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Rockwell Automation Publication 1606-RM109A-EN-P - August 2020
Power Supply —12V, 10 A, 120 W, Single Phase
Charging of Batteries
The power supply can be used to charge lead-acid or maintenance free VRLA
batteries. Instructions for charging batteries:
•
Ensure that the ambient temperature of the power supply is below 40 °C
(104 °F).
•
Use a 15 A or 16 A circuit breaker or a blocking diode between the power
supply and the battery.
•
Ensure that the output current of the power supply is below the allowed
charging current of the battery.
•
The return current to the power supply is typically 8mA. This return
current can discharge the battery when the power supply is switched off
except in case a blocking diode is utilized.
•
Set the output voltage, measured at no load and at the battery end of the
cable, very precisely to the end-of- charge voltage. Set the output voltage,
measured at no load and at the battery end of the cable, very precisely to
the end-of-charge voltage. The voltage should be set to:
- 13.9V at 10°C(50 °F) ambient temperature
- 13.75V at 20°C (68 °F)ambient temperature
- 13.6V at 30°C (86 °F) ambient temperature
- 13.4V at 40 °C (104 °F) ambient temperature
Series Operation
Devices of the same type can be
connected in series for higher
output voltages. It is possible to
connect as many units in series as
needed, providing the sum of the
output voltage does not exceed
150V DC. Voltages with a potential
above 60V DC must be installed with
a protection against touching.
Avoid return voltage (for example, from a decelerating motor or battery) which
is applied to the output terminals.
Keep an installation clearance of 15 mm (.60 in.) (left / right) between two
power supplies and avoid installing the power supplies on top of each other.
Do not use power supplies in series in mounting orientations other than the
standard mounting orientation.
Pay attention that leakage current, EMI, inrush current, harmonics will
increase when using multiple devices.
