3
GENERAL DESCRIPTION
This unit is a parallel charger . It is designed to simultaneously float charge a battery while supporting
or supplementing a parallel load
This model is a two stage, constant voltage battery charger with current limiting, current fold back,
and automatic temperature compensation of the output voltage. It is protected against shorting the
output terminals and reversing the output terminals on a battery. It is equipped with an IEC-320 type
power input module with fuse holder and a spare fuse. A 6'long detachable power cord with NEMA 5-
15P plug is provided for use in North America. Other power cords can be ordered with plugs designed
to mate with power sockets in other countries.
There is an input voltage selection switch located above the input module to select between 115 V~
and 230 V~. The standard output cable is 3' long with insulated boots and spring clips. There is one
indicator light on the front panel. It lights green to indicate when power is applied and, when a bat-
tery is attached, that the charger is in float mode. It lights yellow when the unit is charging the bat-
tery. It lights red to indicate a fault condition (shorted or reversed output connector). The unit has a
full metal enclosure to ensure field reliability.
This unit is designed to automatically switch into a single stage, float charge mode when the battery is
charged. A single stage, parallel charger version is available for keeping a battery fully charged when
used with a permanent or intermittent parallel load. The use of an optional low voltage cut out is rec-
ommend when using parallel loads. This unit is not designed to operate as a standalone power supply.
OPERATING INSTRUCTIONS
Before using this battery charger, make sure it is compatible with your battery. Refer to the ratings on
the battery charger, the specifications in this manual, and your battery documentation. Determine
the battery polarity. Most batteries identify the positive terminal with a "+" sign or the color
red
and
identify the negative terminal with a "-" sign or the color
black
. Connect the red insulated output clip
to the positive battery terminal and connect the black insulated output clip to the negative battery
terminal. If the charger is provided with a polarized connector, make sure your battery connector is
wired to match the output connector.
The input voltage setting is displayed on the selection switch on the back of the unit. If this setting
must be changed, make sure the power cord is disconnected while operating the switch. Operating
the switch while power is applied may cause damage to the switch or charger. Plug the power cord
into a properly grounded outlet which supplies the correct input voltage.
Connect the load in parallel with the battery and charger (note the correct polarity if required by the
load).
There is one indicator on the front panel. It will light yellow when the unit is operating in the constant
current mode at about .75%, or more, of its maximum rated current. In the constant current mode
the unit is not regulating voltage and the battery may not maintain its charge.
This unit should not operate continuously in the constant current mode. It should only go into the
