets included Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 25: All-Call Call Station Lbb 1941
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) Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 26: 6-Zone Call Station Lbb 1946
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) Bosch Security Systems | 2003-09 | 3922 988 99483en... -
Page 27: Chime Tone Tables
392Hz (1s), 523Hz (1s), 659Hz (2s) and release tone in reverse order 196Hz (1s), 262Hz (1s), 330Hz (1s), 392Hz (2s) and release with tones 659Hz (1s), 523Hz (1s), 392Hz (1s), 330Hz (2s) Bosch Security Systems | 2003-09 | 3922 988 99483en... - Page 28 196Hz (0.5s), 262Hz (0.5s), 330Hz (0.5s), 392Hz (0.5s) and release with reverse 659Hz (0.5s), 523Hz (0.5s) 392Hz (0.5s), 330Hz (1s) Priority level 2 Priority level 1 No allowed Bosch Security Systems | 2003-09 | 3922 988 99483en...
- Page 30 For more information visit www.boschsecuritysystems.com © Bosch Security Systems B.V. Data subject to change without notice 2003-09 | 3922 988 99483en...