DC Power Technologies FS3 Version 3 - Technical Hardware Manual - Manual (Page 9)

Page | 8
4. Hardware Description
Three base models make up the FSx modular charger series. For
each of the FS3, FS5 and FS9, a low and high output voltage model
cover the battery voltage range. Logical model name modifiers
allow differentiation, shown in the table below.
FS3 FS3LU Low voltage, UL Listed
FS3LN Low voltage, Non-UL
FS3HN High voltage, Non-UL
FS5 FS5LU Low voltage, UL Listed
FS5HN High voltage, Non-UL
FS9 FS9LU Low voltage, UL Listed
FS9HN High voltage, Non-UL
The FS5 and FS9 utilize a common larger chassis - only internal
components differ between the two - while the FS3 takes a more
compact form, suited to single-person handling.
The principal components of the FSx series comprise a number of
paralleled charger modules each monitored and controlled by a
system level microprocessor. The charger output characteristics are
controlled depending on the charge requirements, battery type and
state of charge.
The following sections describe the primary and auxiliary
components of the FSx series, including where relevant, detail on
model-specific features.
Housing
The FSx charger housings are 1.2 mm electro galvanized and
powder coated steel. An internal chassis provides support for
charger modules as well as primary and auxiliary circuitry. The
housing front contains the charger display, status LEDs, push-
buttons, and air filter assembly.
Access to internal charger circuitry for service is gained by
removing exterior panels.
Note: Before exterior housing panels are removed the charger
must be isolated from both the AC supply and battery.