Siemens BT300 LonWorks, Руководство оператора

Страница: 18 / 180

Chapter 2 - Control Board Terminal Connections
Analog Input Terminal Connections
18 | 180
Siemens Industry, Inc.
Siemens BT300 HVAC Drive DPD01809
Building Technologies 2016-06-07
Figure 5: I/O-Related DIP Switches.
Analog Input Terminal Connections
The BT300 HVAC Drive consists of two analog inputs built on Slot A. When using analog inputs, the DIP switches
must be correctly set and the analog inputs correctly configured before enabling them.
When using an analog input for speed reference, the signal is automatically scaled for Minimum Frequency (P3.3.1)
to Maximum Frequency (P3.3.2) in accordance with the signal range (for example, on a 0 to 10 Vdc signal, 0V
represents Minimum Frequency and 10V represents Maximum Frequency). This scaling can be modified. See the
analog input parameters listed in
Chapter 3
.
Analog Input 1
By default, Analog Input 1 is configured for a 0 to 10 Vdc signal source. The wiring is shown below. See Figure 5
for the location of the AI1 DIP switch. The DIP switch is set to the U (voltage) position at the factory. AI1 Signal
Range (P3.5.2.3) is used for programming the signal range of the analog input. Possible settings are 0 to 10 Vdc/0
to 20 mA or 2 to 10 Vdc/4 to 20 mA.
Figure 6: Analog Input 1 Terminal Connections.
Analog Input 2
By default, Analog Input 2 is configured for a 4 to 20 mA signal source. The wiring is shown below. See Figure 5
for the location of the AI2 DIP switch. The DIP switch is set to the I (current) position at the factory. AI2 Signal