User manual RANE VC 18 DATASHEET

[. . . ] Professional Audio Products Data Sheet General Description The Rane VC 18 UPS (Uninterruptible Power Supply) Voltage Converter is a special purpose DC-DC converter used to power Rane products equipped with red modular jacks and designed for external Remote AC Power, i. e. , RAP units. [. . . ] The VC 18 works from the AC source until it fails; then it automatically switches over to the battery backup and continues to provide uninterruptible power until the battery runs down. Rule: The required DC current equals one-third (1/3) of the AC current. Therefore simply divide the maximum AC current (silkscreened under the red modular jack & found on the Data Sheet) by three (3) to get the required DC current. This current must be less than 167 milliamps to use a VC 18 (read the asterisk note below). MODEL AC 22/B AC 23/B AP 13 AD 22/B DC 24 DMS 22 GE 30 MS 1 PE 15 PE 17 PS 1 SM 26B SM 82 AC mA 160 260 600 650 600 650 650 220 300 450 175 200 650 DC mA 53 87 200* 217* 200* 217* 217* 73 100 150 58 67 217* * The maximum AC current ratings are in many cases quite conservative. They allow such things as simultaneously driving all output channels to +20dBu levels into 600 ohms, or all LEDs lighting together, etc. Since these events rarely occur in actual use, downrating the required DC current by 20-30% is easily possible. Make such reductions if for your application you do not need 600 ohms line driving ability (overwhelmingly, modern equipment input impedances equal 10, 000 ohms or greater--never as low as 600 ohms), or if you are not using all channels, or if your use is not continuous, or is usually low level, etc. A VC 18-2 has two converters and each drives one output jack, and requires an RS 2 as the AC input device--an RS 1 will not work. [. . . ] on Recycled Paper All features & specifications subject to change without notice 520-303 MAY96 [. . . ]