Yokogawa ADMAG AXR Manual de usuario descargar pdf (Pagina 184)

<14. EXPLOSION PROTECTED TYPE INSTRUMENT>

14-7

IM 01E30D01-01EN

 Intrinsically safety circuit

• Maximum Voltage (Uo): 14 V

• Maximum Current (Io): 17 mA

• Maximum Electrical Power (Po): 0.12 W

 Fluid Temperature: -20 to 130°C

 Ambient Temperature: –20 to 55°C

 Grounding:

Groundingresistanceof10Ωorlessis

necessary for class A grounding terminal.

Groundingresistanceof100Ωorlessis

necessary for Functional grounding terminal.

When the optional code A is selected,

groundingresistanceof10Ωorlessshallbe

required.

IMPORTANT

Class A grounding should be installed in non-

hazardrous area.

 Flameproot packing adapter:

The specifying optional code G11 is necessary.

Incaseoftwoameproofpackingadapters,

select optional code G32 with G11.

(2) Wiring Installation

Fortheexternalwiringofameprooftypes,usea

ameproofpackingadapter(optionalcodeG11,

G32) approved by Yokogawa (refer to Figure

14.5.2) (refer to “INSTALLATION AND OPERATING

PRECAUTIONS FOR TIIS FLAMEPROOF

EQUIPMENT” at the end of this manual).

WARNING

Availableonlyforwiringofusingaameproof

packing adapter approved by Yokogawa.

TheameproofmetalconduitwiringforTIIS

ameprooftypeisnot permitted.

(2-1) Wiring Cable through Flameproof Packing

Adapter

WARNING

FortheTIISameprooftypewithwiringusinga

ameproofpackingadapter,wirecablesthrough

the packing adapters approved by Yokogawa

(optional code G11, G32).

T1

T2

L

18(0.71)

G

F

D

C

16.5(0.65)

*Packing

(Choose from the table below

depend on cable outside diameter)

Unit : mm

(Approx. inch)

Adapter body(M. Screw)

Packing case

Hexagon socket set screw

O-Ring

Packing *

O-Ring

O-Ring

Washer

Union nut

Packing gland

Clamp ring

Clamp nut

O-Ring

B.coupling

Cable(user's scope)

Hexagon socket set screw

0.26

(0.57)

ø8.0 to ø10.0 (0.31 to 0.39)

ø10.0 to ø12.0 (0.39 to 0.47)

16 8-10

16 10-12

Identification

mark

Weight

kg

(lb)

Packing diameter

Cable outer diameter

T1 T2 C D

L

Dimension

G 1/2 G 1/2

35

(1.38)

39

(1.54)

94.5

(3.72)

ø10.0(0.39)

ø12.0(0.47)

ø20.0

(0.79)

F G

F1405.ai

Figure 14.5.1 Flameproof Packing Adapter

• Apply a nonhardening sealant to the terminal

box connection port and to the threads on the

ameproofpackingadapterforwaterproong.

Flameproof

packing adapter

Wiring metal

conduit

Flexible metal conduit

Tee

Drain plug

F1406.ai

Apply a

non-hardening

sealant to the threads

for waterproofing.

Figure 14.5.2 Typical Wiring Using Flexible Metal

Conduit

Followtheprocedureforameproofpacking

adapter setting. (refer to Figure 14.5.3)

CAUTION

Beforeghting,conrmcablelengthfrom

terminaltoameproofpackingadapterwhen

setting. Once it is tightened, loosening and re-

tightening may damage its sealing performance.

(a) Loosen the locking screw and remove the

terminal box cover.

(

b) Measure the cable outer diameter in two

directions to within 0.1 mm.

(c) Calculate the average of the two diameters, and

use packing with an internal diameter nearest to

this value (see Table of the Figure 14.5.1).

(d) Screwtheameproofpackingadapterintothe

terminal box until the O-ring touches the wiring

port(atleast6fullturns),andrmlytightenthe

lock nut.

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