Cameron NUFLO 1141C, User Manual

Page: 89 / 120

Appendix A: Specifications
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Sealed Lead Acid Battery 12 VDC System 6 VDC System
RTU shut down 10.5 VDC 5.6 VDC*
RTU restart 11.0 VDC 5.9 VDC*
Linear temperature coefficient –23.6 mV/°C –11.8 mV/°C
Float Charge Voltage
At –20°C 15.4 VDC 7.68 VDC
At 25°C 14.1 VDC 7.05 VDC
At 50°C 13.4 VDC 6.7 VDC
Bulk Charge Voltage
Float voltage plus 0.9 VDC Float voltage plus 0.45 VDC
Over Charge Voltage 15 VDC 7.5 VDC
Trickle Charge Voltage 10.2 VDC 5.1 VDC
* For order code input options B1 and M1, RTU shutdown is 6.1V and restart is 6.4V.
DC Input
A DC input accepts power from an external current-limited DC power source connected to the power
terminals.
Input Voltage 6 to 28 VDC
Input Current Limit 10A maximum
Power Management Shuts down at 5.3 VDC
Battery Charge Indicator
As a battery is charged, it progresses through up to four stages or “states.” The LED in the upper left
corner of the circuit board indicates the state of the battery charge by the frequency of blinks it emits.
The table below shows how the blink pattern of the LED corresponds to the state of the voltage
charge. The faster the LED blinks, the lower the voltage that is retained by the battery. For example,
when the LED blinks twice per second, the battery is severely discharged and is considered to be in
the “trickle” state. When the LED blinks only once every 5 seconds, it is fully charged and the
controller attempts to maintain that charge.
State V
BAT
(Temp.
Compensated)
CC/CV Programmable
Charger
Bulk Charger LED Blink
Pattern*
Trickle State
(battery recovery)
< VTrickle ON if installed:
V=VoverCharge
I=iTrickle
OFF Twice per
second
Bulk Charge State >VTrickle
<VoverCharge
OFF if bulk charger
installed, otherwise ON:
V=VoverCharge
I=iMax
ON, if installed Once every
2 seconds