Switching On The Bus Termination - ABB FDNA-01 User Manual

Standard open-style screw connector:
+24 V
Network
0 V
power supply

Switching on the bus termination

The adapter module does not provide bus termination. The
DeviceNet network should be terminated at both ends of the trunk
cable with a 121 ohm, ¼ W, 1% metal film resistor. Connect the
resistor between the two signal wires (CAN_H, CAN_L) on the
DeviceNet cable, as shown in the figure below.
Scanner
121 Ω
1%
Metal Film
1/4 W
Further information on the DeviceNet protocol is available at
www.odva.org.
...
Node 1
CAN_H
CAN_L
Electrical installation 31
V-
CAN_L
SHLD
CAN_H
V+
Node n
121 Ω
1%
Metal Film
1/4 W
FDNA
X1