Rockwell Automation 1606-XLP60BQT Power Supply Reference Manual - Manual (Page 18)

All parameters are specified at 12V, 4.5A, 230Vac input, 25°C ambient and after a 5 minutes run-in time unless noted otherwise.
18 Rockwell Automation Publication 1606-RM016A-EN-P — February 2014
Bulletin 1606 Switched Mode Power Supplies
20.3. Charging Batteries
The power supply can be used to charge 12V lead-acid or maintenance free batteries.
Instructions for charging batteries (float charging):
a) Ensure that the ambient temperature of the power supply is below 45°C
b) Set output voltage (measured at no load and at the battery end of the cable) very precisely to the end-of-charge
voltage.
End-of-charge voltage 13.9V 13.75V 13.6V 13.4V
Battery temperature 10°C 20°C 30°C 40°C
c) Use a 6A circuit breaker (or blocking diode) between the power supply and the battery.
d) Ensure that the output current of the power supply is below the allowed charging current of the battery.
e) The return current to the power supply (battery discharge current) is typical 6mA when the power supply is
switched off (except if using a blocking diode).
20.4. External Input Protection
The unit is tested and approved for branch circuits up to 20A. An external protection is only required if the supplying
branch has an ampacity greater than 20A. Check also local codes and local requirements. In some countries local
regulations might apply.
If an external fuse is necessary or utilized, minimum requirements need to be considered to avoid nuisance tripping of
the circuit breaker. A minimum value of 6A B- or 3A C-Characteristic breaker should be used.
20.5. Parallel Use to Increase Output Power
1606-XLP60BQT power supplies can be paralleled to increase the output power.
This power supply does not include the capacity to balance the load current
between the power supplies. Usually the power supply with the higher
adjusted output voltage draws current until it goes into current limitation. This
causes no harm to this power supply as long as the ambient temperature stays
below 45°C. The 1606-XLP60BQT can also be paralleled with other power supplies
with 12V output voltage. The output voltages of all power supplies must be
adjusted to the same value (±100mV).
A fuse or diode on the output of each unit is only required if more than three units are connected in parallel. If using
a fuse or circuit breaker, choose one with approximately 150% of the rated output current of one power supply. Keep
an installation clearance of 15mm (left / right) between two power supplies and avoid installing the power supplies on
top of each other. Do not use power supplies in parallel in mounting orientations other than the standard mounting
orientation (input terminals on the bottom and output terminals on top of the unit). Be aware that leakage current,
EMI, inrush current and harmonics will increase when using multiple power supplies in parallel.
Unit A
AC
DC
Unit B
AC
DC
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+
-
+
Load
+
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