Electrical Description of EGM
Status September 2003 (EvoBus-Service / AFT) Page: 48 of 83
3.2.3 Passive sensors
Requirement:
Temperature sensors based on NTC resistors are used as passive sensors. The voltage drop at the sensor
resistor, which is supplied with current by a pull-up resistor, is used for evaluation. These inputs are short-
circuit-proof and diagnosable like the active inputs.
The following temperatures and pressure are to be detected by the sensors.
3.2.3.1 Temperature sensors
The following information refer to the sensor input circuit.
Oil temperature
Temperature sensor data for RV = 1 KΩ ±1.4 °C (at 100 °C)
T in °C
-40 -20 -5 10 70 90 115 130
U in V
4.9 4.71 4.41 3.96 1.5 0.97 0.56 0.41
R
NTC
in Ω
49000 16241 7475 3808 429 241 126 89
Coolant temperature
Temperature sensor data RV = 1 KΩ ±1.4 °C (at 100 °C) or ±1.7 °C (at -20 °C)
T in °C
-40 -20 -5 10 70 90 115 130
U in V
4.9 4.71 4.41 3.96 1.5 0.97 0.56 0.41
R
NTC
in Ω
49000 16241 7475 3808 429 241 126 89
Charge-air temperature, Beru for 400 series
Temperature sensor data for RV = 2.2 KΩ ±1.5 °C (at 40 °C)
T in °C
-40 -20 0 35 65 80 105 130
U in V
4.79 4.43 3.61 1.96 0.95 0.64 0.36 0.17
R
NTC
in Ω
50000 17000 5700 1420 515 324 170 80
Gas temperature, Woodward 400 series
Temperature sensor data for RV = 2.2 KΩ ±1.5 °C (at 40 °C)
T in °C
-40 -25 0 20 40 70 100 120
U in V
4.89 4.74 4.10 3.02 2.21 0.82 0.39 0.22
R
NTC
in Ω
100700 40000 10000 3350 1740 430 185 100
Exhaust-gas temperature, Epiq TS-200
Temperature sensor data for RV = 1 KΩ ±20 °C (at 1000 °C)
T in °C
-40 0 200 400 600 700 800 1000
U in V
0.73 0.84 1.29 1.64 1.91 2.02 2.12 2.3
R
NTC
in Ω
170 200 349 488 618 679 738 849
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