Selecting Terminal Functions And Isolating Digital Inputs From Ground With Dip Switches - Siemens BT300 Installation Instructions Manual

Chapter 5 - Control Unit
Control Terminals and DIP Switches
52 | 82
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Building Technologies
Selecting Terminal Functions and Isolating Digital Inputs from
Ground with DIP Switches
Current/Voltage Selection
The terminals in Figure 46 [➙ 52] allow for three functional selections (current/voltage
reference signal) each with
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.
See Figure 46 [➙ 52] to locate the switches and make appropriate selections for your
requirements.
Siemens BT300 HVAC Drive Installation
Instructions
DIP switches
. The switches have two positions: left (current
DPD01148
2016-06-28