Owner`s manual

VANNER Incorporated Typical Applications
70-Series Power Management System OWNER’S MANUAL
7
Undervoltage Protection Override (Jump Start Override) (Terminal F)
This is an input, which overrides the low battery undervoltage lockout if the 24V bus is above
19VDC. The intent is to detect an attempted jump start so that the 12V bus can be powered in the event
of a totally flat battery, and a 12V load present, with a two wire jump (12V battery does not have a jump
connection, only the 24V and ground). If this line is allowed to float it will not be activated, to activate this
feature this line should be tied to the 24V bus.
Equalizer Fault Output (Terminal G)
This is an indicator output with the same characteristics as the other monitor outputs, they can be
wired together for a single warning, or discretely wired for more detailed information. This output is a pull
down whenever an Equalizer fault is detected. There is logic in the monitor, which examines Equalizer
behavior to decide if there is a fault. This is a significant improvement over previous indicators used in the
industry, which simply show if the Equalizer is active. Those indicators give rise to false replacements if,
for example, the batteries are balanced and the Equalizer stops running.
Equalizer Ignition Input (Terminal H)
This input allows the Equalizer to be turned on and off by an external control signal, such as the
ignition line. This line should be pulled low to turn off the unit, if it is left to float the Equalizer is enabled. If
this line is tied to the ignition there will be enough additional load on the ignition line to perform the “pull
down” function.
Remote Sense (Terminals M, N, and P)
Remote Sense allows remote sensing of battery voltage. This makes the Equalize function
insensitive to voltage drops in the cables, fuses and connections. Remote Sense allows flexibility of
configuration in the Equalizer power connection wiring and more freedom in Equalizer location.
When using Remote Sense the Equalizer DC power cables can be the minimum size listed in the
Wire Size Table for a given Equalizer rating, up to four times the distance listed. This sets a maximum
voltage drop of 0.4V which is reasonable from efficiency and fault detection considerations.
There are three inputs for the Remote Sense function, +24, +12, and Ground. The Remote Sense
wires can be 16 or 18AWG as the input impedance is high. Select the wire gauge based on mechanical
strength requirements. The Remote Sense wires each should have appropriately sized fuses for
protection in case the wires become damaged or shorted. It may not be necessary to connect the Remote
Sense wires directly to the battery. If the vehicle battery cables are brought to a distribution point from
where connections are made to the rest of the vehicle, it is acceptable to connect the Remote Sense
wires here. Sensing at the distribution point should not introduce a significant error since most of the time
the battery cables are only carrying battery charging current. As the battery become charged and the
charging current becomes minimal there will be almost no error.
A
B
C
D
E
F
G
H
J
K
L
M
N
P
+
12 V
Battery A
-
+12 Volt
Loads
(Radio)
+24 Volt
Loads
+
12 V
Battery B
-
+
24V
Alt
-
VANN-Guard
+24V
GND
+12V
F1
F2
+12V
+24V
Alarm Low
Monitor Ignition Input
Imbalance Alarm
Equalizer Fault
Ground
Alarm High
Undervoltage Protection Override
Equalizer Ignition Input
Unused
Unused
+24V Battery Remote Sense
+12V Battery Remote Sense
Battery Ground Remote Sense
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Deutsch Connector Pin Out
+ Voltage for
Lamps
+ Voltage for
Lamps
+ Voltage for
Lamps
+ Voltage for
Lamps
Battery Monitor
Control Input: +24VDC
Output: 0.375 Amps (per term.)
Trip Levels: all have 5 second Delay)
Remote Sense Fault
+ Voltage for
Lamps