Fujimoto Fuji Differential Pressure Transmitter FKK 4 User Manual

Page 73

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67

Figure 1. FCX-A/C Series transmitter, Intrinsically Safe Installation for BASEEFA

Notes:

1.

The electrical circuit in the hazardous area must be capable of withstanding an A.C. test

voltage of 500 volts rms to earth of frame of the apparatus for one minute.

2.

The capacitance and inductance of the hazardous area cables must not exceed the values

shown in Table 1.

3.

The installation, including barrier earthing arrengements, must comply with the installation

requirements of the country of use.

e.g. in the U.K., BS 5345: Part 4:1977

4.

Any shunt zenor diode safety barrier certified by an EEC Approved Body to [EEx ia] IIC

having the following maximum parameters;

Uz = 28 Vdc, Imax;out = 93 mAdc, Wmax;out = 0.65 W

The output current of the barrier must be limited by a resistor “R” that;

Imax; out = Uz / R

CK+

CK–

+

+

FXE

CK+

CK–

+

FXE

CK+

CK–

Shunt Bar

+

FXE

CK+

CK–

+

FXE

FCX-A/C Series Transmitter

BAS No. Ex 95D2444

EEx ia IIC T4 (Ta

<

85

°C)

EEx ia IIC T5 (Ta

<

40

°C)

FXW

Hand Held Communicator

BAS No. Ex 90C2370X

EEx ia IIC T3 (Ta

<

85

°C)

EEx ia IIC T4 (Ta

<

40

°C)

=

=

FXE

Field Indicator

BAS No. Ex 93C2154

EEx ia IIC T4 (Ta

<

85

°C)

EEx ia IIC T5 (Ta

<

50

°C)

N = (n

1

+ n

2

)

<

3 (for IIC, IIB, IIA)

=

=

=

=

=

The HART Communicator

BAS No. Ex 92C2516

Hazardous Area

Non-hazardous Area

or

Measurement Technology Ltd.

Communicator

MTL611 BAS No. Ex 91C2323

CNF61 BAS No. Ex 91C2071

or

Field Indicator (FXE)

n

1

n

2

Field Indicator (FXE)

CK+

CK–

+

FXE

CK+

CK–

CK+

CK–

+

FXE

BARRIER

(See Note 4)

NON-HAZARDOUS AREA APPARATUS

FCX-A/C Series Transmitter System

SYST BAS No. EX 95D2445

Fuji Electric Co., Ltd.

System Label

Which is unspecified except that it must

not be supplied from nor contain under

normal or abnormal conditions, a source

of potential with respect to earth in excess

of 250 volts RMS or 250 volts DC.

(See Note 3)

Ex

Table 1: Cable Parameters

Capacitance [µF]

<

3

0.085

0.265

0.715

IIC

IIB

IIA

Group

N

<

3

1.6

5.6

15.6

<

3

55

165

440

Inductance [mH] or L/R Ratio [µH/

]

==

N: Number of field indicator (FXE)

<

3

=

=

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