Installation guide
Hornet and Bee Installation Guide  Installation 
MAN-HRBEIG (Ver. 1.3) 
www.elmomc.com 
48 
Figure 30: RS-232 Connection Diagram 
3.12.2.  CANopen Communication 
Notes for connecting the CANopen communication cable:  
•  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. 
•  Ensure that the shield of the cable is connected to the shield of the connector used for 
communications. The drain wire can be used to facilitate the connection. 
•  Make sure to have a 120-Ω resistor termination at each of the two ends of the network 
cable. 
•  The Hornet and Bee’s CAN ports are non-isolated. 
Pin (J1)  Signal  Function  Pin Positions 
20  CAN_GND  CAN ground 
21  CAN_L  CAN_L busline (dominant low) 
22  CAN_H  CAN_H busline (dominant high) 
Table 12: CANopen - Pin Assignments 










