Wiring Sensors To Analog Inputs - Phonetics Skymetry WTU-14 User Manual

Chapter 2: Installation

Wiring Sensors to Analog Inputs

The WTU-14 has 6 Analog inputs that can be used to monitor 10K
Thermistors (temperature) or 4–20mA transducers. Analog trans-
ducers are wired to the terminals labeled A1 through A6. The cor-
responding Ground terminals are located on the lower level terminal
strip. The input must be configured by setting the corresponding
jumper in either the Temperature or 4–20mA position. See figure
below:
Figure 10: Input A2 configured for temp, A3 configured for 4-20mA
Temperature: The unit will accept 10K thermistors. These should be
wired to an Analog Input terminal and the adjacent ground termi-
nal. For compatible thermistors check the accessory list or thermis-
tor data in the appendices. 10K Thermistor temperature range: -60ºF
to 175ºF (-51ºC to 79ºC).
4–20mA: A 4–20mA transducer requires you to have an external
DC power supply for the transducer. Connect the positive wire of
your transducer to the positive terminal of your DC power supply.
Connect the negative terminal of the transducer to an Analog Input
terminal on the Skymetry WTU-14. Connect the negative terminal
from your power supply to the adjacent ground terminal on the
WTU-14.
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