PowerVerter 24Vdc to 12Vdc Converters 24Vdc to 12Vdc Converters Also, the low heat dissipation allows them to be mounted in less well-ventilated positions which makes installation easier. These products offer a convenient way to operate mass produced 12Vdc equipment, such as cell phones, in car entertainment equipment, professional communication equipment, refrigerators, televisions, etc. from the 24Vdc mobile electrical systems found on diesel engined vehicles and vessels and the 28Vdc systems found on aircraft. Rugged and Compact The converters are enclosed in a rugged aluminium extrusion. The low mass Surface Mount Technology components are also less prone to vibration damage, further increasing the reliability of the units. The use of SMT results in very compact unit, making it easier for the installer to find a convenient location. A Comprehensive 24Vdc to 12Vdc Converter Range The PowerVerter converter series, is a sub group of our PowerSelecter range of converters that offer a wide range of input and output voltages between 12Vdc and 48Vdc (see the PowerSelecter leaflet). For voltages above 48Vdc see our PowerMaster Converter leaflet. This leaflet covers the PowerVerter series, ten products from 3 Amps to 30 Amps in isolated or common earth configurations. They have been optimised for high volume 24Vdc to 12Vdc applications such as on heavy goods vehicles, coaches, buses, construction, forestry and agricultural vehicles and commercial vessels, yachts and all types of aircraft. Consequently they are manufactured at low cost and offer excellent value for money. All the products may also be used for constant voltage lead-acid battery charging providing the battery manufacturers guidelines are followed. All the PowerVerter products are CE marked, e marked and meet the requirements of FCC Class B. Secure Isolation It's your choice. The PowerVerter range offers an isolated option at every power rating. Some vehicle manufacturers, such as Scania, require that `the converter shall be ground loss protected'. This means that the output voltage shall not exceed the specification if the supply ground connection or/and the load ground connection is lost. This requires an isolated converter. Isolated converters also prevent a direct connection between the 24Vdc input and the 12Vdc appliance in the case of a semiconductor failure. Cool Running The converters operate with a power conversion efficiency as high as 93%. This results in very little heat being generated. The reliability of semiconductors is inversely proportional to temperature so high efficiency leads to high reliability. The Mean Time Between Failure figure is around 160 years! Tamper Proof There are no ventilation holes to permit stray objects, dust or water droplets to enter the case. No external fuses to be tampered with. Fuses will only blow if there is a fault so there is no need to make them accessible. Fast Installation All the units consume an off load current of less than 15mA, which is probably less than the self discharge current of the vehicle's battery. In most cases this can be ignored, speeding the installation by removing the need to fit a remote switch. All the products fit onto a `Click 'n' Fit' mounting clip which is fixed in three points allowing it to be mounted on uneven surfaces. It is easy to fit the clip into awkward places and then simply click the unit into position. A red LED indicates when there is output from the converter, this gives reassurance to the installation engineer and speeds fault finding. Product Coding The product code is developed as follows, take PV3i as an example: PV PowerVerter 24Vdc to 12Vdc converter 3 3 amps continuous output (12 Vdc output at 3 amps) i Isolated between input and output (s indicates switchmode, non-isolated) AlfaTRONIX for use on vehicles, vessels and aircraft Choose your PowerVerter Isolation All PowerVerters convert 24Vdc to 12Vdc Load Continuous/ intermittent Non-Isolated Common Negative Isolated Input to Output PV3s PV3i PV6s PV6i PV12s PV12i PV18s PV18i PV24s PV24i 3/6A 6/10A 12/18A 18/21A 24/30A The intermittent current may be drawn for a maximum of 2 minutes followed by 8 minutes rest. Technical data Model Size Weight Model Size Weight PV3s 66x87x50mm 256g PV18s, PV24s, PV6s, PV3i 88x87x50mm 318g PV12i 166x87x50mm 610g PV12s, PV6i 126x87x50mm 455g PV18i, PV24i 216x87x50mm 750g Common Characteristics Input Voltage Range 17 to 32Vdc Transient Voltage Protection Meets ISO7637-2 International Standard for 24Vdc Commercial Vehicles Electro Static Voltage Protection Meets ISO10605, ISO14892, >8kV contact, 15kV discharge Output Voltage 13.6Vdc. Worst case limits are +15% and -20% Output Noise <50mV pk-pk at continuous load. Meets CISPR25 and VDE0879-3 Off Load Current <15mA Power Conversion Efficiency Typically: 85% for isolated units, 90% for non-isolated units Isolation >400Vrms between input, output and case, on isolated products only Mean Time Between Failures >162 years (HRD4) Operating Temperature -25C to +30C to meet this specification table +30C to +80C de-rate linearly to 0A Storage Temperature -25C to +100C Operating Humidity 95% max, non condensing Casework Anodised Aluminium, Glass Filled Polycarbonate. Dust water and impact resistance IP533 Connections Four 6.3mm push-on connectors Output Indicator Red LED adjacent to the output terminals Mounting Method "Click `n` Fit" Mounting clip, fitted separately using three hole fixing Safe Area Protection: Over Current Over Heat Transients Catastrophic failure Limited by current sensing circuit Limited by temperature sensing circuit Protected by filters and rugged component selection Protected by internal input and output fuses Approvals 89/336/EEC The EMC Directive 95/54/EC The Automotive EMC Directive 93/68/EEC The CE Marking Directive VIDG5 For use on Police and Fire Vehicles Tested to ISO7637, ISO10605, ISO14892, ISO14893, ISO11451, ISO11452, CISPR 25, VDE0879-3, EN60945 Annex A Markings `CE' Marked and `e' Marked AlfaTronix Limited 29 Newtown Business Park, Poole, Dorset BH12 3LL Great Britain. Tel: +44 (0) 1202 715517. Fax: +44 (0) 1202 715122. E-mail: sales@alfatronix.ltd.uk Web Site: http://www.alfatronix.ltd.uk AlfaTRONIX Manufactured in the European Union by AlfaTronix Ltd., Great Britain GB 07/00