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cr09_01_2
Tap for DeviceNet at Weld Data Unit
Termination
DeviceNet uses the CAN bus with terminating resistors at each end of the bus. The
terminating resistor should be 120 ohm. This should be connected between CAN_H
and CAN_L on the bus. Midpoint is connected to 0V for the internal CAN bus
(0V_CAN_ext for the external CAN bus) via 47nF capacitors.
Terminating resistors are included in the W8
2
. They can be connected/disconnected
by switch SW1. Only the internal CAN bus has terminating resistors mounted.
Note! When the W8
2
is is located as the last node in the internal bus network, use
termination on the CAN bus:
S Set termination switch SW1 to position “ON”. The CAN bus will be terminated
with 120 ohm at 24AP1.
S With external termination, set termination switch SW1 to position “OFF”.
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