Siemens 125-1957 Controller LED Indicators, Temperature Sensors, Room Temperature Sensor

APOGEE Unit Vent Controller⎯0 to 10V Output Owner’s Manual

TEC0253R2

24 V-AC	DO 1 DO 2				DO 3 DO 4				DO 5
E C H	NO C NO C NO C NO C NO C
	1 2 3 4 5 6 7 8 9 10 11
	1	2	3	4	5	6	7	8	9 10 11 12

COMMON 24 VAC HOT

CONTROLLER POWER WIRING

NOTE: NO EARTH GROUND CONNECTION

Figure 2. Power Wiring.

TEC0470R1

FLN TRUNK

+ - S

(SHIELD)(SHIELD)

(-) (-)

(+)(+)

Figure 3. Communication Wiring.

Controller LED Indicators

The controller has eleven Light Emitting Diode (LED) indicators. See Figure 1. Table 2 lists the type, the abbreviation on the controller, and the indication of each LED.

		Table 2.	Controller LEDS.
LED Type	Label	LED		Indication
	(if present)*	Number
DO	LED 1 to	1 to 8		Indicates the ON/OFF status of the
	LED 8			DO associated with it. A glowing LED
				indicates that the DO is energized.
Receive	RX	9		Indicates, when flashing, that the controller is
				receiving information from the field panel.
Transmit	TX	10		Indicates, when flashing, that the controller is
				transmitting information to the field panel.
Basic Sanity Test	BST	11		Indicates, when flashing ON and OFF once
				per second, that the controller is functioning
				property.

*Some LED labels and numerals may be hidden by the controller cover.

Temperature Sensors

Temperature sensors used with the Unit Vent Controller—0 to 10V Output include an electronic room, mixed air or discharge air temperature sensor.

Room Temperature Sensor

The Terminal Equipment Controller room temperature sensor connects to the controller by means of a cable pre-terminated at both ends with a 6-conductor RJ-11 plug-in connector. See Figure 1 for the location of the room temperature sensor/Man-Machine Interface (MMI) port.

4 Siemens Building Technologies, Inc.