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Chapter 4: Input Programming
The Skymetry WTU-14 features 8 dry contact inputs and 6 ana-
log inputs. The analog inputs are configurable as temperature or
4–20mA. The contact inputs can be used with Normally Open (NO)
or Normally Closed (NC) sensors. The analog inputs can be used
with 10K thermistors for temperature monitoring (available from
Phonetics) or any 4–20 mA transducer. The monitored temperature
range is -60° to 175° F (-51° to 79° C). Programmable table values
can be entered when using 4–20mA transducers to scale the reading
to the appropriate units of measure.
Note: It is highly recommended that if you make
any programming changes locally (at the unit via
the serial port) after your web page has been initial-
ized, that you click the Programming Refresh Link
on the web page soon thereafter. This is to ensure
that the information you are viewing on the web
page is up to date. This will also ensure that the
alarm log information displayed on the web page is
accurate.
Alarm States
Each Dry Contact or Analog input is monitored based on the pro-
gramming parameters that define the input type and the alarm limits
for each input. Based on this programming all inputs will always
be in one of four Alarm States: Normal, Alarm, Unacknowledged
Alarm, or Normal-Unacknowledged. Each of these alarm states is
defined below:
A "Normal" alarm state means that an input is either:
a) Within the programmed alarm limits.
b) A Normally Open input is open, or a Normally Closed input is
closed.
c) An input is beyond its limits or is opposite of its pro-
grammed normality, but has not yet met its programmed alarm
Recognition Time.
Chapter 4: Input Programming
39
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