Functions, Dependability | Bosch Appliances LBB 1938/20 instruction

Communications Systems LBB 1938/20 Plena Power Amplifier

LBB 1938/20 Plena Power Amplifier

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The LBB 1938/20 is a powerful 480 W power amplifier in a 3U high 19”case for rack mounting or tabletop use. LEDs on the front panel show the status of the amplifier: power, audio output level, and supervised functions. This high-performance unit fulfills a wide range of public address requirements at a surprisingly low cost.

Functions

Dependability

The amplifier is protected against overload and short circuits. A temperature-controlled fan ensures high reliability at high output levels and low acoustic noise at lower output levels. An overheat protection circuit switches off the power stage and activates an LED on the front panel, if the internal temperature reaches a critical limit due to poor ventilation or overload.

The unit operates both on mains power and on a 24 V battery power supply for emergency back up, with automatic switchover.

For emergency and evacuation use, the following functions are monitored: mains presence, battery present, pilot tone presence, amplifier operation.

Front panel LEDs indicate the status of supervised functions. The LEDs of pilot tone supervision and

u480 W power amplifier in a 3U high 19”housing

uEN 54‑16 certified and EN 60849 compliant

u70 V / 100 V and 8 ohm outputs

uDual inputs with priority switching

u100 V input for slave operation on 100 V speaker line

battery status can be switched off for general public address use. Failsafe (normally energized) relays are provided for each supervised function. These relays are always active regardless of the switches on the rear panel.

Input

The system has two balanced inputs with priority control, each with a loop-through facility. This makes it easy to connect remote systems that require priority control. An additional 100 V line input is provided to connect the amplifier to a 100 V loudspeaker line, to provide more power to remote locations.

Gain or level control is located on the rear of the unit to avoid accidental setting change. A meter with LED- bar shows the output level.

Output

The amplifier has 70 V and 100 V outputs for constant voltage loudspeaker systems and a low impedance output for 8 ohm loudspeaker loads.

The LBB 1938/20 has two separate priority controlled 100 V outputs for zones that only need announcements made via the priority input, and for zones that will not get any announcements made via the priority input.

LBB 1938/20 specifications

Bosch Appliances has built a reputation for quality and innovation, and the LBB 1938/20 is a testament to this commitment. This integrated dishwasher combines functionality with cutting-edge technology, making it a great addition to modern kitchens.

One of the standout features of the LBB 1938/20 is its exceptional energy efficiency. With an A+++ energy rating, it not only helps reduce your carbon footprint but also lowers utility bills. This model is designed to consume minimal water and electricity while delivering outstanding cleaning performance, making it a sustainable choice for eco-conscious consumers.

Another significant aspect of the Bosch LBB 1938/20 is its impressive flexibility. The spacious interior accommodates up to 13 place settings, allowing you to tackle everything from everyday dishes to large holiday gatherings swiftly. The adjustable racks are designed to maximize space utilization, and the VarioFlex system offers multiple configurations, ensuring that even larger pots and pans can be cleaned without hassle.

The innovative AquaStop system is another key feature of this dishwasher. It provides a 100% guarantee against water damage by automatically shutting off the water supply in case of any leaks, providing peace of mind for homeowners. Additionally, the ProClean spray system ensures that every dish receives thorough and even cleaning. The multi-directional rotating spray arms increase coverage, effectively removing food residues and ensuring sparkling clean results every time.

Noise levels are another concern when it comes to dishwashing. The Bosch LBB 1938/20 operates at a whisper-quiet 44 dB, making it one of the quieter dishwashers in its class. This allows for late-night cleaning cycles without disturbing household activities.

Bosch incorporates smart technology into the LBB 1938/20 with features like the Home Connect system. This allows users to control the dishwasher remotely using their smartphones or smart home devices, providing convenience and flexibility. You can start or monitor cycles, receive notifications, and even solve issues through the app, streamlining the dishwashing process.

In conclusion, the Bosch Appliances LBB 1938/20 dishwasher stands out with its energy efficiency, spacious interior, flexible configurations, and advanced technologies. Whether you live in a busy household or simply want a reliable appliance to make life easier, this dishwasher is designed to meet your needs while enhancing the overall kitchen experience. Bosch continues to redefine what modern home appliances can offer, and the LBB 1938/20 is a prime example of that vision.