Contemporary Control Systems BAScontrol20 User Manual - Manual (Page 38)

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5.2.6 Analog Outputs (Channels AO1–AO4)
Voltage in the range of 0
–10 VDC (with up to 4 mA of current) can be outputted by
assigning analog outputs. Configure an output using a web browser. For DC
voltage, the output voltage is applied to point A with respect to C (common).
Any channel AO1–AO4 can be used to provide an analog voltage output. The
BACnet type will be Analog Output. To configure an analog output:

On the Main Page ( Figure 13 ), click a title link from among AO1–AO4.

Under BAS Channel Configuration (lower) section of the new screen that
appears ( Figure 24 ), the Channel Type will be Analog Output (read-only).

In the BACnet Object Configuration (lower) section of the screen, all items
are as described in Section 5.2 above
— but Units defaults to VOLTS.

Attach your device to the pair of BASC20 pins for the chosen channel
— so
that the more positive connection is to pin A and the more negative to pin C.
Figure 24
— Analog Output Configuration