User manual

CAN-CR2xx - Manual, V2.0

Configuration

3.1 Configuration of the bus termination resistors

For each CAN circuit a bus termination resistor can be activated /deactivated by a

DIP switch. Always both positions should be set to ON / OFF.

CAN1 CAN2 CAN3

Default OFF (deactivated) OFF (deactivated) ON (activated)

Table 3-1 Configuration of the bus termination resistors

The bus termination resistors should be activated if the CAN-Repeater is the first

or the last device in the network. The termination resistor value of the total net-

work should be about 60 Ohm (120 Ohm at both ends of the network).

If the bus termination is not correct, transmission problems could happen.

3.2 Configuration of the baudrate

With DIP switch S301 the baudrate of the CAN network is defined. This setting is

necessary, because the internal logic has to detect dominant-lock states (domi-

nant level on CAN bus exceeds the maximum allowed duration).

S301-1

S301-2

S301-3 S301-4 Remark

OFF OFF OFF

Baudrate between 5 kBd and 100 kBd

OFF

OFF OFF

Baudrate between 100 kBd and 500 kBd

OFF OFF

OFF

Baudrate equal or above 500 kBd

(Default)

Table 3-2 Configuration of the baudrate

All combinations not listed in the table aren’t allowed. If such a combination is

set, malfunction of the CAN-Repeater could happen.