Sutron Xpert2, Operation And Maintenance Manual

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MRL 700 Radar Sensor (MRL700)
Inputs
<none>
Outputs
dist
level
sigstr
Wiring and Configuration
NOTE: To use this block with the Xpert requires a unit with additional com ports configured as
RS-485. Set the jumper for +12 volts to use power from this board.
Connect the sensor RS485 A to the RS485A (pin 3) and the sensor B to the RS485B (pin 2).
NOTE: Leave the settings in the SETUP TAB/ COMS (SSP/CL) set to none, as this block will
not be able to use the com port if Coms (SSP/CL) is already using it.
The sensor must be configured to output in the following format: distance, signal strength with
9600 baud, 7bit, even parity, one stop bit. Configure the sensor to output 0.00 if it loses signal.
For more information see the 8800-1146 MRL users manual.
Connect Power leads as configured below, either to GND and SW'D 12 (for AIO sw or DIO sw),
or through a relay that is switching the battery and using the selected DIO channel for control.
Description
The MRL700 is used for measuring distance and, therefore, level. The properties dialog is used
to specify configuration details required for proper operation.
“Reference” is used to specify the reference distance and is used to compute level.
“Warmup” is the number of seconds the unit should be powered on before taking a measurement.
A typical warmup value is 30 seconds, this is the time the sensor needs to provide back reliable
readings. If the values are to be averaged, make sure to set the average time to at least two times
this warmup time (I.E. For 30 seconds of warmup the sensor should be averaged for at least one
minute)
“Inactivity” is the number of seconds the unit should remain powered on following a
measurement. This prevents the sensor from having to go through the warmup time for every
reading I.E. If averaging every 5 seconds, setting this inactivity timer to 10 seconds, will keep
power on between readings.
“PwrCtl” is used to specify how the sensor is to be powered on. When set to “DIO Sw”, DIO
switched-12 is used to control power. When set to “AIO Sw”, AIO switched-12 is used to control
power to the sensor. (On the Xlite, of course, AIO and DIO switched-12 are the same thing).
When set to “DIO Chan”, the module and channel fields are used to determine the digital output
used to control power to the sensor.