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U provide filtering on the 20 kHz frequency load longer u allowed to connect the speaker line u three power set u installed on the selected Bosch speaker's built-in base u EN 54 ? 16 certification plaque beautiful voice alarm system USES a simple method of monitoring by measuring the impedance of the speaker. When the cable is long, external factors (such as cable capacitance and speaker impedance) can adversely affect the reliability of the measurement. The virtual load provides filtered load only on the pilot frequency. This greatly improves the reliability of impedance measurements, providing accurate open circuit or short circuit detection even when the cable is long. Basic function in order to improve the performance of impedance measurement, Bosch security systems introduced the bayley virtual load device. It can enhance the negative load of the loudspeaker at a monitoring frequency of 20 kHz, with minimal load within the normal sound frequency range. When connected in parallel with the last speaker on a line, it increases the percentage of impedance at the end of the line, thereby increasing the number of speakers that can be connected. At the same time, it can also increase the amount of excess covered by the cable capacitance, thus allowing the connection of longer cables. The virtual load device USES the appropriate mounting bolts to connect in parallel with the last loudspeaker (must be Bosch speaker) on the line. It is equipped with jumper wire, and the load (20 kHz) can be set to 8, 20 and 60 W according to the calculation results of the virtual load calculator. The virtual load calculator is a spreadsheet that USES macros to calculate whether the associated virtual load should be available for use, and what the best load Settings should be. The e-form can be purchased from all Bosch dealers. Certificate and approved anti-disturbance compliance with EN 50130-4 emergency compliance with EN 54-16 * standard * used in conjunction with voice alarm system; And according to the installation instructions and users to Ann when loading area certification European CE conformity declaration CPD CPD Poland CNBOP attachment number 12 PLN components - DMY60 spot application virtual load device 1 technical specification index input electrical connector temperature soft line voltage is 100 V speaker line index of 8, 20 and 60 W mechanical load size (high x width x) 17 x 30 x 50 mm Install the WLS II weighs 80 grams Environmental requirements in operating temperature - 10 DHS to 55 DHS C + C (14 DHS F to + 131 DHS F) storage temperature and 40 DHS C to + 70 DHS C (40 DHS F - to + 158 DHS F) relative humidity < 95% order information PLN ? DMY60 spot li virtual load device virtual load device (12) per unit. Order number PLN - DMY6