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Bosch offers a full range of sound volume controllers and sound source selectors for a complete public broadcast solution. Basic function operating public broadcast systems are commonly used for information and background music propagation. The volume controller can be used to adjust the volume level locally. In addition to the volume controller, you can install a sound source selector so that you can select 5 different sound sources locally. When broadcasting is required, the built-in relay ensures that the signal is broadcast at a preset volume level, independent of the local volume setting. According to the rated power, the volume controller provides three models: 12 W, 36 W and 100 W. The total load of the loudspeaker connected by the volume controller shall not exceed the rated power. In addition, all three models are available in the following two versions. One is the power-saving 4-wire volume cover version (model /10), which activates the cover relay in the event of an emergency call. The other is the fail-safe 4-wire volume overwrite version (/20), which unactivates the overwrite relay in the event of an emergency call. The design and color of the volume controller is perfect for any indoor environment. In addition, the design process is also optimized for ease of installation, ease of operation and reliability. Interconnected components screw connection with recognized safety compliance certificate EN 60065 standard fire retardant UL 94 where V0 standard installation/configuration LBC 1400/10 and 1400/20 (unit: mm) LBC LBC 1400/20 size and LBC 1410/20 dimension (unit: mm) LBC 1420/10 and 1420/20 (unit: mm) LBC LBC 1420/20 size dimension (unit: Mm) lm1-smb-mk size (unit: 1400/10 mm) LM1 SMB - MK detail of LBC circuit diagram 2 | LBC 14 x0 / x0 MK volume controller and audio source selector LBC LBC 1430/10 1430/10 circuit diagram LBC 1410/10 circuit diagram LBC 1410/20 circuit diagram LBC 1420/10 circuit diagram LBC 1420/20 circuit diagram LBC LBC 1400/10 and 1430/10 circuit diagram specification electrical indicators 12 W / 20 rated power input voltage 100 V attenuation amplitude of 5 x 3 dB + close the frequency response of 50 Hz and 20 kHz (1 dB) THD < 0.5% 3 | LBC 14 x0 / volume controller and LBC x0 MK 1430/10 audio source selector 20 mA current consumption, 24 rated power of VDC LBC 1410/10 and /20 24 VDC LBC 1420/10 and /20 rated power 100 W input voltage 100 V attenuation range 10 x 2 dB + closing frequency response 50 Hz to 20 kHz (-1 dB) THD <0.5% current consumption 20 mA, 24 VDC LBC 1430/10 rated power 100 W input voltage 100 V source number five audio + closed mechanical index and LBC 1400/10/20 size (width x height) x 87 x 87 x 45.6 mm Weight of 226 grams of white color (RAL) 9010 LBC and 1410/10/20 size (width x height) x 87 x 87 x 45.6 mm Weight of 227 grams of color White (9010) RAL LBC and 1420/10/20 size (width x height) x 87 x 147 x 61.5 mm weight 512 grams (including surface installation box) white color (RAL) 9010 LBC 1430/10 size (width x height) x 87 x 87 x 32.9 mm weight 125 grams of white color (RAL) 9010 LM1 SMB - MK size (width x height) x 87.3 X 87.3 x 50 mm Weight of 73 grams of white color (RAL) 9010 environmental requirements operating temperature - 10 ° C to + 55 ° C (+ 14 ° F to 131 ° F) + storage temperature and 40 ° C to + 70 ° C (- 40 ° to 158 ° F) + < relative humidity 95% order information LBC 1400/10 volume fader control, 12 W, MK installation type, built-in 24 VDC cover relay device, energy saving, 5 attenuated steps (3 dB at a time) and closed, white RAL 9010. Order no. 10 LBC LBC1400/1400/20 volume fader control, 12 W, MK installation type, built-in 24 VDC covering the relay, fault protection, five attenuation stride (each increase of 3 dB) and closed, white RAL 9010. Order no. 1410/10 LBC1400/20 LBC volume fader control that 36 W, MK installation type, built-in 24 VDC cover relay device, energy-saving, eight attenuation stride (each increase of 3 dB) and closed, white RAL 9010. Order no. 10 LBC LBC1410/1410/20 volume fader control that 36 W, MK installation type, built-in 24 VDC covering the relay, fault protection, eight attenuation stride (each increase of 3 dB) and closed, white RAL 9010. Order no. 1420/10 LBC1410/20 LBC volume fader controls, 100 W, MKD/E2 installation type, the built-in covered 24 VDC relays, energy saving, 10 attenuation stride (every increase of 2 dB) and closed, white RAL 9010, enclosed is offer surface installation box. Order no. 10 LBC LBC1420/1420/20 volume fader controls, 100 W, MKD/E2 installation type, built-in 24 VDC cover relay, fault protection, 10 attenuation stride (every increase of 2 dB) and closed, white RAL 9010, enclosed is offer surface installation box. The purchase number is lbc1420/20 LBC 1430/10 sound source selector, MK installation type, 5 channels selection, white RAL 9010. Lm1-smb ?MK surface mount box for volume control lbc140/10, lbc1410/20, lbc1410/10, lbc1410/20 and sound source selector lbc1430/10, white RAL 9010. Order number LM1 - SMB - M