Kendrion Kuhnke Automation GmbH
Construction and Functionality
Econo
41
5.2.4 CAN / CANopen Station (X7), (X8)
CAN is a 2-wire bus that all stations are connected to in parallel. To avoid voltage reflection, verify that the
bus is terminated by a 120 ohm (or 121 ohm) termination resistor at either end. You will need these resistors
even if cables are very short.
Connector CAN1 (X8) has double CAN terminals. If your unit is a bus end point, you may connect a
termination to one of them. The easiest way to do so is to directly attach a wired 120
Ω resistor to the plug
contacts. If your unit is located somewhere along the bus, the spare contacts are used to attach the next
station.
The CAN2 (X7) interface is not electrically insulated. In this case, the next station or the termination must
therefore connect to some other point.
5.2.5 Modbus RTU
