Installation
15
AlphaEclipse 3600 Series A Sign Installation Instructions (9711-8001C)
September 28, 2004
Temperature probe mounting (optional)
NOTE:
Complete this section only if your sign is equipped with a temperature probe.
NOTE:
For two or more signs connected as Master/Master (page 22), attach a temperature probe to
each
sign.
For two or more signs connected as Master/Secondary Master (page 23) or Master/Slave (page 24),
connect a single temperature probe to
just
the Master sign.
Mounting guidelines
•
Choose a location where air movement is not restricted by nearby walls or other obstructions. A light-
colored background is preferable to a dark-colored mounting background. A location above vegetation is
preferable to a location above asphalt or blacktop.
•
Mount the temperature probe at least one foot below the eave of a protected overhang so convection
currents (rising hot air flow) are not trapped around the temperature probe. Also, make sure convection
currents are not blocked by the mounting plates.
•
A location on the north side of a building or other large structure will afford protection from the afternoon
sun. Mount the temperature probe at least 6 feet off the ground. Shield the probe from the effect of the
direct sun, reflected heat, or any nearby sources of heat, such as chimneys, vents, or HVAC ducts.
Installation
1.
Mount the temperature probe vertically using the mounting plate on each side of the probe. The
temperature probe can be mounted on either a flat or a curved surface.
2.
Run the temperature probe cable into the wireway.
NOTE:
The temperature probe cable and the sign’s power wires should be run in different conduits.
3.
Connect the temperature probe cable to TB2 on the wireway terminal block as shown below. Notice the
jumper wire that connects #4 and #5.
4.
Close the wireway securely with the screws provided.
SHIELD
GND
+
5VDC
RS485A
(+)
RS485B
(-)
TERMINA
TION
1 2 3 4 5 6 7
Bare
wire
Blac
k
Red
Green
White
Mount temperature probe
so that the screw holes
on the probe face up.
Temperature probe cable (pn 7122-0401)
Maximum distance from temperature probe
to light sensor board is 250 feet.
Wireway terminal block
Temperature
probe
If a temperature probe will be mounted to a
heat-conducting surface, like metal, prevent
the temperature probe’s metal case from
conducting heat from this surface by:
• placing a non-heat conducting material, like
a wood board, between the surface and the
probe.
• using plastic bolts to mount the temperature
probe or plastic washers under the heads of
metal screws. (This is necessary only if the
mounting screws make contact with the
heat-conducting surface.)
