Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as
design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners.
© 2006 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
+ 1 847-215-1000
Your feedback is important to us. If you have
comments about this document, please send
them to
Document No. 155-735
Printed in the USA
Page 10
Wiring Diagrams
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
GND operating mode changeover
Figure 13. RDU20U Wiring Diagram.
Figure 14. RDU50U Wiring Diagram.
Figure 15. RDU50.2U Wiring Diagram.
D1, GND Signal input for potential- free operating mode changeover switch
1
0 to 10 Vdc output
2
Heat/cool changeover sensor input
3
Measuring neutral
4
Remote temperature sensor input
5*
Ground for control signal
6*
Operating voltage, 24 Vac Neg
7
Operating voltage, 24 Vac Pos
* 5 and 6 are connected internally
Dimensions
Figure 16. Controller and Base Plate Dimensions in Inches (Millimeters).
