BOSCH Volume Control LBC-1400

BOSCH LBC 1400/10 Volume Control (Attenuator)

12 Watt versions
Built-in 24 V DC override relay
Continuous rotating system
Suitable for both 3-wire and 4-wire systems
Up to 5-channel program selector
Fits within MK, U40 and Japanese installation material
Optional surface mounting box for MK and U40 versions
Comply with international installation and safety regulations
Bosch introduces a full range of volume controls and program selectors in order to provide a complete PA solution.

Functions

Operation
Public address systems are often used for both announcements and background music distribution. Volume controls can be used to adjust the level locally. In addition to volume control, program selectors can also be installed to select five different programs locally. In the event of an (emergency) announcement, the built-in relay ensures that the message is broadcast at a preset level, independent of the local volume setting.
The volume controls come in three versions according to power rating: 12 Watt. The total load of the loudspeakers connected to a volume control may not exceed the rated power. Each of the three versions is also available in two versions. One is a power-saving, 4-wire volume override (/10 models), where the override relay is activated during an emergency call. The other is a failsafe, 4-wire volume override (/20 models), where the override relay is deactivated during an emergency call.
The design and color are unobtrusive in any interior. Ease of installation, operation and reliability is optimized in the design.

Interconnections
Screw connections

Certifications and approvals
*Safety acc. to EN 60065
*Self-extinguishing acc. to UL 94 V0

Technical specifications

Electrical
Rated power : 12 Watt
Input voltage : 100 V
Attenuation steps : 5 x 3 dB + off
Frequency response : 50 Hz to 20 kHz (-1 dB)
THD : <0.5%
Current consumption : 20 mA at 24 VDC

Mechanical
Dimensions (W x H x D) : 87 x 87 x 45.6 mm
Weight : 226 g
Color : White (RAL 9010)

Environmental
Operating temperature : -10 C to +55 C (+14 F to +131 F)
Storage temperature : -40 C to +70 C (-40 F to +158 F)
Relative humidity : <95%