PS12LA, PS512M, CH12R, CH512R POWER SUPPLIES AND CHARGING REGULATORS INSTRUCTION MANUAL 06/00 COPYRIGHT (c) 2000 CAMPBELL SCIENTIFIC, INC.
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Warranty and Assistance The PS12LA, PS512M, CH12R, CH512R POWER SUPPLIES AND CHARGING REGULATORS are warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective products.
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PS12LA, PS512M, CH12R, CH512R Power Supplies and Charging Regulators 1. General Description The PS12LA and PS512M are 12 volt power supplies that include the charging regulator and a 7 amp hour battery. The CH12R and CH512R are charging regulators that are used with a Campbell Scientific battery pack such as the BP12 or BP24 or with a user-supplied battery. Charging power is typically supplied by a CSI Model 9591 AC Transformer or by an MSX10 or MSX20 solar panel.
PS12LA, PS512M, CH12R, CH512R Power Supplies and Charging Regulators 3. Wiring An internal or external battery is connected to the charger by means of the INT (Internal) or EXT (External) connectors, as shown in Figure 1. An “external battery” cable comes with the charger that allows connecting another battery to the charger to provide power if the main battery is removed. The red lead connects to the positive battery terminal and the black lead connects to the negative terminal.
PS12LA, PS512M, CH12R, CH512R Power Supplies and Charging Regulators BATT INT These look identical when unplugged EXT CHG Regulator IN 3A Thermal Fuse ON OUT OFF Charging CHG CHG +12 +12 FIGURE 2. Simplified Charging Circuit Schematic 4. Null Modem on PS512M and CH512R The PS512M and CH12R have two 9-pin CS I/O ports on them with a null modem between them. The ports are used to connect two 9-pin devices that would normally be connected to the CS I/O port on a Campbell datalogger.
PS12LA, PS512M, CH12R, CH512R Power Supplies and Charging Regulators +5 V +12 V 1.85 A Thermal Fuse 1 6 2 3 7 8 4 5 9 1 +5 V 2 7 3 8 4 9 5 GND HS Ring +12 V RX TX ME Ring RX TX ME FIGURE 3.
