
© 2015 Sensata Technologies
Operation
32
BULK
(blue)
ABSORB
(yellow)
FLOAT
(green)
Description
OFF
ON
OFF
Absorb Charge Stage
– Charger is
in Constant Voltage stage and begins
after the bulk voltage is reached. The
DC charging current will taper down
in order to maintain the battery at the
absorb target voltage
1
.
OFF
Blink
(x1/sec)
3
OFF
Charger Back-off
(in Absorb Charge
mode) – Charger is in Charger Back-
off
2
, limiting charging current to the
battery.
OFF
OFF
ON
Float Charge Stage
(in Float Charge
mode) – Float Charge occurs at end
of absorb charging time—reduces the
charge voltage to maintain the batteries
at the
fl
oat target voltage
1
.
OFF
OFF
Blink
(x1/sec)
3
Charger Back-off
– Charger is in Float
Charge mode and in Charger Back-off
2
,
limiting charging current to the battery.
OFF
OFF
Blink
(x2/sec)
3
Full Charge Stage
– Full Charge stage
turns the charger off and monitors battery
voltage to determine when to continue
charging. After four hours in Float Charge
mode, charger goes to Full Charge mode.
If battery voltage drops to a low level
(12.7 VDC), the charger automatically
initiates another
fl
oat charge.
1st
ON
2nd
ON
3rd
ON
Equalize Charge Stage
– Charger
is in the Equalize Charge stage,
regulating the current to maintain the
battery at the equalize target voltage
1
.
Note: Each charge status LED indicator
comes on quickly in sequence.
Note
1
:
Target Voltage – The temperature compensated voltage regulation
set-point. The battery will be regulated to the voltage setting determined
by the active charge stage (i.e., Absorb, Float, or Equalize) and the Battery
Type DIP switch setting; and includes any voltage increase or decrease
based on the temperature around the BTS.
Note
2
:
Charger Back-off occurs if: 1. The FET or internal temperature is
very hot (the charger reduces the charge rate to maintain temperature); or,
2. The AC input voltage has fallen below 85 VAC (the charger reduces the
charge rate to help stabilize the incoming AC voltage).
Note
3
:
There is a two-second pause between each blink sequence.
Example: Blink (x2 sec) means the LED blinks twice within a second and
then is off for 2 seconds—this sequence continues while in this status.