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Document No. 129-491
Installation Instructions
October 6, 2009
Installation, Continued
Step 4. Mount Base Plate to Wall.
Step 5. Terminate Wires (See Wiring Diagrams),
Close Cover Terminal Cover and Replace Screw.
Wiring Diagrams
Figure 1. RDU20U.
Page 2 of 7
Step 6. Set DIP Switches.
Step 7. Replace Controller Housing.
Step 8. Tighten Retaining Screws.
The installation is now complete.
1
Operating voltage, 24 Vac negative
2
Operating voltage, 24 Vac positive
3
Operating voltage, 24 Vac positive
4
Control signal, opening, 24 Vac
6
Control signal, closing, 24 Vac
7
Changeover, heat/cool input
8
Measuring neutral (sensors)
9
Remote temperature sensor
D1,
Signal input for potential-free operating mode
GND changeover
S1
Time clock or switch
Y1
Damper or valve actuator
Siemens Industry, Inc.
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