Theory Of Operation; Receiving And Installing The Charger - Pivot ATLAS User Manual

Number of iPMs
1
2
3
4
Figure 1-2: Number of iPMs and the Corresponding Maximum System DC Output Current

2. THEORY OF OPERATION

The charger has an "IE" profile which is (1) a constant-current bulk/start phase followed by (b) a c onstant-
voltage float phase. When the charger is first started, if the battery pack voltage is below the charger float
voltage value, it will output a constant current in the bulk phase. The constant current value is controlled by
the "Max DC Output Current" setting available via the charger web server using the Ethernet port.
When the battery pack nears the charger float voltage value, the charger will transition from the bulk p hase
into the float phase. The output current will dec rease in order to maintain a constant float voltage. The
charger float voltage value is controlled by either (1) the "NUMBE R OF CELLS" and "VOLTS PER CELL"
rotary switches on the UIM or (2), if the "NUMBE R OF CELLS " rot ary switches are set to "00", the "Number of
Cells" and "Float Voltage Per Cell" settings available via the charger web server control the float voltage value
(see Section 11.3 for valid ranges). The constant float voltage will be maintained indefinitely to keep the
battery pack fully charged.
The charger web server, which is detailed in Section 11, includes other settings, such as battery temperature
compens ation, that can be adjusted per the requirements of the battery pack and o verall system.

3. RECEIVING AND INSTALLING THE CHARGER

WARNI NG: NEV ER PLACE ANYTHI NG ON TOP OF THE CHARGER W HILE OP ERATI NG. DAMAGE
TO THE CHARGER OR BATTERIES COULD OCCUR.
WARNI NG: THE CHARGER MUST BE S ET UP FOR THE PROP ER US ER SP ECIFICATIONS BEFORE
STARTI NG THE INITIAL CHARGE.
WARNI NG: CHARGERS CAN IGNITE FLAMMABLE MATERI ALS AND VAPORS. DO NOT US E NEAR
FUELS, GRAIN DUST, SOLV ENTS, THINNERS, OR OTHER FLAMMABLES.
WARNI NG: REPLACE WORN, DAMAGED, OR CUT ELECTRICAL CORDS AND CONNECTORS
IMMEDI ATELY.
Proper installation of the charger is important in order to achieve good charger performance and to prevent
damage to the charger and batteries.
When a charger is received, a check for possible in -transit damage should be made. If any damage is found,
it should be reported as a claim to the carrier.
The dimensions for the charger and mounting brackets are shown in Figure 3-1 (4-slot chassis) and Figure 3-
2 (2-slot chassis).
To permit free air flow for convention cooling, allow 2 inches (2") minimum between t he charger sides and
other equipment and 4 inches (4" ) minimum on top of the charger. Do not mount the charger above other
heat generating equipment.
The charger can be mounted on a shelf, countertop, floor, wall, or rack. The charger case includes four (4)
cushioned feet that are designed to prevent marring of mounting surface and to absorb vibration.
charger includes adjustable mounting brackets that provide highly flexible mounting options . See Figure 3-1
(4-slot chassis) or Figure 3-2 (2-slot chassis) for details.
ATLAS
Maximum System DC Output Current (A)
12 Vdc iPMs
20
40
60
80
6 of 44
24 Vdc iPMs
10
20
30
40
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