United Electric Controls ONE Series Manuale utente

Pressure

Differential Pressure

Temperature

Installation and Maintenance Instructions

IM1-03

Table of Contents

Product Description 3

Sensor Types 4

Product Labeling 5

Mounting 5

Wiring 7

Theory of Operation

Setting of User Parameters 4

Troubleshooting 7

Frequently Asked Questions 22

Dimensional Drawings 24

Connections for Power Supply,

IAW Output, and Solid State Relay 26

One Series Electronic Pressure, Differential Pressure & Temperature Switches are designed for

critical alarm and shutdown applications in harsh, hazardous environments. One Series electronic

switches measure the process variable and provide local alarm or shutdown actuation. The uni ue

IAW (I Am Working) circuit provides the local and remote indication of the output status and the

"health" of the product. An internal solid-state switching device allows for long switch life with no

arcing or contact wear, providing years of reliable operation. The local process and status

indication, as well as a proprietary remote status signal, provide a clear indication that the One

Series product is functioning properly.

Low level (open drain) DC output(s) may be used to trigger control circuits or a discrete input to

a process computer. The switch output may be configured for normally open or normally closed

operation by the user in the field by keypad programming and without re-wiring.

A 15 Amp 280 VAC solid-state relay option provides local high level switching for actuation or

shutdown of your system. An optional 4 to 20 mA analog output allows remote monitoring and

trending of the process variable. The self-contained, compact package allows for easy retrofit of

traditional switches or transmitters.

A 115 VAC input/output option enables the One Series to be powered by an AC source and switch

AC loads. Designed for Division 2 hazardous locations and harsh environmental conditions, this

rugged design will stand up to your most demanding applications.

The One Series is simple to use. Below are three easy steps to mount, wire and

configure your product:

1. Mount the One Series using the process connection or two mounting ears.

2. Wire the One Series using the convenient conduit connection. Color coded lead wires

or optional terminal block allow field connections to be made uickly.

3. Configure the One Series using the simple four key keypad and helpful display prompts.

Remove cover, choose an operating mode, set point and deadband. Replace cover.

PART NUMBERS BEGINNING IN "D1D" INCLUDE AN INTEGRAL UPPER HOUSING CONTAINING

115 VAC POWER SUPPLY, 5A SOLID-STATE RELAY AND HIGH- AND LOW- POWER TERMINAL

BLOCKS. OPTION CODE M028 DENOTES 230 VAC. MAXIMUM ELECTRICAL RATINGS, AS NOTED ON

THE PRODUCT NAMEPLATE, SHOULD NOT BE EXCEEDED. TERMINAL BLOCKS ACCEPT 20 TO 14 AWG.

THIS PRODUCT MAY INCLUDE BOTH 115/230 VAC AND 24 VDC CIRCUITS. DISCONNECT ALL

SUPPLY CIRCUITS BEFORE WIRING UNIT. WIRE UNIT ACCORDING TO NATIONAL AND LOCAL

ELECTRICAL CODES. MAXIMUM RECOMMENDED WIRE SIZE IS 14 AWG. ELECTRICAL RATINGS

STATED IN LITERATURE AND ON NAMEPLATES MUST NOT BE EXCEEDED. OVERLOAD ON A SWITCH

CAN CAUSE FAILURE.

Product Description

Please read all instructional literature carefully and thoroughly before starting.

Refer to the final page for the listing of Recommended Practices, Liabilities,

and Warrantees.

TTyyppee 11 -- PPrreessssuurree::1/2 Female, 316 stainless steel pressure

connection, piezo-resistive strain gauge ceramic sensor

(96% alumina), Viton o-ring standard, other o-ring materials

optionally available

TTyyppee 22 -- TTeemmppeerraattuurree::0.25 OD 304 stainless steel sensor

housing (models L, H, R), mineral insulation (model H) or

Teflon coated leads with metal over-braid (model R). If a

threaded connection is re uired, order PF73 compression

fitting (model L) or SA6213-384 union connection (models H, R).

TTyyppee 33 -- DDiiffffeerreennttiiaall PPrreessssuurree ((DDrryy)): 1/4 -18 NPT Female,

aluminum, glass, plastic, 2 ports 180oopposing, clean air or,

inert gas only (optional plastic barb fittings available)

TTyyppee 44 -- DDiiffffeerreennttiiaall PPrreessssuurree WWeett: 1/4 - 18 NPT female, 2

ports 180oopposing, 316 stainless steel wetted parts

Sensor Types

Model H & R Model L

Product Labeling

Before installing, verify that you have the proper configuration for your application. The name-

plate on the side of the unit will give you key specifications (see the One Series Bulletin for

complete specifications.)

Your Part Number

located here

The Part Number

is modular. An example

of typical breakdown is:

One Power & Sensor Aux.

Series Output info. info. Output

D1 C 1 H1 O N

Tools Required

11/16" wrench for sensor hex fitting

Screwdriver for mounting bolts

2 mounting bolts (1/4" Max.)

FOR PRESSURE AND LOCAL TEMPERATURE MODELS ALWAYS HOLD A WRENCH ON THE

SENSOR HEX WHEN MOUNTING UNIT. DO NOT TIGHTEN BY TURNING ENCLOSURE. THIS

WILL DAMAGE THE CONNECTION BETWEEN THE SENSOR AND HOUSING.

INSTALL UNITS WHERE SHOCK, VIBRATION AND TEMPERATURE FLUCTUATIONS ARE

MINIMAL. ORIENT UNIT TO PREVENT MOISTURE FROM ENTERING ENCLOSURE. USE

PROPERLY RATED SEALING FITTINGS FOR ELECTRICAL WIRE ENTRY. DO NOT MOUNT UNIT IN

AMBIENT TEMPERATURES EXCEEDING PUBLISHED LIMITS. THIS IS ESPECIALLY CRITICAL FOR

LOCAL MOUNT TEMPERATURE UNITS.

Mounting

IN HIGH SHOCK AND VIBRATION APPLICATIONS, SECURE THE ENCLOSURE AS DETAILED

BELOW. DO NOT MOUNT VIA THE PROCESS CONNECTION ONLY.

The One Series product may be mounted in any position providing the electrical conduit

connection is not facing up. See Diagrams 1 and 2 on pg. 24/25. Ensure the process connection

is sealed to the process port to prevent leakage.

Electronics Housing

For products beginning with D1A, D1B & D1C, mount the unit using the two (2)¼" clearance holes

in the mounting ears. Plumb sensor to the process port.

For products beginning with D1D - Mount the unit to a flat surface using the 1/4" diameter bolt

holes shown in Diagram 3 (pg. 25). Maximum diameter of the screw head is 0.285. Attach

conduits to insure a water proof NEMA 4X system. Conduit fitting should be sealed if condensation

or water entry is a possibility.

Process Connections

PRESSURE AND DIFFERENTIAL PRESSURE MODELS

To pipe mount. Thread the pressure connection onto the pressure port. Use a wrench on the hex

pressure connection to tighten. For differential pressure models (dry only), connect to 1/4"-18 NPT

fitting or use barb fitting kit #62169-19 (2 re uired). Test for leaks. IN HIGH SHOCK AND VIBRATION

APPLICATIONS, SECURE THE ENCLOSURE AS DETAILED ABOVE. DO NOT MOUNT VIA THE PRESSURE

CONNECTION ONLY.

LOCAL AND REMOTE TEMPERATURE MODELS

For surface sensing (models H & R): Secure the 2½" sensor housing to the pipe or vessel using

an adhesive or strapping method suitable for the application.

For immersion sensing (models L, H or R): Use of a thermowell is highly recommended to aid in

maintenance, testing and preservation of the system integrity. Insert the sensor housing (0.25 diameter)

into the well ensuring that the housing bottoms out and will be completely immersed in the media (2.5"

min.) Secure the sensor using an appropriately sized compression fitting or union connector.

For ambient sensing (model L): Mount using the mounting ears on the electronics housing. Mount

the product to ensure that the sensor housing will not be damaged and where the measured

temperature is representative of the surrounding environment.

For best temperature measurements, the sensor housing must be in full contact with the surface

or media being measured. Heat transfer compound may be used to aid in fully transferring the

media temperature to the sensor housing. Locate where the temperature is most representative

of the system. Minimum insertion depth is 2½".

For remote sensors, route the extension wire to avoid contact with live components. Avoid kinks,

or excessive flexing.

Wiring

Tools Required

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.

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 SWITCHING OF THE OUTPUT ON START-UP

WILL HAVE ADVERSE AFFECTS ON THE SYSTEM, ENSURE THAT THE OUTPUT(S) ARE NOT CONNECTED

UNTIL THE PRODUCT HAS BEEN CONFIGURED APPROPRIATELY.

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.

Ground Connections for Products Beginning with D D

Connect ground wire to the Ground Screw in the upper left hand corner of the AC Power

Supply enclosure (see Diagram 3 - 115 VAC Power Supply Configuration).

Power Supply Connections (Models D A, D B, & D C only)

The One Series is powered using an 18-30 VDC power source.

The power supply circuit common is shared internally with:

nthe IAW switched output (all models)

nthe 100 mA open drain switch output (models D1A & D1B only)

nthe optional 4-20 mA signal (all models)

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.

Power Supply Connections for Products Beginning with D D

The D1D One Series is powered using 115 VAC, +/- 10%. The power supply should be wired up

to TB2 terminals noted L1 (Hot) and L2 (Neutral) per Diagram 3 - Power Supply Configuration.

Primary Switched Output Connections (T ype D A or D B)

The One Series' models A & B 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). The negative (-)

side of the load will be connected to the One Series output connection. The positive side of the

load is connected to the load power source V+. See Diagram 8.

NOTE: If the switched output load is inductive (e.g., a relay), a fly back diode, such as a 1N914

should be used to prevent electrical spikes into the switched output circuit. See Diagram 9.

Logic Solver Connection For 00mA Switched Output

The One Series' 100 mA switched output may also be connected to a digital input channel on a

logic solver. Some logic solver inputs re uire a pull-up resistor where 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 re uired by the logic solver. See Diagram 10.

Solid State Relay Switched Output (Type D C)

The One Series SSR switched output is a single pole, single throw (SPST) switching device which

makes and breaks the output circuit. Two terminals are provided for the external load power

source (VAC-HI) and the switched signal connected to the device under control (LOAD). Wire the

output as follows, per Diagram 11.

nThe power source connects to the terminal marked VAC-HI

nThe load connects to the terminal marked LOAD

nThe other load connection is to the power source return

Solid-State Relay Output Connections (Type D D)

The SPST solid-state relay output is rated at 5A maximum @ 115/230 VAC. Off-state leakage

current is 0.1mA @ 115/230 VAC. Connect the load to TB2 per Diagram 3. Connect one end of

the load to L2 on the terminal block and the other end is connected to LOAD on the terminal block.

For standard D1D models the VAC input that powers the unit also feeds the input side of the SSR

switch. Option M027 is used if an independent VAC input to the SSR is desired (SSR input range

24-280 VAC). For inductive loads (contactors, solenoids or motors), option M026 must be

specified. For 230 VAC models, specify option code M028.

IAW Output Connections

The One Series open drain IAW output is a 100 mA "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 con-

nected 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 positive side of the power source V+.

See Diagram 5.

NOTE: If the IAW load is inductive (e.g., a relay), a fly back diode, such as a 1N914 should be

used to prevent electrical spikes into the switched output circuit. See Diagram 6.

For model D1D (VAC powered), the IAW switch 5 to 30 VDC power must be supplied externally.

Wire the positive side of the "load" to the power supply and the negative side to the terminal marked

IAW on TB1 per Diagram 3.

Logic Solver Connection For IAW Output

If the One Series IAW output is connected directly to a digital input channel on the logic solver,

an appropriately sized pull-up resistor may be re uired (see note) 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 re uired by the logic solver. See Diagram 7.

NOTE: Some logic solver inputs already include a pull-up resistor or circuit. Consult United Electric for

flow charts, state diagrams and timing charts for the IAW output when interfacing with a logic solver.

Optional 4-20 mA Analog Process Signal Output

The One Series 4-20 mA output signal is intended for remote monitoring or trending of the

process variable. The output is a sourcing output which is powered from the One Series VDC

power. It does not use a separate loop power supply, which simply means, no external power

supply should be applied to this connection.

The One Series sources current to the load, indicator, controller or an analog input of a logic

solver. See diagram 12 and 13. One side (positive, +) of the load (500Ωmax.) is connected to

the 4-20mA output and the other side should be returned to the One Series common

(to complete the circuit loop).

4-20 mA connections to positive side of the load circuit:

nFor Model A, this would be the Yellow, 20 AWG wire.

nFor Models B & C, the terminal is marked 4-20 mA.

nFor Model D, the terminal is marked TB1 and labelled 4-20 mA

The Negative (-) lead of the load circuit must return to the One Series circuit common connection.



Summary of Wiring Connections

The following tables show the output function and the corresponding connection on the product.

Wit Switc Rating Code A

FUNCTION WIRE GAUGE/COLOR

Switched Output (5 to 30 VDC, 100 mA max.) 20 AWG/Brown

IAW Output (5 to 30 VDC, 100 mA max.) 20 AWG/Orange

4 - 20 mA Output - Positive (+) (Optional) 20 AWG/Yellow

Power Supply Input + (18 - 30 VDC) 20 AWG/Red

Power Supply and Signal Ground (Common) 20 AWG/Black

Wit Switc Rating Code B

FUNCTION TERMINAL LABEL

No Connection Blank

Switched Output (5 - 30 VDC, 100 mA max.) SWT-OUT

IAW Output (5 - 30 VDC, 100 mA max.) IAW

4 - 20 mA Output - Positive (+) (Optional) 4-20MA

Power Supply Input + (18 - 30 VDC) + VDC

Power Supply and Signal Ground COMMON

Wit Switc Rating Code C

FUNCTION TERMINAL LABEL

Switch Supply - IN (24 - 280 VAC, 15 A max.) VAC-HI

Switched Output - OUT (24 - 280 VAC, 15 A max.) LOAD

IAW Output (5 - 30 VDC, 100 mA max.) IAW

4 - 20 mA Output - Positive (+) (Optional) 4-20MA

Power Supply Input + (18 - 30 VDC) + VDC

Power Supply and Signal Ground COMMON

Wit Switc Rating Code D

FUNCTION TERMINAL LABEL

Switch Output (115 VAC, 5 A max.) LOAD (see note)

Power Supply Input (115 VAC) L1

Power Supply Return (115 VAC) L2

4 - 20 mA Output - Positive (+) (Optional) 4-20MA

IAW Output (5 - 30 VDC, 100mA max.) IAW

Power Supply and Signal Ground COMMON

NOTE: For units with Option M027 only:

Solid-state relay INPUT connection (free contact) SSR INPUT

Solid-state relay LOAD connection (free contact) SSR LOAD

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