Subpage of CanBus
[VEMS STM32 Aim to CAN] adapter pinouts:
DSUB9 male (+5V supply and RS232)
- DSUB9/pin2
- DSUB9/pin3
- DSUB9/pin5 GND (verify connectivity to other GND-s eg. EC36/26)
- DSUB9/pin9 +5V supply (verify with DVM DC voltage measurement)
- <50mA supply consumption.
Note that this
- pinout is similar as a PC RS232 port, with notable difference that DSUB9/pin9 = +5V supply is needed),
- plugs into standard 2nd RS232 DSUB9 female connector, see GenBoard/Manual/CommHardware
CAN cable
- CAN_H → white
- CAN_L → brown
- CAN cable shield not connected in ECU.
Notes:
- the wire colors (white is CAN_H) similar default as [v3 internal CAN] used for [BMWS65]
- please measure resistance with DVM between CAN_H and CAN_L (not connected to the bus):
- infinite (apply 120 Ohm if termination is needed), or simply connect to the CAN bus that is already terminated on both ends. (default unless requested otherwise)
- 120 Ohm : terminated (connect to one end of the bus)
- 240 Ohm : apply 240 Ohm if 120 Ohm termination is needed, or another 240 Ohm termination device (mostly used in BMW S65, otherwise uncommon)
In the end, if both ends of the CAN bus is terminated with 120 Ohm resistors (or devices with 120 Ohm resistor internally), DVM will measure 60 Ohm (devices on the CAN bus powered off).
DSUB15 male pinout (analog inputs)
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