IQ4 CHARGE CONTROLLER FOR DLS
OWNER’S MANUAL
The IQ4 Charge Controller offers automatic charging control for DLS
Battery Chargers, providing longer and safer use of your system’s
battery. The IQ4 Controller allows the DLS Charger to operate as an
automatic 3-stage “smart charger” that gives the customer the benefit
of Bulk, Absorption, and Float stage charging. Three-Stage Charging
increases the charging capacity of the DLS charger and decreases
the charge time while insuring proper and safe battery charging and
minimizing the possibility of over-charging. The IQ4 monitors the bat-
tery at all times. If the DLS voltage remains in the Float stage for more
than seven days, the IQ4 will automatically enter the Equalization stage
for a predetermined time to help maintain the battery plates, and then
resume float stage charging.
INSTALLATION OF THE EXTERNAL IQ4
DUAL VOLTAGE JACK
IQ CHARGE CONTROLLER
The IQ4 Charge Controller installs by simply plugging the IQ4 cord
into the Dual Voltage jack located on the DLS* (Refer to Figure A).
The IQ4 circuitry is then automatically engaged. Note: the cord pro-
vided is specifically designed for use with the IQ4. Do not use the IQ4
with any cord other than one supplied with the unit.
The LED Indicator on the IQ4 informs the user of the DLS charging
state and the battery charge status. When first activated, the IQ4 will
read the number of cells in the battery and indicate the voltage of the
battery through a number of flashes. Refer to Figure B.
LIT/FLASHING LED - After reading the battery, the IQ4 will initiate
either a Bulk Charge phase or Float Charge phase depending on the
battery’s charge status. When the IQ4 is in the Bulk Charge mode, the
green LED indicator will flash rapidly (approx. 2 flashes per second).
When the Bulk Charge is complete, the IQ4 begins the Absorption
Charge and the LED indicator will flash at a slower rate (approx. 1
flash per second). If, when first activated, the battery is not in need of
charging, the IQ4 will immediately begin the Float Charge phase and
the LED will be remain lit (no flashing). Refer to Figure C for Charge
Stage descriptions.
The LED indicator will remain lit or flashing when the charger is un-
plugged or disconnected from the AC supply (de-energized). During
this time, the IQ4 continues to monitor the battery voltage. If the bat-
tery voltage drops below a pre-determined voltage (Refer to Figure
D for predetermined values), the IQ4 will automatically initiate the
3-Stage Charge (BULK, ABSORPTION, and FLOAT) once the AC in-
put is re-connected.
IRREGULAR FLASHING LED - If the LED is flashing irregularly or
intermittently, then the IQ4 has entered a FAULT state due to an over-
voltage. When this occurs, the IQ4 must be re-set in order to resume
normal operation. Refer to the FAULT STATE instructions on page 2
for re-setting procedures.
LED INDICATOR
FIGURE A. IQ4 INSTALLATION
FIGURE B. LED INDICATOR CHART
*Location of the Dual Voltage Jack may vary depend-
ing on the DLS Model.
FIGURE C. CHARGING STATE FUNCTIONS
BULK
ABSORPTION
FLOAT
EQUALIZATION
The Bulk State charges the battery at the
full-rated output of the charger, reducing
the time it takes to charge the battery.
The Absorption State delivers a constant
charge for a set period of time to ensure that
the battery receives a full and complete charge.
Once the battery has been fully charged, the
Float State maintains a full charge to the battery
while minimizing “gassing.”
If the battery has remained in the Float State for
seven days, the IQ4 automatically provides an
equalization charge to dissolve any sulfate layer
on the battery’s plates and to avoid stratification.
P.O. BOX 11846 TUCSON, AZ 85734
(520) 294-3292 • FAX (520) 741-2837
www.iotaengineering.com
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