U provides a filtered load at 20 kHz, u allows longer speaker

 lines to be connected, u three power settings u are mounted on the built-in base of the selected Bosch loudspeakers. The U en 54-16 certified variegated voice alarm system uses a simple method of monitoring the speakers by measuring impedance. When the cable is long, external factors (such as cable capacitance and speaker impedance) will adversely affect the reliability of the measurement. Virtual loads provide filtered loads only at pilot audio rates. This greatly improves the reliability of impedance measurement and provides accurate open or short circuit detection even when the cable is long. Basic function in order to improve the performance of impedance measurement, Bosch Security System Company has introduced the vari virtual load device. It can enhance the speaker load at a monitoring frequency of 20 kHz, but has a very small load in 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, thus increasing the number of speakers that can be connected. At the same time, it can also increase the surplus covered by the cable capacitance, thus allowing the connection of longer cables. The virtual load unit is connected in parallel with the last speaker on the line (must be Bosch speaker) using appropriate mounting bolts. It is equipped with jumpers to set the load (20 kHz) to 8, 20 and 60 W based on the calculation of the virtual load calculator. The virtual load calculator is a spreadsheet that allows you to use a macro to calculate whether the relevant application can use the virtual load and how much the best load setting should be. All electronic forms are available from Bosch dealers. Certificate and approved anti-interference in accordance with en 50130-4, emergency compliance with en 54 ￣ 16 * standard * for use with voice alarm system, and area certification when installing according to installation and user's instructions European CE declaration of conformity cpd cpd Poland cnbop accessories quantity component 12 pin-dmy60 variegated virtual load device 1 application specification electrical index input connector High temperature flexible cord voltage 100 V speaker line load 8, 20 and 60 W mechanical index dimensions (H x W x D) 17 x 30 x 50 mm installation WLS II weight about 80 g environmental requirements 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% order information Variegate virtual load device virtual load device (12 per set). Order No. pin-dmy6

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