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United Electric Controls ONE Series - User Manual

United Electric Controls ONE Series
32 pages
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Pressure
Differential Pressure
Temperature
Installation and Maintenance Instructions
IM1-03

Questions and Answers

  • E
    Elizabeth SmithJul 31, 2025
    How to test United Electric Controls ONE Switch if ohmmeter doesn't work?
    • C
      Colleen RodriguezJul 31, 2025
      If you're having trouble testing United Electric Controls electronic switches using an ohmmeter, an alternative method is to measure the voltage drop across the switch while it is connected to the intended load. This will help you determine whether the switch is open or closed.

Summary

Product Description

Sensor Types

Mounting

Wiring

Theory of Operation

Core Operating Principles

Explanation of set point, deadband, and switch mode impact on output.

Status Indicators and Signals

Info on local LED and IAW™ signal for status and diagnostics.

Setting of User Parameters

Switch Mode Configuration

How to select and set the switch mode for desired operation.

Set Point Adjustment

Deadband Adjustment

Troubleshooting

No Power Issues

Diagnostic steps for when the unit appears to have no power.

Switched Output Malfunctions

IAW Output Malfunctions

4-20 mA Output Malfunctions

Display Messages: Value Exceeded Set Point

Interpreting VALUE > SET POINT and VALUE < SET POINT messages.

Display Messages: Range Errors

Connections for Power Supply, IAW Output, and Solid State Relay

Diagram 7 IAW Output Connections for logic solver

Wiring IAW™ output to PLC, DCS, or PC inputs.

100 mA Switched Output Connections

Diagram 10 100 mA Output Connection for logic solver

Wiring 100 mA output to PLC, DCS, or PC inputs.

15 Amp Solid State Relay and 4-20 mA Connections

Diagram 11 15 Amp Solid State Relay Connections

Wiring for 15A solid-state relay output.

Logic Solver and Terminal Block Connections

RECOMMENDED PRACTICES AND WARNINGS

United Electric Controls ONE Series Specifications

General IconGeneral
Product SeriesONE Series
Enclosure RatingNEMA 4X, IP66
Switch TypeSPDT
Hazardous Location ApprovalsClass I Div 1 & 2 Groups B, C, D; Class II Div 1 & 2 Groups E, F, G; Class III; ATEX, IECEx
Housing Material316 Stainless Steel
Electrical Rating0.5 A 125 VDC
Setpoint Accuracy±1% of range
Operating Temperature Range-40 to 185°F / -40 to 85°C (Model Dependent)
Process Connection1/4" NPT, 1/2" NPT (Model Dependent)
Wetted Materials316 stainless steel, Viton
ApprovalsUL, CSA, ATEX, IECEx
CategoryPressure and Temperature Switches

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