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Resistance Input mode (Passive Input)
Passive Inputs
are all those devices that vary in resistance, including switch contacts.
measurement
Universal
Input
Uniput
These all require a current supplied by the
The passive sensor types supported by the
•
Pre-programmed Passive Temperature Sensors.
•
Potentiometer (normally used as a 0 to 10 KΩ or a 1 KΩ to 11 KΩ variable resistor to give a 0 to 100 %
output).
•
Volt-Free Digital Input (the controller strategy measures the contact resistance and gives a
output).
•
Straightforward Resistance measurement. This can be used with the
temperature output for temperature sensors that are not factory pre-programmed into the
8R8(-H).
In
CXproᴴᴰ
simply select '
parameters (the
Pulsed
temperature sensor, while the
In
Passive Input Mode
Note:
The reference voltage can be pulsed or continuous, using the solid state switch.
A pulsed reference gives optimum accuracy by eliminating self-heating in the sensor, and this is the
default setting.
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Resistance
Temperature
Measurement
CBXi-8R8(-H)
CBXi-8R8(-H)
' sensor type in the
Resistance
option increases accuracy by eliminating any self-heating in the passive
Continuous
option can trade absolute accuracy for speed).
the
Uniputs™
and Universal Inputs configure like this:
CBXi IP Controller |
Switch
Pulse
Contact
counting
terminal so that this resistance can be measured.
are:
Make Linear
and select
Point Module
Pulsed
CBXi Operation
24 V AC
Detection
n/a
or
0
1
block to give a
CBXi-
in the
Advanced
67
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