Operating Instructions

Hardware
Siemens Building Technologies, Inc. 2-7
The TRIACs on the controller board switch the hot leg of the 24 Vac supply voltage to the
“NO” terminal when energized. The common leg of the 24 Vac supply voltage is provided
directly to the “C” terminal. Figure 2-8 and
Figure 2-9
show actual connections and an
equivalent schematic diagram.
Figure 2-8. Connection and Equivalent Schematic Diagram
for Pneumatic Actuation.