UE 2W2D Скачать руководство пользователя страница 12 | Manualshive

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UE 2W2D Скачать руководство пользователя страница 12

12

IM_ONE-01

www.ueonline.com

LADDER LOGIC EXAMPLE

(used for detecting the pulsed output)

Ladder logic for One Series 2-wire model 2W2D
Pulse-on-rise output (25 mSec)

SELECTING AN INTRINSIC SAFETY BARRIER

(Model 2W2D only)

WARNING: INSTALLATION OF INTRINSICALLY SAFE CIRCUITS MUST BE PERFORMED IN ACCORDANCE WITH THE REQUIREMENTS OF THE GOVERNMENT
AND/OR OTHER LOCAL AUTHORITY HAVING JURISDICTION. SYSTEM COMPONENTS AND INSTALLATION METHODS MUST BE APPROVED BY THE APPROPRI-
ATE RECOGNIZED APPROVAL AUTHORITY.

The information provided below is for reference only and is intended to act as a guide in the selection of a suitable I.S. Barrier. Please reference one of the
following I.S. control drawings for installation details and device entity parameters:

A-62174-19

(North American, Class, Division & Zone based installations)

A-62174-20

(European, Class, Zone based installations)

There are two general types of Intrinsic Safety Barriers, shunt diode (passive) safety barriers and transformer isolated barriers. Shunt diode safety barriers are
the simplest and least expensive type of I.S. interface for protecting circuits in hazardous areas. Diode safety barriers must be installed with a suitable (<1Ω)
earth ground. Isolated barriers offer simplified installation, since there is no requirement for the ground, but are generally more expensive than the diode safety
barriers.

Shunt Diode Safety Barriers:

The entity parameters of diode safety barriers suitable for use with the 2W2D models are:

V max = 28 Volts

I max = 93 mA

Because the 2W2D model derives its operating power from the input of the host device to which it is connected it is also important to select a barrier with a low
leakage current. This is typically specified as V

wkg

, the working voltage , at which 10 uA of leakage current will occur.

V

wkg

> 25 Volts; at 10 uA of leakage current is ideal

Suggested Sources:

P Fuchs

®

Model No. Z787

MTL

®

Model No. 7087+

Transformer Isolated Barriers:

Due to the unique method by which the model 2W2D operates, a specifically designed isolated barrier must be used:
(Contact United Electric Controls for pricing and availability: (617)926-1000 Tech. Sales)

The isolated barrier is available from UE, your distributor, or MTL:

(Choose One)

•  Order UE Part Number 62169-29 for the Barrier packaged separately from UE or your distributor, or
•  Order Option Code M036 for the Barrier packed with the 2W2D model from UE or your distributor, or
•  Order Part Number MTL 5012S directly from MTL or any of its distributors.

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Содержание 2W2D

Страница 1: ...NS ONLY THIS EQUIPMENT IS ATEX CERTIFIED SUITABLE FOR APPROPRIATE USE IN GAS ZONE 2 DUST ZONE 22 APPLICATIONS OR GAS ZONE 0 DUST ZONE 20 APPLICATIONS WHEN INSTALLED PER DRAWING A 62174 20 EUROPE 0539 DEMKO 03 ATEX 0322281X 0539 DEMKO 03 ATEX 0322281X II 1 G EEx ia IIC T5 II 3 G EEx nL IIC T5 II 1 D T 90ºC II 3 D T 90ºC 40ºC TAMB 85ºC IP66 40ºC TAMB 85ºC IP66 2W3A MODELS THIS EQUIPMENT IS SUITABLE ...

Страница 2: ...lean and free of debris Use a wrench on the hex pressure connection to tighten Test for leaks On Differential Pressure models the Low L side pressure must NOT exceed the high H side pressure WARNING NEVER INSERT ANY OBJECT INTO THE PRESSURE SENSOR OPENING DAMAGE TO THE SENSOR WILL RESULT AFFECTING ACCURACY Local and Remote Temperature Models For Remote Sensing models C H R Route the extension wire...

Страница 3: ... PAGE 12 FOR ADDITIONAL INFORMATION ON SELECTING AN INTRINSIC SAFETY BARRIER SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY WARNING MODEL 4W3A ACCEPTS 90 130 VAC VDC AS ITS POWER SOURCE THE SWITCHED OUTPUT MAXIMUM LOAD RATING IS 10 A 24 280 VAC AT T amb 38 C 100 F DERATE 1 8 A 10 C 18 F OVERLOADING THE SWITCH MAY CAUSE FAILURE WARNING THE ONE SERIES 8W2D MODEL ACCEPTS 12 30 VDC AS ITS POWE...

Страница 4: ...L1 and L2 terminals Connect the potential free solid state relay at TB1 to an appropriate load Refer to the Switch Ratings Table for the switch ratings The 4W3A has one terminal block labeled TB1 TB1 has four positions marked with L1 L2 and a switch symbol covering the remaining two positions TB1 terminal block accepts 14 22 AWG wiring and the recommended torque is 3 5 in lbs The 8W2D has three te...

Страница 5: ...switch is fully programmable over the entire range of the sensor Reaction time for the One Series to a process change is typically 50 mS or less 2 WIRE SIMPLICITY 2W Models only The One Series 2 Wire electronic pressure switch patented is designed to operate on discrete input leakage current models 2W2D and 2W3A or analog input 4 20 mA loop power models 2WLP41 and 2WLP43 The microprocessor based O...

Страница 6: ...ription of Offset and Span In addition the user can easily access information such as the set point dead band and minimum maximum process readings By pushing the right button once the display will scroll as follows SP1 XX XX DB1 XX XX SP2 XX XX DB2 X XX 8W2D model only By pushing the left button once the display will scroll the min max process values seen MAX XX XX MIN XX XX The display will rever...

Страница 7: ... confirm save the changes and return to the Process Display mode to Discard changes press the right button NO will be displayed Press both buttons to confirm discard the changes and return to the Process Display mode KEY PROGRAMMING FEATURES SWITCH MODE The One Series allows the switch output to be set up for either 3 state I Am Working or 2 state operation For an overview of the I Am Working IAW ...

Страница 8: ...usly captures the readings from the sensor and stores the minimum and maximum values since the last time they were reset These can be viewed at any time by pushing the left button The display will scroll the information and then return to the Process Display mode To reset these values enter the Programming Mode see page 6 use the left button to get to the CLR MAX MIN command and press the right bu...

Страница 9: ...resents the expected variation in the process variable The number is limited to 10 of the full scale range of the sensor The diagram below illustrates the feature s operation T0 Process variable ramp up T1 Process variable stabilizes new thresholds calculated T2 Threshold exceeded new thresholds calculated timer reset T3 Low threshold exceeded new thresholds calculated timer reset T4 Plugged Port ...

Страница 10: ... diagnostics are capable of detecting many possible fault conditions Some fault conditions will clear automatically when the parameter returns to normal others require the unit to be powered down and restarted and some are catastrophic and require repair or replacement A list of fault conditions is shown below DISPLAY WILL SCROLL FAULT RESULT SWITCH OUTPUT 4 20 mA OUTPUT PLUG Plugged Port Detected...

Страница 11: ...an help Please have the manufacturer s model number ready when you call us In rare cases when the series resistor value is too large and falls out of the Acceptable Range placing another resistor across the input will allow it to work Please call 617 926 1000 Technical Sales for assistance Please note that a maximum of 30 VDC supply voltage and a load of 40 mA must not be exceeded or permanent dam...

Страница 12: ...ty barriers must be installed with a suitable 1Ω earth ground Isolated barriers offer simplified installation since there is no requirement for the ground but are generally more expensive than the diode safety barriers Shunt Diode Safety Barriers The entity parameters of diode safety barriers suitable for use with the 2W2D models are V max 28 Volts I max 93 mA Because the 2W2D model derives its op...

Страница 13: ...IM_ONE 01 13 www ueonline com PROCESS DISPLAY ...

Страница 14: ...14 IM_ONE 01 www ueonline com Models 8W2D and 2WLP Dual Conduit shown with Temperature Sensor Models 4W3A 2W2D and 2W3A Single Conduit shown with Gauge Pressure Sensor DIMENSIONAL DRAWINGS ...

Страница 15: ...IM_ONE 01 15 www ueonline com Temperature Model L Temperature Model R SENSOR OPTIONS Gauge Pressure 1 2 NPT female Temperature Models H C Differential Pressure ...

Страница 16: ...ca tions where damage could endanger property or personnel Electrical ratings stated in literature and on nameplate must not be exceeded Overload on a switch can cause damage even on the first cycle Wire unit according to local and national electrical codes using wire size recommended in installation sheet Do not mount unit in ambient temp exceeding published limits LIMITED WARRANTY Seller warrant...

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