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Product Overview
Communication Wiring
The controller connects to the field panel by means of a Floor Level Network (FLN)
trunk. Communication wiring connects to the three screw terminals on the controller
labeled "+" (positive), "-"(negative), and "S" (Shield) (Figure 3).
FLN TRUNK
+ -
(SHIELD)
(-)
(-)
(+)
(+)
Figure 3. Communication Wiring (2-wire).
Controller LED Indicators
The controller has seven Light Emitting Diode (LED) indicators (see Figure 1).
LED Type
DO
Transmit
Receive
BST
"Basic Sanity Test"
* Some LED labels and numerals may be hidden by the controller cover.
Temperature Sensors
Room Temperature Sensor
The controller room temperature sensor connects to the controller by means of a
cable terminated at both ends with a six-conductor RJ-11 plug-in connector.
4
e to earth
Terminator
(SHIELD)
Table 2. Controller LEDs.
Label
LED
(if present)*
Number
LED 3 - LED 6
3 - 6
TX
0
RX
1
BST
2
3-Wire Network Interface
-
+
-
120 ohm
½ W
Wirenut
NOTE: When wiring a 3-wire system to a 2-wire system see
the Wiring Guidelines Manual (125-3002) for detailed information.
Figure 4. Communication Wiring (3-wire).
Indication
Indicates the ON/OFF status of the DO
associated with it. A glowing LED indicates that
the DO is energized.
Indicates, when flashing, that the controller is
transmitting information to the field panel.
Indicates, when flashing, that the controller is
receiving information from the field panel.
Indicates, when flashing ON and OFF once per
second, that the controller is functioning
properly.
Siemens Building Technologies, Inc.
+
-
+
Note: = System Common
120 ohm
½ W
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