Page 2
PRECAUTIONS
(Continued)
• If the 24 VDC or 24VAC power is shared with devices
that have coils such as relays, solenoids, or other
inductors, each coil must have an MOV, DC/AC Transorb,
Transient Voltage Suppressor (ACI Part: 142583), or
diode placed across the coil or inductor. The cathode, or
banded side of the DC Transorb or diode, connects to
the positive side of the power supply. Without these
snubbers, coils produce very large voltage spikes when
de-energizing that can cause malfunction or
destruction of electronic circuits.
MOUNTING INSTRUCTIONS
For optimal readings, follow these tips:
•
Mount in shade on North side of the structure to
minimize sun exposure. In the Southern hemisphere
the South side of the building is where the sensor
should be mounted.
•
Mount at least 1’-2’ (0.3-0.6 m) below eave to prevent
thermal radiation from affecting performance – see
FIGURE 2.
•
Mount at least 4’ (1.22 m) above ground to prevent
thermal radiation rising up affecting performance.
•
The plastic tube that houses the sensor must be
pointed down to avoid debris, water, or ice
potentially affecting sensor performance.
•
Avoid mounting to chimney walls, above windows,
above vents, near doors, or dampers.
Remove the cover from the housing by turrning counter
clockwise. Attach the base directly to the wall. Mounting
holes are located at the bottom of the housing – see
FIGURE 1
. Drill pilot holes for the mounting screws. Use the
enclosure mounting holes as a guide, or use the dimensions
listed above to measure out.
Install the PG11 watertight fitting supplied with the sensor if not
using conduit. The outer knockout ring (PG 11/16) on housing
should not be removed when using a ½” NPT conduit fitting. Take
care when mounting. Sensors should not be placed in
direct sunlight, or any other potential heating or cooling sources that could affect temperature being sensed.
Refer to the wiring instructions below to make necessary connections. After wiring, tighten the -EH cover clockwise onto the enclosure.
Confirm gasketed cover is fastened securely in order to prevent any moisture being introduced into housing.
Version 1.0
I0000806
FIGURE 2:
MOUNTING LOCATIONS
FIGURE 3:
LAYOUT
TERMINAL BLOCKS
RESET BUTTON
DIP SWITCH
END OF LINE
TERMINATION
LED
POWER
ADDRESS
BAUD
D+
EN DIS
BACNET
V
D-
GN
4
6
2
3 6
1 8 4 2 1 4 2 1
Recommended 1-2 ft
(0.3-0.6 m) Below Eave
Install Sensor
Downward
Roof
Ground
TABLE 1:
WIRING CONNECTIONS
TERMINAL BLOCKS
+V
GN
D-
D+
CONNECTIONS
Power Supply Positive 12-36VDC / 24 VAC
Power Supply Common or Ground
EIA-485 Data Negative
EIA-485 Data Positive
