
Figure  3-30: RS-232 Connection Diagram 
3.4.9.2  CANopen Communication (on the COMM.2 Ports) 
 Notes for connecting the CANopen communication cable:  
 Use 26 or 28 AWG twisted pair shielded cables. For best results, the shield should 
have aluminum foil and covered by copper braid with a drain wire 
 Connect the shield to the ground of the host (PC). Usually, this connection is 
soldered internally inside the connector at the PC end. You can use the drain wire to 
facilitate connection. 
 The male RJ plug must have a shield cover. 
 Ensure that the shield of the cable is connected to the shield of the RJ plug. The drain 
wire can be used to facilitate the connection. 
 Connect a termination 120-ohm resistor at each of the two ends of the network cable. 
Pin Signal  Function  Pin Position 
1  CAN_H  CAN_H busline (dominant high) 
2  CAN_L  CAN_L busline (dominant low) 
3 CAN_GND CAN ground 
4, 5, 8  —  — 
6  CAN_SHLD  Shield, connected to the RJ plug cover 
7 CAN_GND CAN Ground   
Table  3-14: CANopen Cable - Pin Assignments 
 Only one RS-232 port can be 
used at a time. 
Tuba Installation Guide  Installation 
MAN-TUBIG (Ver. 1.3) 
3-39