Installation Instructions
Chapter 5 - Control Unit
I/O Cabling and Fieldbus Connection
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Siemens Industry, Inc.
Smart Infrastructure
Siemens BT300 HVAC Drive
Installation Instructions
DPD01148
2019-05-29
Figure 46: Connecting the RS-485 Cable.
5. Using the cable clamp included in the delivery of the drive, ground the shield of
the RS-485 cable to the frame of the drive.
Figure 47: Grounding the RS-485 Cable Shield.
6. If the Siemens BT300 HVAC Drive is the last device on the bus, the bus
termination must be set. Perform the following steps:
– Locate the DIP switches to the right of the control keypad of the drive.
– Set the switch for the RS-485 bus termination resistor to the ON position.
Biasing is built in the termination resistor. See also Step 9 in this procedure.
9200.emf
Cable clamp