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Auto
Monitor
User Manual Version 7.22
Page 65 of 70
9. LAYOUT OF ELECTRICAL CONNECTORS AND PLUGS
9.1 Standard connectors
Connectors A, B and D located at the rear of the vehicle unit (VU) are the standard tachograph
connectors. The description of each connector and the associated pins is provided below:
Connector A – Power supply and CAN bus connection
Pin
Description
A1
Permanent power (Po)
A2
Illumination
A3
Ignition
A4
CAN_H
A5
Battery (Negative -)
A6
Ground, GND
A7
CAN_GND
A8
CAN_L
Connector B – Tachograph speed transmitter connection
Pin
Description
B1
Positive supply
B2
Battery (negative -)
B3
Speed signal, real time
B4
Data signal
B5
-
B6
Speed pulse output
B7
Speed pulse output
B8
Distance signal, 4 pulses/m
Connector D – Optional functions
Pin
Description
D1
Status input 1
D2
Status input 2
D3
-
D4
General tachograph warning output
D5
-
D6
Speed pulse output for instrument
D7
Data communication I/O
D8
-