F 503

S 504

S 503

S 502

S 501

Fig. 3 PCB 85254 Location of the wire jumpers S501 - S504 for altering mains voltage and position of the output fuse F503

5. Battery charging

5.1 Charging the batteries in the battery modules DEM 316 or DEM 317

Once the charging unit has been connected to the battery module correctly, (see Section 3) and the mains voltage is present the green LEDs (3) LINE VOLTAGE, BATTERY VOLTAGE and CHARGE CURRENT light up. The charging current is indicated on the LC display (1), if switch (2) is in position A.

The battery is charged with constant charging current of approx. 4 A. As charging is completed, the charging current decreases rapidly with rising back-e.m.f. of the battery. At the end of charging, the charging current falls to a small floating current of approx. 1 mA/Ah of the capacity of the battary to the loaded, a value which is permanently compatible for the battery. This value can vary with older batteries in particular, amounting to between 0.5 mA and 10 mA per Ah.

Note: lf the connection is faulty, there is no charging current and the green LED (3) CHARGE CURRENT does not light up. Please check all connections between the battery and the charging unit, all fuses and the mains voltage.

The capacity retention of the battery takes place with a constant voltage of 27.3 V at 20°C. The charging voltage is indicated by the LC display (1), if swith (2) is in position V. lf the ambient temperature deviates from +20°C in standby mode, the charging voltage is adapted automatically, depending on the tempera- ture. The temperature coefficient amounts to -40 mV/°C for a 24 V battery.

Note: The charging unit is designed for the connection to one battery module. A parallel connection of batteries is not recommended. Batteries connected in parallel cannot be monitored.

Attention: The charging circuit fuses CHARGE FUSES of the battery modules DEM 315 and DEM 316 must be exchanged for 7.5 A fuses if the charging unit DEM 313 is used. In the event of a faulty fuse, no charging current flows and the green LED (3) CHARGE CURRENT does not light up.

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Dynacord DEM 313 owner manual 503, 504, 502, 501
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DEM 313 specifications

The Dynacord DEM 313 is a versatile and powerful audio system designed for professional sound reinforcement applications. Renowned for its superior sound quality, exceptional durability, and advanced features, this unit has become a preferred choice for touring, live events, and installation.

One of the standout features of the DEM 313 is its robust design, engineered to withstand the rigors of live sound environments. The rugged housing protects the internal components, ensuring reliability during demanding performances. The unit is also lightweight, making it easier for audio technicians to transport and install.

The DEM 313 incorporates a state-of-the-art digital signal processing (DSP) engine, providing precise control over audio signals. This allows users to customize sound according to specific venue requirements. The DSP offers a variety of presets and user-defined parameters, including parametric equalization, crossover settings, and delay adjustments. These features enable optimal tuning to achieve clarity and balance in sound reproduction.

Equipped with multiple input and output options, the DEM 313 can handle a wide range of audio sources. Its configuration includes both analog and digital inputs, allowing seamless integration with various audio equipment. Additionally, the device supports network connectivity, making it compatible with modern audio systems and enabling remote control and monitoring capabilities.

The unit also features comprehensive metering and monitoring tools, providing real-time feedback on audio levels and performance. This ensures that sound engineers can make timely adjustments to maintain sound quality throughout a performance.

User-friendly interfaces and intuitive controls make the DEM 313 accessible to both novice and experienced sound professionals. The display panel presents essential information at a glance, streamlining operation during live events. Furthermore, built-in safety features protect the system from overload and overheating, ensuring consistent performance.

In summary, the Dynacord DEM 313 stands out in the competitive landscape of audio reinforcement technology. With its robust construction, advanced digital signal processing, versatile connectivity options, and user-friendly operation, it is an excellent solution for live sound applications, installations, and entertainment venues. The DEM 313 continues to set a benchmark in professional audio systems, delivering exceptional sound quality and reliability for audio professionals worldwide.
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