IOTA DLS SERIES User manual

DLS SERIES POWER CONVERTER/CHARGER
FOR 36-48V APPLICATIONS
OWNER’S MANUAL
The DLS series power converter/battery charger from
IOTA Engineering converts nominal A.C. voltage to D.C.As
a power supply, its tightly controlled regulation allows the
user to operate any appropriate nominal D.C. load up to
the converter’s rated output current. As a battery charger,
the converter will maintain the battery, delivering its full-
rated current when the battery capacity falls sufficiently
low. The voltage is set to deliver its maximum current for
the necessary period of time that minimizes undue stress
to the battery caused by heating of its cells. This helps to
ensure the longest possible life of the battery. Over time,
as the battery nears its full capacity, the converter will float-
charge the battery to prevent self-discharge of its cells.
PROTECTION FEATURES
The DLS series power converter/battery charger is de-
signed with high quality components to help ensure years
of continuous use.The DLS series is protected by multiple
protection features for a long, trouble-free life.
1) Reverse Battery Polarity Protection. 2) Brown-Out Input
Protection. 3) Over-Current Protection - cycle by cycle peak
limiting as well as rated current limiting to maximize the life
of the converter. 4) Over-Temperature Protection. In addi-
tion, it is designed with a unique “proportional” fan control
circuit. Fan speed is directly proportional to the converter’s
internal ambient temperature.This enables the fan to turn
on and off very slowly, minimizing unwanted fan-starting
noise.
The DLS series power converter/battery charger is war-
ranted from defects in materials or workmanship for two
years from date of retail purchase, and limits the remedies
to repair or replacement. This warranty is valid only in
the continental United States and Canada. For complete
warranty details, contact Customer Service or visit www.
iotaengineering.com
WARRANTY
DC Output Voltage
Output Amperage
Input Watts
Input Voltage Range
Input Voltage Frequency
36V (DC)
20 Amps
900 Watts
108 - 132V (AC)
47-63 Hz
DLS 36-20 Power Converter for 36VDC Applications
DC Output Voltage
Output Amperage
Input Watts
Input Voltage Range
Input Voltage Frequency
40.8V (DC)
18 Amps
900 Watts
108 - 132V (AC)
47-63 Hz
DLS 42-18 Battery Charger for 36VDC Applications
DC Output Voltage
Output Amperage
Input Watts
Input Voltage Range
Input Voltage Frequency
48V (DC)
15 Amps
900 Watts
108 - 132 AC
47-63 Hz
DLS 48-15 Power Converter for 48VDC Applications
DC Output Voltage
Output Amperage
Input Watts
Input Voltage Range
Input Voltage Frequency
54.4V (DC) @ FULL LOAD
13 Amps @ 54.4V
900 Watts
108 - 132 AC
47-63 Hz
DLS 54.4-13 Battery Charger for 48VDC Applications

TWO-STEP VOLTAGE JACK
The two-step voltage jack located on the DLS* allows switching from a long-term
float voltage to a increased quick-charge voltage. When the included dual voltage
plug is inserted in the jack, the voltage increases for faster charging. When the plug
is removed, the voltage drops to rated nominal voltage to reduce battery water loss.
WARNING:To avoid battery damage, remove the Dual Voltage Plug when quick-
charging is complete. NOTE: If the DLS is equipped with an internal IQ4 smart
charger, two-step charging is not needed and the Dual Voltage Jack is disabled.
*Location of jack may vary depending on the model.
There are no components within the DLS unit 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 DLS battery charger/power supply 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.
DLS 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 connecting 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 DLS to the load side. Connect “Chassis Bonding Lug”
on the DLS to vehicle chassis or other grounding source.
120 VOLT A.C. INPUT
Plug the DLS 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 DLS Battery Charger/Power Supply is protected
against reverse polarity on the DC output. If a battery
or the DLS 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. DO NOT OVERTIGHTEN.
CHARGE CONTROL
THE IQ4 LED INDICATOR
(ONLY ON DLS MODELS WITH INTERNAL IQ4)
DLS 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
DLS charger, decreases charge times and insures proper and safe battery charging
without over-charging. The green LED on the fan end of the DLS will indicate which
charging phase the DLS 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-54.4-15 requires the IQ4-54V model charger.
Rev 062509
68357-036