ABB FDNA-01 - Switching on the Bus Termination

Electrical installation 31
Standard open-style screw connector:
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.
Further information on the DeviceNet protocol is available at
www.odva.org
.
4321 5
SHLD
CAN_L
CAN_H
V-
1234
X1
FDNA
5
V+
0 V
+24 V
Network
power supply
Node 1 Node n
121
Ω
CAN_H
CAN_L
Scanner
121
Ω
1%
Metal Film
1/4 W
1%
Metal Film
1/4 W
…