<14. EXPLOSION PROTECTED TYPE INSTRUMENT>
14-9
IM 01E30D01-01EN
Intrinsically safety circuit
• MaximumVoltage(Uo):14V
• MaximumCurrent(Io):17mA
• MaximumElectricalPower(Po):0.12W
Fluid Temperature: –20 to 130°C
Ambient Temperature: –20 to 55°C
Grounding:
Groundingresistanceof10Ωorlessis
necessary for class A grounding terminal.
Groundingresistanceof100Ωorlessis
necessary for Functional grounding terminal.
When the optional code A is selected,
groundingresistanceof10Ωorlessshallbe
required.
IMPORTANT
Class A grounding should be installed in non-
hazardrous area.
Flameproot packing adapter:
The specifying optional code G11 is necessary.
Incaseoftwoameproofpackingadapters,
select optional code G32 with G11.
(2) Wiring Installation
Fortheexternalwiringofameprooftypes,use
aameproofpackingadapter(optionalcode
G11, G32) approved by Yokogawa (Read Figure
14.5.2) (Read “INSTALLATION AND OPERATING
PRECAUTIONS FOR TIIS FLAMEPROOF
EQUIPMENT” at the end of this manual).
WARNING
Availableonlyforwiringofusingaameproof
packing adapter approved by Yokogawa.
TheameproofmetalconduitwiringforTIIS
ameprooftypeisnot permitted.
(2-1) Wiring Cable through Flameproof Packing
Adapter
WARNING
FortheTIISameprooftypewithwiringusinga
ameproofpackingadapter,wirecablesthrough
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
F1406.ai
Nominal diameter Dimension
Cable outer
diameter
Packing diameter Identi-
cation
mark
Weight
kg
(lb)
Parts No.
T1 T2 C D L F G
G 1/2 G 1/2
35
(1.38)
39
(1.54)
94.5
(3.72)
ø8.0 to ø10.0
(0.31 to 0.39)
ø10.0(0.39)
ø20.0
(0.79)
16 8-10
0.26
(0.57)
G9601AM*
ø10.0 to ø12.0
(0.39 to 0.47)
ø12.0(0.47)
16 10-12
*: G 11: 1 unit
G 11 with G 32: 2 units
Figure 14.5.1 Flameproof Packing Adapter
• Applyanonhardeningsealanttotheterminal
box connection port and to the threads on the
ameproofpackingadapterforwaterproong.
Flameproof
packing adapter
Wiring metal
conduit
Flexible metal conduit
Tee
Drain plug
F1407.ai
Apply a
non-hardening
sealant to the threads
for waterproofing.
Figure 14.5.2 Typical Wiring Using Flexible Metal
Conduit
Followtheprocedureforameproofpacking
adapter setting. (Read Figure 14.5.3)
CAUTION
Beforeghting,conrmcablelengthfrom
terminaltoameproofpackingadapterwhen
setting. Once it is tightened, loosening and re-
tightening may damage its sealing performance.