Banner Sure Cross DX80 Series Instruction Manual page 66

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Sure Cross Performance DX80 Wireless I/O Networks
For more information on Banner's star network products, refer to the
Wireless I/O Network Instruction Manual (p/n
switch power Efficient power management technology enables some
output supply, called switch power (SP), that briefly steps up to power sensors (ideally, 4 to 20 mA loop-
powered sensors). The warmup time denotes how long the sensor must be powered before a reliable
reading can be taken. After the warmup time has passed, the input reads the sensor, then the switched
power shuts off to prolong battery life.
system The system operating margin, or fade margin, is the difference between the received signal level (in
operating dBm) and the receiver sensitivity (also in dBm) required for reliable reception. It is recommended that
margin (fade the receiver sensitivity be more than 10 dBm less than the received signal level. For example, if the
margin) signal is about –65 dB after traveling through the air and the radio receiver is rated for -85 dB, the
operating margin is 20 dB — an excellent margin.
tau filter Set to zero (0) to turn off the tau filter. Set to 1 (weakest filter) through 6 (strongest filter) to turn on the
tau filter. (In the DX80 products, the Low Pass Filter is a combination of the median filter and the tau
filter.)
TCP/IP TCP/IP stands for Transfer Control Protocol / Internet Protocol and describe several layers in the OSI
model that control the transfer and addressing of information.
time-division TDMA is a wireless network communication architecture that provides a given slot of time for each
multiple access device on the network, providing a guaranteed opportunity for each device to transmit to the wireless
(TDMA) network master device.
thermistor A thermistor is a temperature-sensitive resistor that changes resistance based on temperature
fluctuation.
thermocouple A thermocouple is a temperature measuring device consisting of two dissimilar metals joined together
so that the difference in voltage can be measured. Voltage changes in proportion to temperature,
therefore the voltage difference indicates a temperature difference.
The different "types" of thermocouples use different metal pairs for accuracy over different temperature
ranges. Thermocouples are inexpensive, relatively interchangeable, have standard connectors, and have
a wide temperature range of operation. They can be susceptible to noise, with the wire length affecting
accuracy. Thermocouples are best suited for applications with large temperature ranges, not for
measuring small temperature changes over small ranges.
threshold and Threshold and hysteresis work together to establish the ON and OFF points of an analog input. The
hysteresis threshold defines a trigger point or reporting threshold (ON point) for a sensor input. Setting a threshold
establishes an ON point. Hysteresis defines how far below the threshold the analog input is required to
be before the input is considered OFF. A typical hysteresis value is 10% to 20% of the unit's range.
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Sure Cross Performance DX80
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Flex Power devices to include an internal power