Installation Instructions

Document No. 550-163
Installation Instructions
June 18, 2015
Siemens Industry, Inc. 9 of 11
Wiring Diagram
NOTE:
The controller’s DOs control 24 Vac
loads only. The maximum rating is 5
VA for each DO. An external
interposing relay is required for any of
the following:
• VA requirements higher than the
maximum
• 110 or 220 Vac requirements
• DC power requirements
• Separate transformers used to power
the load
(for example part number 540-147,
Terminal Equipment Controller Relay
Module)
Application 6630 VAV Cooling Only Wiring Diagram.