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Download Model: PSB-12-2 Power Supply and Battery and Load Management
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Model: PSB-12-2 Power Supply and Battery and Load Management System Rev: b 08/2011 VLF Designs 1621 Bella Vista Dr. Jackson, Mo. 63755 573-204-1286 [email protected] Power System Overview The PSB-12-2 is the second generation 12V battery system with an integral updated battery charge and load management system (BC-12b). Connectors have been provided for the quick connection of an AC line operated DC power, solar panel (s), external battery and external essential and non-essential loads. The power system is configured around the BC-12b battery management system and a 70 watt universal AC input 15VDC power supply. (If the unit is to be operated on ac power below 0˚F for an extended period of time an 18 VDC power supply will be supplied in place of the 15 VDC unit.) Full specifications and adjustment instructions for the BC12b can be found in the accompanying manual. Operation AC Power Input The input to the DC power supply can be between 100 and 240 VAC, 50 or 60 Hz. The power supply is auto switching and requires no jumper setting when changing operating line voltage. The output of the AC operated power supply is 15VDC (18VDC) and it can supply up to 4.5A (3.5A)of output current. A defective battery with internally shorted cells may force the AC power supply into fold back current limiting. Foldback current limiting is indicated by a slowly, brightly, flashing yellow AC power source LED. The charger will attempt to charge the batteries but it will be impossible for full charge to be attained under these conditions. Foldback limiting of this type prevents damage to the DC power supply and the BC-12b. Batteries containing shorted cells should be replaced. When operating the system with only an AC derived power source, the battery must be connected before power can be supplied to the load. The battery may be subsequently removed for change out without loss of power to the load, provided the AC source does not lose power during that period. The ac power cord is provided with a standard North American type power plug (NEMA5-15). For use overseas, adapters can be purchased which will convert the plug to a different style. Voltage conversion is not required when these types of adapters are used. No transient suppression has been provided on the AC line. If transient conditions are likely, an external surge suppressor should be employed. The ground conductor in the AC power conductor is connected to the back plane in the box, and also connected to the aux ground connections in the solar panel and essential load connectors. Solar panel Input The connector for the solar panel input has connections for two solar panels, and when used with the BC-12b these two inputs are connected to the individual solar inputs to the regulator. Normally a single solar panel will be connected to the SP1 inputs. If a second solar panel is used, it should be connected to the SP2 input and the internal DC power supply should be unplugged from the BC-12b. Keeping the power supply connected will not damage the supply, however part of the second solar panels’ input power will be wasted in the internal circuitry of the DC power supply. A ground connection which is returned to ground via the ac power cord is provided for convenience grounding of the solar panel frames and mounts in order to minimize lightning damage. If the solar panels are used where there is a high probability of lightning damage, an additional high current external path to ground is highly desirable. No additional protection of the BC-12 solar panel input is required, as the protection is internal to the regulator. External Battery Connection The external battery can be of any amp hour capacity, although practical consideration limit the capacity to around 800AH. (a higher current charge system should be considered for battery capacities in excess of 800AH, unless the connected load is light). A 6 ft cable with 3/8” ring lugs is provided. Red is positive and black is ground. Use extreme caution when connecting batteries in parallel, as there is a high risk of fire or explosion if an accidental short circuit or misconnection occurs. The case of the BC-12b regulator is connected to circuit common via the power supply coaxial connector. Power supply (-), solar panel (-), battery (-) and output commons are all connected together inside the regulator. External Load Connections The external essential load connection is used to supply power to the data recorder and any sensors connected to the recorder. An additional pin in this connector is available for connection of recorder ground to power ground and may help protect the recorder from damage from transients. Power will be supplied to this connector until the battery voltage drops below 11.9 VDC. The non-essential load connection is for use with external additional communications and telemetry hardware. If radio telemetry equipment using an external antenna is to be powered from this output, the antenna and its support should be well grounded and a connection should be provided to the essential load ground as well to minimize damage to the telemetry equipment from any potential difference that may exist between the various system grounds. Power will be supplied to this connector until the battery voltage drops below 12.4 VDC. Cautions Always remove AC power from the box before servicing the internal contents of the box to avoid a possible severe electrical shock should you accidentally come in contact with the AC power system wiring. Avoid servicing or contacting any of the components of the system during a lightning storm in order to prevent serious injury to the equipment operator. Screw on dust caps have been provided for all input and output connections. In order to maintain system and connector integrity, all unused ports should be capped. Connector Pin Outs AC Power MS3106A-14s-7s A Power Hot B Ground C Power Neutral Essential Load MS3106A-14s-7p A (+) 12VDC out B Ground C Power Common Solar Panels MS3106A-14s-5p A Ground B Solar Panel #1 (main) (+) C Solar Panel #2 (+) D Solar Panel #2 (-) E Solar Panel #1 (main) (+) Non-Essential Load MS3106A-12s-3s A (+) 12VDC out B Power Common Battery MS3106A-12s-3p A Battery (+) B Battery (-)