Mercedes-Benz Viano Taxi, Supplement Owner'S Manual

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50
Technical data
Road speed signal
4
The output signal is a route and road speed
signal for the taximeter.
Guaranteed speed range:
2.75 km/h to 250 km/h
Overvoltage protection:
Output is blocked if U > 16.5 V.
Signal output:
Open collector with a high-impedance
pull-up resistor (10 k
Ω
)
External low-impedance pull-down
resistor R
L
=470
Ω
Output current:
25 mA, protected against short circuits
Output level:
Output signal for taximeter
i
The external pull-down resistor R
L
is
contained in the cable set fitted in the
taxi.
!
Special EMC measures must be taken
with larger currents (I
max
=1 A).
HIGH signal U
A
≥
8 volts
LOW signal
1
1 The value depends on the input resistance of the
taximeter (R
Ltax
≥
10 k
Ω
).
U
A
≤
1 volts