Ashcroft A2X - Pressure Transmitter Instrukcja Użytkownika Pobierz pdf (Strona 2)

Power Supply

Power Supply Voltage

Output Signal Min Max

0-5Vdc 10V 30V

1-5Vdc 10V 30V

1-6Vdc 10V 30V

0-10V 14V 30V

4-20mA* 12V 30V**

* For transmitters with 4-20mA output

signal, the minimum voltage at the temi-

nals is 12Vdc. However, the minimum

supply voltage should be calculated

using the following graph and formula.

** For Intrinsically Safe Installations max,

supply voltage is 30Vdc. Refer to

Ashcroft drawing #825A022 for wiring

and installation requirements.

A2X EXPLOSION/FLAME PROOF

PRESSURE TRANSMITTER

INSTRUCTION SHEET

Mounting

The A2X transmitter requires no special

mounting hardware, and can be mounted

in any plane with negligible position error.

Although the unit can withstand normal

vibration without damage or significant

output effects, it is always good practice

to mount the transducer where there is

minimum vibration.

For units with NPT type pressure fittings

apply Teflon

tape or an equivalent

sealant to the threads before installing.

When tightening, apply a wrench to the

hex wrench flats located just above the

pressure fitting. DO NOT tighten by using

a pipe wrench on the housing.

Noise

or minimum noise susceptibility, avoid

running the transducer’s leads in a con-

duit that contains high current AC power

cables. Where possible avoid running

the cable near inductive equipment.

Sintered Metal Filter

All units less than 500 psi include a small

metal sintered filter at the top of the unit.

his is necessary to equalize the internal

pressure with atmospheric pressure but

can be a point of moisture ingress.

Vmin = 12V+ (.022A x RL) (includes a 10% safety factor)

RL = RS + RW

RL = Loop Resistance (ohms)

RS = Sense Resistance (ohms)

RW = Wire Resistance (ohms)

1000

800

600

400

200

20 30

Operating

Region

30 Vdc max for

Intrinsically Safe

Installations

Loop Supply Voltage (Vdc)

Loop Supply Voltage vs. Loop Resistance

Loop Resistance (Ohms)

–

POWER

SUPPLY

(+)

(–)

RANSDUCER

–

V+

V–

IN 1

IN 2

4-20mA

ETER

R OTHER DEVICE

–

POWER

SUPPLY

METER

OR OTHER DEVICE

TRANSDUCER

(Common)

(+ Power)

(+ Output)

PIN 1

PIN 2

PIN 3

3-Wire Voltage

A2X Wiring Diagrams

A2X transducer has internal transient

protection: for safety, limit line-to-

ground voltage to 36 Vdc max.

All sales subject to standard terms and conditions of sale.

I&M011-10167-A2X. Rev. 02/14

HAZARDOUS AREA CERTIFICATIONS

Explosion Proof* – cUL: Specify A2X

Class I, Div. 1 & 2, Groups A, B, C and D

Class II, Div. 1 & 2, Groups E, F and G

Flame Proof* – ATEX: Specify A2X

Compliance with standards

EN 60079-0: 2012

and

EN 60079-1: 2007

II 2 G

Ex d IIC T4 Gb

-40°C ≤ Tamb. ≤ 125°C

DEMKO 04 ATEX 0237942

Intrinsically Safe (applies to 4-20mA) FM/CSA:

Intrinsic Safety: Class I, II and III Div.1 and 2,

Groups A, B, C, D, F and G per

entity requirements see Ashcroft

drawing # 825A022

Non-Incendive: Class I, II and III Div.1 and 2,

Groups A, B, C, D, F and G, no

barriers needed

* Model A2X enclosure is intended for

installation using metallic conduit and

requires installer to comply with appropri-

ate codes to complete proper installation

to meet the assigned hazardous area

designation.

.830

FLYING LEADS

ELE CTR ICA L TE RMI NATI ON

CONDUIT - 1/2 NPT MALE

(C2), (C5)

1.062

Wire Voltage Current

olor Output Output

Red (+) Power (+) Power

White (+) Output None

Black (-) Power (-) Power

Wire Voltage Current

Color Output Output

Red (+) Power (+) Power

White (+) Output None

Black (-) Power (-) Power

.830

PIGTAIL

ELE CTR ICA L TE RMI NATI ON

CONDUIT - 1/2 NPT MALE

(C1), (P7)

1.062

SHIELDED CABLE (PIG TAIL)

ELECTRICAL TERMINATION

CONDUIT - 1/2NPT MALE

(C1), (C6), (C7), (P7)

* Installation of conduit leads should be limit-

ed to 3m to maintain CE compliance

1 2

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