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
See Figure 46 [➙ 53] to locate the switches and make appropriate selections for
your requirements.
I/O Cabling and Fieldbus Connection
The AC drive can be connected to fieldbus either through RS485 or Ethernet. The
connection for RS485 is on the basic I/O board (terminals A and B) and the
connection for Ethernet is under the drive cover, left to the control keypad. See the
following figure.
Figure 42: Ethernet and RS-485 Connections.
Prepare for Use with Ethernet
Ethernet Cable Data
Table 20: Ethernet Cable Specifications.
Connector
Shielded RJ-45 connector;
NOTE: Maximum connector length is 1.57 in (40 mm).
Cable type
CAT5e STP
Cable length
Maximum 328 ft (100 m)