User guide

1
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.
The PS512M and CH512R also have two 9-pin connectors that provide a null
modem for use in a site, without a datalogger, that connects and powers two
Campbell Scientific peripherals that would normally be connected to a
datalogger. These peripherals are typically modems linking different
communications technologies; e.g., telephone to radio.
2. Specifications
PS12LA, PS512M, CH12R, CH512R
Input Voltage (CHG terminals)
15 to 28 VDC or 18 VAC RMS
Battery Connections
Charging Output Voltage: Temperature compensated float
charge for 12 V Battery
Temperature Compensation Range: -40 to +60ºC
Charging Current Limit: 1.2 Amps typical
Power Out (+12 terminals)
Voltage: Unregulated 12 V from Battery
Current Limited w / 3 A Thermal Fuse:
> 3 A @ < 20°C
3 A @ 20°C
2.1A @ 50°C
1.8 A @ 60°C
Battery Packs
Operating Temperature Range: -40 to +60ºC
Capacity:
PS12LA 7 Amp hours
BP12 12 Amp hours
BP24 24 Amp hours
AC Transformer: CSI Model No. 9591
Input Voltage: 120 VAC
Output Voltage: 18 VAC RMS
Output Current (max): 1.2 Amps RMS
Protection (automatic reset):
85°C thermal reset breaker
UL Approval: UL-1950