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US-6011SS-4-20 mA Analog Output
The US-6011SS-4-20-mA analog output is a voltage sourcing sensor that outputs current
proportional to the weight range of the calibrated scale (i.e. 4 mA = 0 LBS and 20 mA = 10,000
LBS). It is a sensor with a sourcing output (i.e. the sensor will source 9VDC with an output
current range of 4-20 mA). An external supply voltage should not be connected to the unit’s
4-20 mA circuit, unlike many other “loop powered” type 4-20 mA sensors; however, the
ground connection (pin 6) of the DB-9 connector must be connected to the same ground as
the data acquisition device responsible for interoperating the 4-20 mA signal.
This ground connection is imperative, as both the data acquisition device’s power supply
and the scale’s internal 9VDC power supply will need to be on the same ground plane for the
output current to be synced and measured correctly. Please refere to the figure below as a
visual clarification on how to connect your scales 4-20 mA output to a data acquisition device.
Highlights of using the 4-20mA option
• Resolution: 1/10000
• Outside Load: 100-350ohms
• Inside connection: load input port pin “1” of J2, ground port pin “GND” of J2
• Outside connection: load input port pin 1 of RS232, ground port pin 6 of DB-9
connector
• To test the connection, connect a 250 ohm load; Locate a volt meter, and probe across
the 250 ohm load. As the weight input to the indicator varies, the voltage of the volt
meter will change accordingly
• Pressing the TARE key will reset to output current to 4mA
• 0-20mA output can be set by setting parameter C31 to 0
• Please note that this option will disable the RS232 weigh data output that comes in the
standard indicator
