© 2005-2016 Nira Control AB 33
3.12 Aux Inputs
NIRA i7x is equipped with eleven Aux Inputs. All these inputs can be used in
NIRA i7x FlexiPorts
TM
for user defined outputs or compensations.
Two 0-5 Volt Analog input
One 0-12 Volt Analog input
Four Resistance reading 0-32 kOhm
Two Resistance reading 0-3200 Ohm
Two Digital input. Period time and duty is measured
3.12.1 Input Filters
All inputs to NIRA i7x, including the Aux inputs, can be filtered using the
“Advanced” setting in NIRA rk.
Sometimes this is useful when dealing with noisy input signals in order to
improve readability during data logging.
Before applying filtering to MAP, MAT and TPS inputs, make sure that you
have an understanding of the effects of adjusting the filter. These input
signals should normally never need to be filtered.
3.13 Ignition
NIRA i7x is designed to drive multiple ignition coils, either with
built-in (active coil) or external drive electronics (for passive coil).
The ignition output signal from NIRA i7x is a signal between 0 and
5 Volts and triggers on a negative flank, i.e. when the signal goes
from 5 Volts to ground.
NIRA i7x can control the ignition of up to eight cylinders without waste fire.
Ask your NIRA i7x dealer about high performance ignition coils
Ignition Coil Power Supply
Modern active coils consume a great amount of energy during dwell-time. At
the end of the dwell time the current can reach values of nearly 20 Amperes.
With increased rpm the dwell times are overlapping each other and the total
current consumption increases even more. Make sure the coils are supplied
by a sturdy relay with fuse. Connect with appropriate cable dimensions and
well crimped terminals for both supply and ground wires.
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