Unregulated DC Power Supplies Open Frame Series: BVU • Low cost unregulated DC power supplies • Field selectable input taps 103/115/126/207/230/253 VAC for fine-tuning output to match actual field conditions • Improved ripple - 3% maximum • Fuse protected output • Computer grade capacitors • Floating output provides versatility for wiring • Safety Agency Approvals: – UL 1950, Third Edition, File #E181899 – CSA C22.2 No. 950, UL File #E181899 – CE Marked The BVU Series Specifications The BVU Series of unregulated DC power supplies is the best low cost alternative, where moderate output variations and AC ripple are acceptable. The field selectable input taps allow fine tuning the output voltage to match actual field conditions. The DC output is fused for short circuit protection. For maximum versatility, the output is floating and may be referenced to another low voltage common ground or placed in series with other DC power supplies. AC Input: 115/230VAC, 50/60Hz nominal. Field selectable taps for +/–10%. High line tolerance on voltage is +10% DC Output: Floating fixed output at full load ratings (see table). Transformer taps provided for approx. 10% output voltage adjustment. Ripple: 3% r.m.s. maximum at nominal line and full rated load. Operating Temperature: 0-50°C (Derate 2% per °C to 70°C) Overload and Short Circuit Protection: Fused output. It should be noted that the fuse is not necessarily direct in line with the output. In most models the fuse is prior to the output capacitor and in case of a short circuit, the capacitor energy will be discharged into the load even if the fuse has opened. Applications • DC motors - stepping and servos • Solenoid valves • Relays • Lamps and signal systems • Input to 3-terminal on-board regulators • Some floppy disc drives Tap (VAC) Nominal (VAC) High Line (VAC) 115,–10% 103.5 113.9 115,NOM 115 126.5 115,+10% 126.5 139.2 230,–10% 207 227.7 230,NOM 230 253.0 230,+10% 253 Schematic shows transformer taps provided for approx. +/–10% output voltage adjustment. Typical full load output voltage at 115VAC input using taps 1 and 3. For 10% higher output voltage use taps 1 and 2. For 10% lower output voltage use taps 1 and 4. +10% 115 VAC HOT 278.3 8 NOMINAL 7 -10% 6 INPUT CONNECTIONS FOR BVU SERIES INPUT VAC 103.5 115 126.5 1-5 JUMPER 2-6 1-5 3-7 1-5 4-8 207 230 AC NEUTRAL 5 253 +10% 2-5 3-5 4-5 115 VAC HOT FUSE AT 16 1-2 1-3 1-4 1-6 1-7 4 NOMINAL 3 — OUTPUT -10% INPUT APPLY + OUTPUT (TERMINAL AT FUSE) 2 1-8 AC NEUTRAL 1 SEE UNIT ID LABEL Phone (630) 628-9999 • Fax (630)628-9922 • http://www.powervolt.com (TERMINAL AT CAPACITOR)