NEO 01/0820
Rev A
31
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Wiring
Step Six
WIRE CONNECTIONS
(+) Power & (-) Return:
(+) Power and (-) Return leads are for
connection to a 24 VDC power supply or to a 4-20 mA loop power
source. The (+) and (-) wires can be extended up to 1,000 feet
using a 22-gauge or larger wire.
(W) Tx (Out) & (G) Rx (In):
(W) Tx and (G) Rx leads are reserved
for use with configuration. These wires should only be connected to
one device at a time. In addition, these wires should not be
connected to the NEOCal software while power is supplied from
any source other than the NEO-PFOB. The maximum cable
distance between the computer and NEO-7 is 15’.
Note: Never
allow the white or green wires to touch any power supply.
UG06 Series
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.
Wiring should always be completed by a licensed electrician.
Supply voltage should never exceed 28 VDC.
Use 16 to 24 AWG for connecting to terminals.
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.
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During power failure, relays will remain in their current state and will not change until power is
restored and the signal is reacquired.
Note: When connecting the sensor to the NEOCal software, you must remove the display or the
software will not connect. Once completed, you can re-connect the display to the terminal.
Never use the sensor in environments classified as hazardous.
