Installation Instructions
Chapter 5 - Control Unit
Control Terminals and DIP Switches
53 | 82
Siemens Industry, Inc.
Smart Infrastructure
Siemens BT300 HVAC Drive
Installation Instructions
DPD01148
2019-05-29
Selecting Terminal Functions and Isolating Digital
Inputs from Ground with DIP Switches
Current/Voltage Selection
The terminals in Figure 46 [➙ 53] allow for three functional selections
(current/voltage reference signal) each with
DIP switches
. The switches have two
positions: left (current signal) and right (voltage signal). See the following figure for
the switch locations and to make appropriate selections for your requirements.
Figure 40: DIP Switches.
Bus Termination
If necessary, the bus termination can be set with the respective DIP switch. Locate
the switch under the control cover of the drive and turn the switch for the RS485
bus termination resistor to position ON.
Figure 41: Bus Termination.
Isolating Digital Inputs from Ground
The digital inputs (terminals 8-10 and 14-16) on the standard I/O board can also be
isolated from ground by setting the DIP switch on the control board to position
OFF.