Daktronics Data Time Series 50 Time & Temperature Displays - Manual (Page 26)

Electrical
Installation
3-4
The temperature sensor/light detector (optional) is mounted separately and requires a location
away from the influence of chimneys, air conditioners, or vents which can cause abnormal
temperature fluctuations. Usually a separation of at least 20-30 feet horizontally is required to
achieve this. Locations where air movement is restricted are also unsatisfactory.
A first choice sensor location is a north eave or northern exposure. This location gives extra
stability and accuracy to the sensor because of added shading usually obtained on a northern
exposure.
The second choice for locating a temperature sensor is on the display itself, or somewhere on
the display structure. A light-colored display is preferred in this application. Location of the
sensor should be on a northern edge of the display to try to keep the sensor shaded. Greater
accuracy is obtained if there is grass below the sign rather than concrete or some other
material. Display mounted sensors are generally discouraged because of the potential of the
display to self-heat from the sun, causing erroneous temperature readings.
3.5.1 Eave Mounting of Sensor
Drawing A-15267 shows a temperature sensor that has been mounted under a roof
eave. After connections are made, inspect connections, fold wires away, and secure
with #10 screws.
3.5.2 Connection to Controller
A 5-conductor 18-gauge cable (Belden 8465, Daktronics part number W-1007) is used
to connect the temperature/daylight sensor to the display controller. Maximum length
is 1,000 feet. Install as follows:
1. Connect the cable to the temp sensor as shown in Drawing A-15267 and route
through ½” conduit to the display. To reduce the conduit entrances, route this
cable into the display through the same conduit used by the handset controller
signal cable (refer to Figure 4).
2. Route the cable to the display controller enclosure and connect the cable to TB2
on the controller (refer to Drawing A-57319). TB2 is marked with the proper
wire colors (1-white, 2-black, 3-red, 4-brown, 5-green, 6-N.C.).
3.6
Master/Slave Connection
3.6.1 12”, 18”, 24” and 36” Displays
The slave display is electrically connected to the master display by means of an
interconnect harness provided in the slave display. This harness should be routed from
the slave display into the master display using a conduit nipple or other appropriate
method. When back-to-back, the displays can have a maximum separation of 24” due
to the harness length.