Installation guide

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Cooper Bussmann BU-905U-L Wireless I/O Configuration Manual
3A1579Rev1.4
GLOSSARY
Analog Signal
Analog signals are continuously variable signals. The BU-905U-L sup-
ports analog signals in the range 0-20 milli-amps.
Cold Junction Temperature Compensation
When using thermocouples, the module compensates for the reading
errors caused by the temperature of the connection between the
thermocouple wires and the module terminal strip.
Debounce Delay
Number of seconds that a signal must be changed to be recognized
as changed.
Discrete Signal
Discrete signals are either active (on) or inactive (off).
Mapping
Configuration item that lets you link inputs at one module to outputs at
another module. Mappings are triggered either by a change in some
of the input data that they send, or by a timer to send an update if the
data hasn’t changed.
Module
The actual remote device hardware being configured.
Output reset time
If an output doesn’t have any data sent to it, it can be configured to
turn off (reset). Output reset time is the time to wait after receiving
data before resetting the output to a safe state (0mA for analog, off for
digital).
Paralysis
Minimum number of seconds after a mapping is transmitted that it
can be transmitted as a second event if triggered.
Post linearization scaling
Lets you to change the range of temperature reported by the
thermocouple system. This is a scale factor applied after linearizing
the thermocouple voltage to a temperature range.
Pulsed Input
Used to count the number of times an event has occurred. Pulsed
inputs are attached to a discrete input, and count the number of times
the input has switched from off to on.
Repeater
A module that receives a message and passes the message to
another module.
Sample Time
Determines how often the module checks an analog signal.
Sensitivities
Unit sensitivities indicate the change required in an input for
BU-Config to detect a state change and transmit a new value.
Setpoint
Setpoints let you generate a discrete signal based on the value of an
analog input. Each setpoint is associated with two different values - a
high threshold value and a low threshold value. When the analog input
moves below the low threshold value the set point turns off. When the
analog input moves above the high threshold value the setpoint turns
on. When the analog level is between the high and low threshold
values, it does not change.
Thermocouple
Thermocouples measure temperature by using the Seebeck effect that
occurs at the junction of dissimilar metals.
Thermocouple Linearzation Table
Thermocouple tables translate the millivolt signal from a thermocouple
to an actual temperature measurement. The BU-905U-L provides
built-in support for E, J, K and T type thermocouples, and support for
other thermocouple types through user compensation tables.
Unit
Configuration of a particular device (module) stored inside the
configuration software
Warm Up Time
Determines how long the analog circuits are powered up before
performing the sample.