Rockwell Automation 1440-VDRP06-00RH XM-160/161/162 Direct Vibration Module - Manual (Page 78)

Publication GMSI10-UM025C-EN-P - August 2010
70 Configuration Parameters
4-20mA Output Parameters
(XM-161) The 4-20mA output parameters define the characteristics of the 4-20mA
output signals. The XM-161 supports a total of six 4-20mA outputs. Each
output is permanently associated with a corresponding channel. The
parameters are the same for each output.
IMPORTANT
The 4-20mA output parameters are available only in the
XM-161 module.
4-20mA Parameters
Parameter Name Description Options/Comments
4-20mA Output (XM Serial
Configuration Utility only) Sets the 4-20mA output to be configured in the XM
Serial Configuration Utility. Each output is associated with a
corresponding channel.
Enable Enables/disables the 4-20mA output.
Min Range The measured value associated with the 4mA. Same measurement unit as Output
Data Unit selection for the specified
channel.
Max Range The measured value associated with the 20mA.
XM Configuration
Utility EDS File
Check to enable Enabled
Clear to disable Disabled
IMPORTANT
Measured values between Min Range and Max Range are
scaled into the range from 4.0 to 20.0 to produce the
output value. The Min Range value does not have to be
less than the Max Range value. If the Min Range value is
greater than the Max Range value, then the output signal
is effectively inverted from the input signal.
IMPORTANT
The 4-20mA outputs are either on or off. When they are
on, the 4-20mA outputs overshoot the 4 and 20mA limits
by 10% when the measurement exceeds the minimum and
maximum range. This means the minimum current
produced is 3.6mA and the maximum current produced is
22mA.
When the 4-20mA outputs are off, they produce a current
approximately 2.9mA. The 4-20mA outputs are off under
the following conditions:
• The 4-20mA outputs are set to "Disable" (see Enable
above).
• The module is in Program mode.
• A transducer fault occurs that affects the corresponding
measurement.