Document No. 550-139
Installation Instructions
October 26, 2016
Siemens Industry, Inc.
Page 3 of 6
4. Connect the FLN.
5. Connect the point wiring (see
Wiring Diagram
s).
6. Plug the room temperature sensor cable into the
RTS port.
7. Connect the power trunk. DO NOT apply power
to the controller without first consulting the
specialist. This TEC is designed to work with 2-
wire AC power (Neutral and Phase (hot) at 24
Vac +/-20%. Use of the earth terminal is optional
and if used it should be connected to the nearest
earth ground (building steel, conduit or duct work
(if earthed)).)
CAUTION
It is very important that the
neutral that supplies the TEC
be earth grounded at the source
of the 24 Vac power.
Possible erratic equipment
operation or damage if neutral
is left floating.
The installation is complete.
Wiring Diagrams
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)
