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INSTALLATION AND WIRING
24
(3) Connection to a Network
At this point, the inverter must have been installed correctly with the inverter's node
address set (refer to page 47 for node address setting), and the DeviceNet cable
connected to the inverter.
CAUTION
Do not connect cable to the network until told to do so. To sucessfully connect to a
DeviceNet network please follow the below procudures and checks:
1) Check that the inverter power is turned off.
2) Make sure that a terminating resistor is installed at each end of the trunk cable
(across CAN(+) and CAN (-)), as shown in the following figure.
These resistors must meet the following requirements:
1. R = 121
Ω
2. 1% metal film
3. 0.25W
IBM Compatible
Trunk cable
Drop
cable
Connection to a DeviceNet network
Termination
resistor
(121 )
3) Connect cable to network as follows (this is the cable from the inverter to the
DeviceNet network):
(a) If the trunk connector is a DeviceNet sanctioned pluggable or sealed connector,
the connection to the active network can be made at any time whether the
inverter is on or off. The inverter unit automatically detects when the connection
is completed.
(b) If connecting to the network with free wires, power to the network and inverter
should be shut off as a safety precaution in case two or more signal wires are
accidentally shorted together.
4) Check that all connections are completed, and all necessary wires not associated
with DeviceNet are connected to the inverter unit as required by the application.
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