Firmware Version 143 ff. Rev 1.39 03.10.17
Dingo 4040P Reference Manual
12
3.0 LOAD Menu
Low Battery Disconnect
(LSET, LOFF, LON, LDEL)
To prevent battery damage due to over-
discharge, the Dingo has a function which turns
off the load if the battery voltage falls too low.
If correctly configured, equipment connected to
the Load- terminal (the “load”) will be turned off
when the battery voltage falls below the LOFF
voltage for LDEL minutes. Once turned off, the
load will not be reconnected until the voltage
rises above the L ON voltage for LDEL minutes.
The L ON voltage should be set high enough so
that some recharge will have taken place before
reconnection, otherwise the disconnection
process can oscillate.
This feature is optional, and can be disabled
either by connecting the user load directly to
the battery, or by setting LOFF low enough so
that the low battery disconnect function never
activates.
The LOAD indicator at the bottom of the screen
is visible when the low battery disconnect
function wants to disconnect the load. (Note
that other settings can override the function, so
the LOAD indicator does not necessarily mean
that power has actually been disconnected
from the load.) When the disconnect timer has
begun to timeout, the alarm led will flash at a 2
second rate with the led mostly on. If the load
disconnect function operates, then the alarm led
continues flashing but with the led mostly off.
The Low Battery Disconnect function can also
be toggled manually by a long push when in LSET
menu (see Figure 3A).
Name Description
Range
LOFF
Set voltage at which load
disconnects
10.0-12.5 V
LON
Set voltage at which load
reconnects
11.0-16.0 V
LDEL Set delay before
switching on/off
0-15 min
BATV
CHRG
LOAD
IN
OUT
DATA
SET
LINT External
LSET Toggle low battery
LOFF Set voltage at which
L ON Set voltage at which
LDEL Set delay before
load disconnects
load reconnects
disconnect status on/off
switching
Fig. 3A - LOAD Menu
LOAD
The LOAD screen gives real-time total load
current (in Amps). This total is the sum of
the current flowing through the load terminal
(LINT) and any external load current. This may
be current from an external switchblock or an
external current measured using a current shunt
and a DSA.
LINT
From the LOAD screen, a long push displays
LINT (Load Internal). This is the real-time load
current used by equipment connected to the
regulator’s LOAD terminal.
External Load
From the LINT screen, a short push displays
the load current reading from any external
device attached which can measure current. If
the device is a maximum power point tracker
(MPPT) then this device is shown as MPTx,
where x is the device number. Similarly, for
switchblocks the display is SWHx and for shunt
adaptors, SHNx. The device number can be
from 1 to 4 for shunt adaptors and from 1 to
12 for MPPT or Switchblocks. To fit the display,
numbers greater than 10 are given letters. So 10
is A, 11 is b and 12 is C.
This list also allows the user to check that the
Dingo has found or ‘discovered’ all the external
devices attached to the bus. This discovery
process is automatic. If a device is not on the
list and should be, then refer to section 8.4 for
troubleshooting advice.
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