User manual ELECTRO-VOICE DEM 317
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Manual abstract: user guide ELECTRO-VOICE DEM 317
Detailed instructions for use are in the User's Guide.
[. . . ] However, electrical equipment which serves to pass on messages may also be powered by the said source. An automatic charging device is required to charge and maintain the battery. It must be able to charge a battery which is discharged to its discharge voltage up to 80% max. [. . . ] Please note that lines laid in cable channels have a lower permissible current loading due to lower heat dissipation.
The following are guidelines for bundled lines Number of lines 2 to 5 6 to 15 16 to 30 Reduction factor 0. 8 0. 7 0. 5
Module type DEM 287 power amp. 400 W with NRS 90 144
Current consumption at Ebat = 24 V Standby rated power rated power -10 dB wert 10 mA 10 mA 10 mA 2. 5 A 3. 5 A 7A 5. 7 A 10. 6 A 19. 7 A
7. 5 A 10 A 20 A
Fuse values of the battery outputs for connection of power amplifiers
Table II shows the maximum currents which can be drawn from the batteries. This gives the maximum number of power amplifiers which can be powered by the batteries.
Battery type DEM 316 DEM 317
I max in A 100 150
max. number of power amplifiers* DEM 287 DEM 288 17 25 9 13
DEM 289 5 7
Table II Maximum currents and number of power amplifiers
* The number of power amplifiers which can be directly connected to the battery drawers can be lower than the values specified in Table II (see number of outputs, section 8, specifications). The values specified in the Table only refer to the connection of one amplifier type to one battery type. As long as the maximum current drawn is observed, however, various types of amplifier can be supplied by one type of battery.
Circuit diagram of the battery connection to the charging device.
2. 4. BATTERY CONTROL connection The battery drawers are equipped with a exhaustive discharge protection which is controlled by the monitoring module in the charging device DEM 313. The monitoring circuit checks whether the battery's discharge voltage has been reached when the batteries are discharged. If the battery voltage is less than 19. 5 V, measured at the battery poles, the consumers are disconnected from the battery and the battery is thus reliably protected from exhaustive discharge. If the 15-pole plug connector BATTERY CONTROL has not been correctly connected with the charging device, or if the battery voltage is lower than the discharge voltage, the battery outputs are not live
The connection of the temperature sensor for the temperature tracking of the battery voltage takes place via contact 5 (+temp) and contact 6 (-temp) of the 15-pole plug connector BATTERY CONTROL to the charging device DEM 313. If the connection is faulty, the temperature tracking does not work and the battery will not charged. In the case of the battery module DEM 317, the temperature sensor is located in the module DEM 317A. 2. 5 Connection for battery charging Connection of the charging device to the battery takes place via the flat pin connector CHARGE CURRENT. The plus pole of the charging device is to be connected to the plus pole of the battery, and the minus pole of the charging device is to be connected to the minus pole of the battery. (Please also see the operating instructions of the charging devices).
3. Notes for the user 3. 1 Use of the battery is to be avoided in the following locations. [. . . ] The annual services may be linked with the quarterly inspections if so desired, meaning that all sections of the apparatus are inspected within one year. For the battery of an alarm device this means: quarterly tests and annual malfunction simulations of the operating duration with the consumers. We recommend carrying out the battery capacity test in accordance with DIN 43 539 part 1, whereby the battery manufacturer's instructions are to be observed. [. . . ]
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