Ashcroft A2X Foglio di istruzioni - Pagina 2

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A2X EXPLOSION/FLAME PROOF

PRESSURE TRANSDUCER

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 mini-

mum vibration.

1.062

For units with NPT type pressure fittings

PROCESS

FITTING

apply Teflon

tape or an equivalent sealant

(REF.)

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.

Power Supply

.600

Power Supply Voltage

Output Signal

Min

0-5Vdc

10V

1-5Vdc

10V

(4) PIN BENDIX STYLE

ELECTRICAL TERMINATION

1-6Vdc

10V

SHELL SIZE 8

0-10V

14V

(B4), (H1), (L1), (P2)

4-20mA*

12V

* For transmitters with 4-20mA output

signal, the minimum voltage at the tem-

inals 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 installa-

tion requirements.

Loop Supply Voltage vs. Loop Resistance

1000

30 Vdc max for

Intrinsically Safe

800

Installations

600

400

Operating

Region

200

Loop Supply Voltage (Vdc)

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)

All sales subject to standard terms and conditions of sale. A2X_transducer_im_ RevB_(009-10167)_09-18

Noise

For 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.

This is necessary to equalize the internal

pressure with atmospheric pressure but

1.062

1.000

can be a point of moisture ingress.

A2X Wiring Diagrams

POWER

SUPPLY

–

PIN 1

.830

PIN 2

Max

–

30V

METER

30V

OR OTHER DEVICE

PIGTAIL

ELECTRICAL TERMINATION

30V

CONDUIT - 1/2 NPT MALE

30V

POWER

(C1), (P7)

SUPPLY

30V**

–

ELECTRICAL TERMINATIONS FOR

–

WELDED HOUSINGS ONLY

EXCLUDING EXPLOSION PROOF

METER

OR OTHER DEVICE

A2X transducer has internal transient

protection: for safety, limit line-to-

ground voltage to 36 Vdc max.

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,

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

Model A2X enclosure is intended for

installation using metallic conduit and

requires installer to comply with appro-

priate codes to complete proper instal-

lation to meet the assigned hazardous

area designation.

(+)

V+

TRANSDUCER

(–)

V–

4-20mA

PIN 1

(+ Power)

PIN 2

(Common)

TRANSDUCER

(+ Output)

PIN 3

3-Wire Voltage

1.062

PROCESS

FITTING

1.000

(REF.)

.600

(4) PIN BENDIX STYLE

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

ELECTRICAL TERMINATION

entity requirements see Ashcroft

SHELL SIZE 8

drawing # 825A022

(B4), (H1), (L1), (P2)

B, C, D, F and G, no

ELECTRICAL TERMINATIONS FOR

barriers needed

WELDED HOUSINGS ONLY

EXCLUDING EXPLOSION PROOF

Wire

Voltage

Color

Output

Red

(+) Power

White

(+) Output

Black

(-) Power

1.062

.830

FLYING LEADS

ELECTRICAL TERMINATION

CONDUIT - 1/2 NPT MALE

(C2), (C5)

ELECTRICAL TERMINATION FOR

Installation of conduit leads should be limit-

ed to 3m to maintain CE compliance

WELDED HOUSINGS ONLY

INCLUDING EXPLOSION PROOF

Wire

Voltage

Current

Color

Output

Red

(+) Power

White

(+) Output

None

Black

(-) Power

1.062

.830

SHIELDED CABLE (PIG TAIL)

PIGTAIL

ELECTRICAL TERMINATION

CONDUIT - 1/2NPT MALE

CONDUIT - 1/2 NPT MALE

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

(C1), (P7)

Current

Output

None