Rockwell Automation MD65 Profibus Communication Card - Manual (Page 22)

3-6 PROFIBUS Communications Module
Step 5. Connect the PROFIBUS cable to the module, secure it
with the two screws on the connector, and route it through
the bottom of the MD65 drive. See figure 3.3.
Note: The screws on some connectors tie the PROFIBUS
cable ground/shield to the metal of the socket. In some
cases, PROFIBUS will not operate correctly without this
connector.
Keep communication wiring away from high noise
sources such as motor cables.
Step 6. Depending on the switching frequency of the MD65, it is
optional to use the ferrite cable clamp around the
communication cables next to the D-Sub connector, to
reduce high frequency emission. See figure 3.4.
4 RTS
5 GND BUS Isolated GND from bus
6 +5V BUS Isolated +5V from bus
7 Not connected
8 A-LINE Negative RxD/TxD according
to RS485 specification
9 Not connected
Table 3.4 – MDCOMM-PBUS DB-9 Pin Layout (Continued)
Terminal Signal Function
Figure 3.4 – Optional Clamp-On Ferrite Cable Clamp