Regulators / PS100
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PS100 12 V Power Supply with Charging Regulator and 7 Ah Rechargeable Battery
Services Available
Repair Yes
Calibration No
Free Support Yes


The PS100 provides a 12-Vdc, 7-Ah rechargeable power supply for the CR500, CR510, CR800, CR850, CR10, CR10X, and CR1000 dataloggers and peripherals. The rechargeable battery can be trickle-charged from ac power (requires optional wall charger) or from an external solar panel. The user can add an external rechargeable battery.

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Technical Description

The PS100 can also be used as a separate auxiliary 12-V power supply to power remotely located sensors or peripherals, such as a multiplexer located at a distance from the datalogger enclosure. However, to avoid errors in analog measurements and ground loops, the power supplies must share a common ground.


input Voltage (CHG Terminals) 15 to 28 Vdc or 18 Vac RMS
Charging Output Voltage Temperature compensated float charge (for 12 V battery)
Output Limit (12V and G Terminals) 3.0 A (temperature dependent)
Charging Current Limit 1.2 A (typical)
Power Out (+12 Terminals) Voltage Unregulated 12 V (from battery)
Nominal Rating 7 Ah
Dimensions 10.5 x 19.3 x 7.1 cm (4.1 x 7.6 x 2.8 in.) including mounts and connectors
Weight 3.1 kg (6.9 lb)
Battery Weight 2.7 kg (5.9 lb)

Quiescent Current

Charge Source Present 3 to 5 mA
No Charge Source Present 0 mA


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.


Product Compatible Note
CR1000 (retired)
CR200X (retired)
CR216X (retired)
CR3000 Typically, a CR23X, CR3000, or CR5000 datalogger uses its integrated rechargeable base instead of the PS100. However, the PS100 can be used if the data logger has a low-profile base or if the battery base has been disconnected.
CR5000 (retired) Typically, a CR23X, CR3000, or CR5000 datalogger uses its integrated rechargeable base instead of the PS100. However, the PS100 can be used if the data logger has a low-profile base or if the battery base has been disconnected.
CR800 (retired)
CR850 (retired)
CR9000X (retired)

Power Supplies

Product Compatible Note

Mounting Equipment

Product Compatible Note


Product Compatible Note

Additional Compatibility Information

Enclosure Considerations

A desiccated, non-condensing environment is required. The PS100 includes built-in keyhole flanges for mounting to the backplate of a Campbell Scientific enclosure.


The PS100 is compatible with the A100 null-modem adapter and the A105 adapter for additional 12 V output terminals. The A100 Null Modem Adapter connects and powers two Campbell Scientific peripherals via two CS I/O 9-pin connectors configured as a null modem. This is useful in linking different communications technologies, such as telephone to radio, at sites that do not have a data logger. The A105 adapter may be used to provide additional 12 V and ground terminals where the power supply is used to power several devices.

Charging Source

The PS100 charges with a 24 V input. However, when the battery is discharged or the system is pulling high current (about 700 mA), the regulator overheats. This, in turn, limits the charging time because the regulator is heating up until it gets so hot that it shuts down. At this point, the regulator stops charging the battery until the regulator cools down and starts charging again. This cycle repeats until the battery is charged enough so that the regulator no longer overheats. For a system with a constant current drain of 0.7 A or higher, the PS100 is not able to keep the battery charged unless the input voltage is between 16 and 20 V. If the input voltage is between 16 and 20 V, the regulator outputs continuously up to a 1.2 A load.

Videos & Tutorials

FAQs for

Number of FAQs related to PS100: 31

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  1. Yes. The G and 12V terminals on the charge regulator are used to connect the black and red wires that connect with the green connector, which provides power to the data logger.

  2. The PS100, PS150, and PS200 models take in AC or DC power from a wall transformer or a solar panel. The internal regulator controls the charge to the battery to make sure the battery doesn’t become overcharged (based on temperature).

    If the switch is on, the voltage from the battery will flow back out from the regulated battery to the loads; however, the voltage on that battery may be 11.9 V, 13.2 V, or some other value that the battery happens to be at. It is important to understand that the voltage will not always be exactly 12.0 Vdc. Rather, the voltage will float up or down as the battery is recharged or depleted.

  3. The voltage from a solar panel will fluctuate throughout the day.

    If AC power is being used, the voltage is usually stable. 

    The voltages coming into the regulator inputs are controlled so that the battery won’t be overcharged (and thus ruined by boiling out the electrolyte). If the battery connected to the regulator is good, the highest voltage you will likely see is just above 14 Vdc in the extreme cold, but normally it should be around 13.2 Vdc. 

    If you have a nearly dead battery (to be checked with a voltmeter) or a battery with shorted cells, you will see a very low battery voltage. The lowest voltage you will see on the data logger data is usually about 10.0 V because the data logger will shut down near that level and then wait for the voltage to increase to an 11- or 12-volt level.

    The ripple voltage is a few millivolts flowing into the battery, but the battery should filter out most of that noise, providing a pretty stable voltage.

  4. Connecting a 55 W solar panel to a PS100 will not damage the PS100. However, the current passing from the solar panel to the battery is limited to a maximum of approximately 1.2 A. Therefore, the full benefit of the 55 W solar panel is not realized. A better option may be to use a 55 W solar panel with a PS200 or CH200.

  5. The external battery can be as large as the BP84; however, there is still a limitation of a 1.2 A charging current, as well as other specifications of the PS100. If higher charging currents are needed, use the PS200, Smart Power Supply and Charge Controller, or pn 18529, 10A, 12 V, Morningstar Regulator.

  6. Yes. The PS100 can be continuously connected to the 29796 or 9591 wall charger on ac power.

  7. Yes. The 7 Ah battery can be purchased locally to save on shipping costs. Purchase pn 17057PS100 Power Supply with No Battery.

  8. The charging time is dependent on the size of the solar panel or wall charger, as well as the level of discharge of the battery.

  9. Not directly. However, a DCDC18R Boost Regulator can be used to boost the voltage of the 12 V, 100 Ah battery up to the required 18 V.

  10. Campbell Scientific recommends letting an idle PS100 charge continuously in an ac power setting. If solar panel power is being used, the daily cycle is expected.

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