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User Manual TCM L-4370
Schroder Industries En 57
22.1.6. HDA.SAE Signal 1/2/3/4
The current or voltage range is dependent on the contamination class according to SAE=0.0 – 14.0 (resolution 0.1 class).
Current I SAE class / Error Voltage U
I < 4.00 mA Cable break U< 2.00 V
I = 4.00 mA SAE 0 U = 2.00V
… … …
I = 20.00 mA SAE 14.0 U = 10.00V
If the contamination class is given acc. to SAE, the current I or voltage U can be calculated:
I = 4 mA + SAE class x (20 mA - 4 mA) / 14
U = 2 V + SAE class x (10 V - 2 V) / 14
If the contamination class is given acc. to SAE, the current I or voltage U can be calculated:
SAE class = (I - 4 mA) x (14/16 mA)
SAE class = (U - 2 V) x (14/8 V)
22.1.7. HDA.SAE signal 5 (status)
The current or voltage of the output signal (5) is dependent on the status of the TCM as shown in the table below:
Current I Status Voltage U
I = 5.0 mA The TCM is functioning correctly. U = 2.5V
I = 6.0 mA Device error / U = 3.0V
The TCM is not ready.
I = 7.0 mA The flow rate is too low. U = 3.5V
I = 8.0 mA SAE < 0 U = 4.0V
I = 9.0 mA No measured value U = 4.5V
(The flow rate is not defined.)
If the status signal is 6.0 / 7.0 / 9.0 mA or 3.0 / 3.5 / 4.5 V, signals 1 to 4 are output with 20 mA or 10 V. Example: