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ADwin
9.2 CAN Interface
The CAN interfaces 1 and 2 can be operated individually. Depending on your
requirements, you can order both interfaces either as high-speed or low-speed
version. Switching in operation is not possible.
9.2.1 Hardware Description
The connections of the interfaces 1 and 2 are located on the 9-pin DSUB con-
nector:
– Interface 1: Connector (male) CAN 1.1 and connector (female) CAN 1.2.
The pins of the connectors are internally connected with each other.
– Interface 2: Connector CAN 2.
The pinouts for CAN "High speed" and "Low speed" are different.
CAN
Male connectors
Bus
CAN 1.1, CAN 2
High
speed
CAN 1.1
Low
speed
Abb. 28 – CAN: Pinbelegungen
Both interfaces have their individual CAN-GND potential; the potentials are
both galvanically isolated from each other as well as from the mass potential
(GND) of the enclosure.
The low speed version requires an external power supply of 12V DC to run the
CAN controller. The power must be supplied for each interface separately.
If the CAN interface functions as the physical termination of a high-speed CAN
bus, it must be terminated with a 120Ω resistor (only the first or the last CAN
node). CAN nodes, which are not positioned in an end-location, must not be ter-
minated.
If termination is required for one (or both) interfaces, the pins CAN(+) and
CAN(-) must be connected by a resistor of 120Ω.
ADwin-Gold USB / ENET, manual version 3.8, October 2005
1
2
3
4
5
6
7
8
9
CAN 2
&
(male)
1
2
3
4
5
6
7
8
9
Female connector
CAN 1.2
5
4
3
2
1
9
8
7
6
CAN 1.2
(female)
5
4
3
2
1
9
8
7
6
CAN add-on
Power supply
(Low speed only)
Bus Termination
(High speed only)
35
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