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E-BUS Digital Room Sensor Technical Guide
MOUNTING AND WIRING
5
Mounting
CAUTION:
Do not touch the front face of the sensor while you
are plugging in the modular sensor cable. Touching the front face
of the sensor while plugging in the cable may prevent proper initial-
ization and keep the buttons on the sensor from working properly.
The E-BUS Digital Room Sensor is designed to be mounted to a vertical
2” x 4” electrical box recessed in the wall. If the wall cannot be pen-
etrated, a plastic surface mount box such as those made by Wiremold
TM
may be used to mount the sensor to the wall surface. The Sensor should
be mounted at least 5 feet above the fl oor.
The Sensor is mounted by removing the front cover and fastening the
housing base to the electrical box using the supplied (2)
6 /
32
” x 1” machine
screws. The modular cable is then plugged into the phone jack located on
the circuit board that is mounted on the cover. The cover is then placed
onto the housing base, and the Allen Screw on the bottom of the base is
adjusted to hold the cover in place. A locking screw secures the sensor
to the wall. See
Figure 4 for E-BUS Digital Room Sensor dimensions.
Optional Mounting Plate
Included with the Digital Room Sensor is a mounting plate that
can be used, if necessary, to cover the sensor sheet rock opening.
This mounting plate screws onto the back of the housing base.
The mounting plate is then mounted and covers the recessed space
in the wall. A locking screw secures the sensor to the wall. See
Figure 25 , page 18 for dimensions.
Environmental Requirements
The E-BUS Digital Room Sensor needs to be installed in an environment
that does not exceed a temperature greater than 150°F or less than -30°F
and does not exceed 90% relative humidity levels (non-condensing).
Indoor Reading Range
The E-BUS Digital Room Sensor’s Indoor Reading Range is 40°F to
120°F and 0-100% RH (RH is available on the ASM01820 & ASM02221
models). Its temperature reading accuracy is +/- .8°F, and its RH reading
accuracy is +/- 3%. Its sensor element is the integral communicating
digital sensing device or external Type III Thermistor 10K Ohm @ 77°F.
Outdoor Reading Range
If your E-BUS Digital Room Sensor is set up to read an Outdoor Air
Temperature Sensor, any outdoor air temperature below -40°F will not
appear on the E-BUS Digital Room Sensor’s display.
Important Wiring Considerations
The E-BUS Digital Room Sensors connect to the VCCX2 or VCB-X
Controller using various lengths of EBC E-BUS cable connected between
the controller and the sensor. The EBC E-BUS cables should not run
in conduit with other AC line voltage wiring or with any conductors
carrying highly inductive loads. See
Figure 18 , page 12 for wiring.
Dimensions and Mounting
Figure 4: E-BUS Digital Room Sensor Dimensions
MI
CR
O
C
H
IP
PIC
24HJ
25
6G
P2
06
4.55”
2.80
Front View
Side View
Back View
0.69
1.1
1.81
1.87
0.49
Remote Thermistor
Sensor Connector
0.81
+12Vdc
GND
-COM
SHLD
Display Override
OVERRIDE ALARM