InteliCompact
NT
, SW version 2.1
InteliCompact-NT-2.1-Reference Guide.pdf, ©ComAp – May 2015
For connection with a 12 V DC power supply, the InteliCompact
NT
includes internal capacitors that
allow the controller to continue operation during cranking if the battery voltage dip occurs. If the battery
voltage is 10 V before the dip and it recovers to 7 V within 100 ms the controller continues operating.
During this voltage dip, the controller screen backlight may turn on and off but the controller keeps
operating.
It is possible to further support the controller by connecting the external capacitor and separating
diode or I-LBA module:
+
-
T1A
+
-
+
-
D
C
+
Relays
Controller
Starter
Battery
12 VDC
The capacitor size depends on the required time. It shall be approximately in the thousands of
microfarads.
The capacitor size should be 5000 microfarad to withstand a 150 ms voltage dip under the following
conditions:
Voltage before dip is 12 V, after 150 ms the voltage recovers to the min. allowed voltage, i.e. 8 V.
HINT:
Before the battery is discharged the message "Low BackupBatt" appears.
Or by connecting a special I-LBA Low Battery Adaptor module:
+
-
T1A
+
-
+
-
Relays
Controller
Starter
Battery
12 VDC
I-LBA
+ +
-
-
The I-LBA module ensures a min. 350 ms voltage dip under following conditions:
ï‚· Communication and extension plug-in modules are connected.
ï‚· Voltage before dip is 12 V and after 350 ms the voltage recovers to the min. allowed voltage
5 V.
ï‚· The I-LBA enables controller operation from 5 V DC (for 10 to 30 seconds).
 The wiring resistance from the battery should be up to 0.1 Ω for proper function of the I-LBA.
HINT:
I-LBA may not eliminate voltage drop when used with the low temperature (-40 °C) version of the
controller and the display heating element is on (below 5 °C). The current drain of the heating element
exhausts LBA capacitors very fast.
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