Installation Instructions

Document No. 550-144

October 26, 2016

Siemens Industry, Inc. Page 3 of 8

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

24Vac power.

Possible erratic equipment

operation or damage if neutral is

left floating.

8. Connect the tubing from the air velocity sensor

pickup to the ports on the controller. Connect HI

to HI and LO to LO.

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 20 mA Sensor.