ProgressiveRC DLS-90 IOTA User Manual
Page 2
TWO-STEP VOLTAGE JACK
The two-step voltage jack allows switching from a long-term float voltage of 13.6vdc 
up to 14.2vdc. When the included dual voltage plug is inserted in the jack*, the voltage 
rises to 14.2vdc for occasional fast charging. When the plug is removed, the voltage 
drops to 13.6vdc to reduce battery water loss. 
WARNING: To avoid battery damage,
remove the Dual Voltage Plug when quick-charging is complete. NOTE: If the 
unit is equipped with an internal IQ4 smart charger, two-step charging is not needed 
and the Dual Voltage Jack is disabled.
There are no components within the IOTA Power Converters/Battery Chargers that, in their normal operation, produce 
arcs or sparks. However, all electronic devices have some potential for generating sparks in the event of failure. 
Therefore, never install this device in the same compartment with flammable items such as gasoline or batteries.
INSTALLATION GUIDELINES
MOUNTING LOCATION
The IOTA Power Converter/Battery Charger can be mounted 
in any position within an enclosed or interior compartment. 
Provide sufficient air space to allow unrestricted airflow in 
and around the unit. 
INSTALLATION
Disconnect the positive side of the battery before installation. 
Connect the positive (red) and negative (black) terminal lugs 
to battery or load. Always use the proper size wire based on 
the amperage of the converter and the battery. When con-
necting to a battery, a breaker should be installed within 18” 
of the battery, connecting the battery positive to the line side 
of the breaker, and the IOTA unit to the load side. Connect 
“Chassis Bonding Lug” on the IOTA unit to vehicle chassis or 
other grounding source.
120 VOLT A.C. INPUT
Plug the unit A.C. input cord into a 120 volt 3 wire 
grounded source. See chart for maximum current draw 
and required input voltages.
REVERSE POLARITY FUSES
The IOTA Battery Charger/Power Supply is protected 
against reverse polarity on the DC output. If a battery 
or the unit is hooked up incorrectly, the fuses will blow 
and can be easily replaced. Always use the same size 
and style fuse that came with the converter. To change 
the fuses, use a screwdriver to loosen the screws 
and remove the fuses. Always replace the fuses with 
the same type and rating. After inserting the new 
fuses, tighten the screws firmly. Apply 5 inch-pound 
maximum torque. DO NOT OVERTIGHTEN.
CHARGE CONTROL
THE IQ4 LED INDICATOR
(ONLY ON IOTA MODELS WITH INTERNAL IQ4)
IOTA Models with an internal IQ4 smart-charger give the user the benefit of automatic 
Bulk, Absorption, and Float stage charging. This increases the charging capacity of the 
IOTA charger, decreases charge times and insures proper and safe battery charging 
without over-charging. The green LED on the fan end of the unit will indicate which 
charging phase the IOTA unit is currently in. When the unit is first activated, the LED 
will flash as it reads the number of cells in the battery. The unit will then proceed directly 
to the Bulk charging or Float charging phase depending on the charge status of the 
battery. Use the LED CODE TABLE for reference when checking the LED. Units that 
do not have an internal IQ4 smart-charger can easily install an external IQ4 that plugs 
into the available Dual Voltage Jack. Contact Customer Service for more information.
DLS MODEL*
DLS SERIES M MODEL*
*Actual component locations may vary depending on model.
*Location of the Dual Voltage Jack may vary depending on model.