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MN300480
Rev A1
WIRING (continued)
Step Six
General notes for electrical connections, usage and safety:
Where personal safety or significant property damage can occur due to a spill, the installation must
have a redundant backup safety system installed.
Wiring should always be completed by a licensed electrician.
Supply voltage should never exceed 28 VDC.
Protect the sensor from excessive electrical spikes by isolating the power, whenever possible.
The sensor materials must be chemically compatible with the liquids to be measured.
Design a fail‐safe system for possible sensor and/or power failure.
Never use the sensor in environments classified as hazardous.
Voltage Output:
EchoSonic® II can be used as a 0 to 5 or 0 to 10 VDC output device. A resistor will need to be
added to the circuit to enable a voltage output (refer to the wiring diagram below).
0‐5 VDC output
o
Add a 250 Ohm resistor
o
Actual output will be 1 to 5 VDC
0‐10 VDC output
o
Add a 500 Ohm resistor
o
Actual output will be 2 to 10 VDC
