Rockwell Automation RECOMM-IBUS Interbus Communications Module - Manual (Page 20)

3-6 Interbus Communications Module
Step 2. Apply power to the SP600 drive. The module receives its
power from the connected drive. When you apply power
to the product for the first time, the status indicators
should be green or off after initialization. Refer to chapter
8, Troubleshooting the Interbus Module and Network, for
more information.
Step 3. Apply power to the master device and other devices on
the network.