Lambda inputs, Wideband, Narrow band – MoTeC M84 User Manual

Page 74: Digital inputs, 72 appendices motec

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72 Appendices

MoTeC

Trigger Levels: Programmable 0 to 15V

Hysteresis: Individually programmable high and low levels.

Lambda Inputs

Wideband

Sensor Type: NTK or Bosch LSU 4.0, 4.2, 4.9

Measurement Range : 0.70 to 32.0 Lambda

Narrow Band

The LA1S and LA2S inputs may be used to measure the voltage of
normal narrow band oxygen sensors.

If closed loop control is to be used then an external 33k ohm bias
resistor from the input to 0V is required to bias the input to
Stoichiometric (0.45V) while the sensor is cold.

Digital Inputs

Suitable for:

Switch to 0V, logic signal and open collector device
(e.g. Hall Switch)

Pullup Resistor:

4700 ohms to 5 V

Voltage Range:

0 to 15 V

Positive Trigger
Threshold:

3.5 V max

Negative Threshold:

1.0 V min

Hysteresis:

0.5 V Min

Filter Time Constant:

22 usec

Trigger Edge:

Programmable

Measurement Methods:

Switched, Speed / Frequency, Period, Pulse Width

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