Dresser Masoneilan SVI II AP Manuale di avvio rapido - Pagina 18

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Dresser Masoneilan SVI II AP Manuale di avvio rapido

I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d S S e e t t U U p p

SVI II AP Setups

6. 6.

Capacitance of the signaling circuit must not exceed 0.26

microfarads or 0.10 microfarads with high series

resistance.

7. 7.

Cabling must be shielded to prevent electrical noise that

Cabling must be shielded to prevent electrical noise

would interfere with the HART tones, with the shield

grounded.

8. 8.

Signal must be properly grounded in only

Signal must be properly grounded in only one place.

Note:

Note: For details and calculation methods for wiring resistance, and

For details and calculation methods for wiring resistance, and

capacitance and for calculation of cable characteristics please

refer to the HART FSK Physical Layer Specification.

refer to the HART FSK Physical

T T ypical system setups are

ypical system setups are shown in

Purpose and Explosion Proof (EEx d)

Purpose and Explosion Proof (EEx d) Installation Schematic and

7 on page 13

7 on page 13, Intrinsically Saf

, Intrinsically Safe Installation

positioner can be located in a general-purpose or hazardous area

protected by Explosion Proof (EEx

protected by Explosion

generalized, actual wiring must adhere

generalized, actual wiring must adhere to Electrical Installation section

of manual

of manual and local electrical

and local electrical codes.

Communicator or a HART modem is not permitted in the Hazardous

Area protected

Area protected by Explosion

by Explosion Proof (EEx

page 13 the SVI II AP positioner is located in a hazardous area

page 13

the SVI II AP positioner is located in a hazardous area that is

protected by Intrinsically Safe wiring practices.

The SVI II AP requires an electrical input from a 4-20 mA current

The SVI II AP requires an electrical input from a 4-20

source. The SVI II AP input signal can carry a HART communication

source. The SVI II AP input signal can carry

protocol signal from ValVue 2.4 or

protocol signal from ValV

modem, or from a HART Hand Held Communicator

modem, or from a HAR

control system, the source of the input signal, is located in a non-

control system, the source of the input signal, is

hazardous location, setup requires an intrinsic safety barrier be placed

hazardous location, setup requires an intrinsic safety barrier be

between the process control sys

between the proc

ess control system and the SVI II A

is located in a hazardous area with Intrinsically Safe protection a barrier

is not required for a flameproof

is not required

for a flameproof installation.

can be installed as Explosion Proof ⁄ ⁄ flameproof. SVI II AP can

can be installed as Explosion Proof

communicate with a remote PC running V

communicate with a remote PC

connected to the PC'

connected to

the PC's serial

intrinsically safe, must be connected to the circuit on the safe area side

of the intrinsic safety barrier if the valve is located in a hazardous area.

The SVI II AP can be operated, calibrated, configured, and interrogated

either by using local pushbutton and display, or by using a PC running

V V alVue 2.4 software, HART Handheld Communi

alVue 2.4 software, HART Handheld Communicator, or any

HART Host that supports DDs.

HART Host t

hat supports DDs. The HART Handheld Com

approved for Intrinsically Safe use in accordance

approved for Intrinsically Safe

standards. Read and

standards.

Read and observe all

polarity sensitive so the positive lead must be connected to the positive

(+) terminal and the negative lead to the negative

(+) terminal and the

of input will not cause damage but the unit will not function.

of input will not cause damage but the unit will

shown in Figure 6 on page 13

Figure 6 on page 13, General

Installation Schematic and Figure

e Installation Schematic.

Proof (EEx d) methods.

d) methods. Wiring diagrams are

codes. The use of

The use of a Handheld

Proof (EEx d) methods.

ue 2.4 or greater software and a

greater software and a HART

T Hand Held Communicator. . Since the process

tem and the SVI II AP P . . If the SVI II

installation. Alternatively the

flameproof. SVI II AP can

running ValVue software via a modem

s serial or USB

or USB port.

port. The PC,

The HART Handheld Communicator is

use in accordance with FM and ATEX

observe all HHC labelling.

HHC labelling. The SVI

negative lead to the negative (-) terminal.

W W i i r r i i n n g g t t h h e e S S V V I I I I I I A A P P

one place.

Layer Specification.

, General

Schematic. The SVI I

The SVI II AP

Wiring diagrams are

to Electrical Installation section

a Handheld

d) methods. In In Figure 7 on

Figure 7 on

mA current

a HART communication

HART

Since the process

located in a non-

If the SVI II AP

Alternatively the system

alVue software via a modem

The PC, which is

which is not

cator, or any registe

municator is

with FM and ATEX

The SVI II AP

(-) terminal. Reversal

not function.

that

Figure

I AP

that is

placed

system

not

registered

red

II AP is is

Reversal