Installation Instructions

Document No. 540-1028
Installation Instructions
October 26, 2016
Siemens Industry, Inc. Page 3 of 5
NOTE:
As a standard grounding procedure,
ensure that a ground wire is connected
directly from neutral of the 24Vac
secondary (the side that connects to
the "C" terminal of the TEC) to earth.
The installation is complete.
Wiring Diagram
CAUTION
The controller’s DOs control 24 Vac
loads only. The maximum rating is
12 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)
Wiring for AI with a 4 to 20mA Sensor.
NOTE:
If the voltage/current switch is set to
current and a 4 to 20mA sensor is
connected to an AI, then special wiring
requirements must be followed.