Manual

Installation 10 (22)
5.2.3 Connecting the CAN Fieldbus
The assignment of the fieldbus connectors (D-Sub 9 and RJ45) is in accordance to CiA 303-1.
The shield of the CAN connector is connected to CAN ground via a 1 MΩ resistor and a 10 nF
capacitor. USB_shield is connected to CAN_shield via a 4.7 nF capacitor. The shields of the CAN
connectors of the variants professional and automotive are connected directly together.
For non galvanic decoupled interfaces, fieldbus ground and computer ground are at the same
potential.
For best noise immunity connect the shields of the CAN cables directly to the device ground.
Pin Allocation of USB-to-CAN
V2
Compact and Embedded
Pin No.
Signal
RJ45
D-Sub 9
CAN high
1 7
CAN low
2 2
CAN GND 3, 7 3, 6
Other pins are not connected.
Pin Allocation of USB-to-CAN
V2
Professional
RJ45, Pin No.
Adapter cable
Signal
CAN 1 CAN 2
D-Sub 9, Pin No.
CAN high
1 1 7
CAN low
2 2 2
CAN GND 3, 7 3, 7 3, 6
Other pins are not connected.
Pin Allocation of USB-to-CAN
V2
Automotive
RJ45, Pin No. Adapter cable
Signal
CAN 1 CAN 2
D-Sub 9, Pin No.
CAN high
1 1 7
CAN low
2 2 2
CAN GND 3, 7 3, 7 3, 6
CAN high LS
4
-
4
CAN low LS
5
-
1
LIN
-
6 5
VBAT
LIN
-
8 9
► If necessary install a bus termination (see CAN Bus Termination, p. 14).
► Observe pin allocation.
► Connect the CAN fieldbus connector to the CAN fieldbus.
► Start the CAN bus monitor on the computer.
► In the CAN bus monitor adjust USB-to-CAN
V2
properties according to the fieldbus
characteristics.
► Start the CAN bus monitor communication.
→ Received CAN messages are shown in the receive window of the CAN bus monitor.
→ CAN LED is green flashing with each CAN message.
USB-to-CAN
V2
User Manual
4.01.0280.20000 2.7 en-US