UE ONE Series, Installation & Maintenance Instructions Manual

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2
Route the extension wire to avoid contact with live
components. Avoid kinks, or excessive flexing. Heat
transfer compound may be used to aid in temperature
response.
Electronics Housing
Mount the unit using the two (2) ¼” clearance holes on
mounting ears. Plumb sensor to the process port.
WIRING
TOOLS
Flat-blade screwdriver if terminal block is specified
Wire strippers
DISCONNECT ALL SUPPLY CIRCUITS BEFORE
WIRING UNIT. WIRE IN ACCORDANCE WITH
NATIONAL AND LOCAL ELECTRICAL CODES.
MAXIMUM RECOMMENDED WIRE SIZE IS 14
AWG. THE RECOMMENDED TIGHTENING TORQUE
FOR FIELD WIRING TERMINALS IS 6.5 IN/LBS.
ELECTRICAL RATINGS STATED IN LITERATURE AND
ON NAMEPLATES MUST NOT BE EXCEEDED.
OVERLOAD ON A SWITCH CAN CAUSE FAILURE.
NOTE:
If unexpected changes in the output will have an
adverse affect on your system, it may be best to configure
the product off-line by applying temporary power to
the device and programming the mode, set point and
deadband values.
The inputs and outputs of the One Series product are
protected against reverse polarity and over voltage.
However, correct wiring is essential to ensure proper
operation of the switch. Optional configurations may change
the terminal designation, location, wire color or size. Be
certain to choose the proper wiring Diagram for the product
being installed. See Diagrams 4 to 14 for wiring/terminal
designations.
Power Supply Connections
The One Series is powered using an 18-30 VDC power
source. The power supply circuit common is shared
internally with:
•
the IAW™ switched output
•
the 100 mA open drain switch output
•
the optional 4-20 mA signal
Connect the positive (+) lead to the Red, 20 AWG wire
(Model A) or the terminal marked V+ (Models B & C).
Connect the negative (-) lead to the Black, 20 AWG wire
(Model A) or the terminal marked circuit common (Models B
& C). See Diagram 4.
ALTHOUGH THE ONE SERIES INCORPORATES
REVERSE POLARITY AND SURGE
PROTECTION ON THE POWER SUPPLY INPUT,
IT IS HIGHLY RECOMMENDED THAT POLARITY
AND VOLTAGE LEVELS BE CONFIRMED PRIOR TO
POWERING THE UNIT. IF ERRANT SWITCHING OF
THE OUTPUT WILL HAVE ADVERSE AFFECTS ON THE
SYSTEM ENSURE THAT THE OUTPUT(S) ARE NOT
CONNECTED UNTIL THE PRODUCT HAS BEEN
CONFIGURED APPROPRIATELY.
IAW
 
Output Connections
The One Series 100 mA open drain IAW™ output is a
“sinking” output which completes the circuit to the circuit
common. The power for the IAW™ output must be
provided externally and referenced to the power supply
circuit common (earth ground).
If the device to be controlled is a pilot light or relay, the
negative (-) side of the load will be connected to the One
Series output connection.
For Model A, this would be the Orange, 20 AWG
wire.
For Models B & C, the terminal is marked IAW™
output.
The positive side of the load is connected to the load power
source V
l
+. See Diagram 5.
NOTE:
If the IAW™ load is inductive (i.e. a relay), a fly
back diode, such as a 1N914 should be used to prevent an
inductive feedback into the switched output circuit. See
Diagram 6.
LOGIC SOLVER CONNECTION
The One Series IAW™ output is connected directly to a
digital input channel on the logic solver. An appropriately
sized pull-up resistor must be connected between the digital
input and a DC power source. The value of the pull-up
resistor must be calculated based on the excitation voltage
and the voltage threshold for a logic level low required by the
logic solver. The off-state leakage current of 10
µ
A must be
factored into the equation. See Diagram 7.
NOTE:
Consult United Electric for flow charts, state
diagrams and timing charts for the IAW output when
interfacing with a logic solver.
100 mA Switched Output Connections
(Output Models A & B)
The One Series' 100 mA open drain switched output is a
“sinking” output which completes the circuit to the circuit
common. The power for the switched output must be
provided externally and referenced to the power supply
circuit common (earth ground).
If the device to be controlled is a pilot light or relay, the
negative (-) side of the load will be connected to the One
Series output connection.
For Model A, this would be the Brown, 20 AWG
wire.
For Models B & C, the terminal is marked SWT-
OUT.