YOKOGAWA AXFA14G - Page 84

<10. Explosion Protected Type Instrument>
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IM 01E20A01-01EN
• Gas Group and Temperature Class: IIC T4
• Ambient Temperature: –20 to 60°C
• Fluid Temperature: 120°C max
• Electrode Circuit: 250 V AC/DC
• Grounding:JISClassC(groundingresistance10Ωor
less)orJISClassA(groundingresistance
10Ωorless)
(AXFA14 Remote Converter)
• Certicate:TC16678
• Construction: Ex d IIC T6
: Explosion proof
• Gas Group and Temperature Class: IIC T6
• Ambient Temperature: –20 to 60°C (power supply
code 1)
: –20 to 50°C (power supply
code 2)
• Maximum power supply voltage: 250V AC/130V DC
• Grounding:JISClassC(groudingresistance10Vor
less)orJISClassA(groundingresistance
10V or less)
WARNING
In case that ambient temperature exceeds 50°C,
use heat-resistant cables with maximum allowable
temperature of 70°C or above.
WARNING
IncaseofTIISFlameprooftype,aremoteowtubeis
available for combined use with the AXFA14 converter
only.
(2) Wiring Installation
Fortheexternalwiringofameprooftypes,usea
ameproofpackingadapterapprovedbyYokogawa(refer
toFigure10.5.2)orcablewiringusingaameproofmetal
conduit(refertoFigure10.5.4and“INSTALLATIONAND
OPERATING PRECAUTIONS FOR TIIS FLAMEPROOF
EQUIPMENT”attheendofthismanual).
NOTE
ThissectiondescribestheIntegralowmeterasan
example. The same attention must be paid to the
remoteowtubeandremoteconverter.
(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 G12, G11, G14 or G13).
In case that optional code G11 or G13 is selected, it
comes with a blanking plug.
Then always apply it to the unused wiring port.
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)
G9601AM
Parts
No.
Packing diameter
Cable outer diameter
T1 T2
C D
L
Dimension
G 1/2
Nominal diameter
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
F1021.ai
Figure 10.5.1 Flameproof Packing Adapter
• Apply a non-hardening sealant to the terminal box
connectionportandtothethreadsontheameproof
packingadapterforwaterproong.
• Eitheraameproofpackingadapterorablanking
plug must be applied to every wiring port.
In case that optional code G11 or G13 is selected, it
comes with a blanking plug.
Then always apply it to the unused wiring port.
If the blanking plug is necessary, always purchase it
(parts number: G9330DP) from Yokogawa.
Flameproof
packing adapter
Wiring metal
conduit
Flexible metal conduit
Tee
Drain plug
F1022.ai
Apply a blanking
plug to the unused
wiring port
Apply a non-hardening
sealant to the threads of these
fittings for waterproofing.
Figure 10.5.2 Typical Wiring Using Flexible Metal Conduit
Explosion Protected Type Instrument
10