<14. EXPLOSION PROTECTED TYPE INSTRUMENT>
14-9
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 flameproof packing adapters,
select optional code G32 with G11.
(2) Wiring Installation
For the external wiring of flameproof types, use
a flameproof packing adapter (optional code
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
Available only for wiring of using a flameproof
packing adapter approved by Yokogawa.
The flameproof metal conduit wiring for TIIS
flameproof type is no
t permitted.
(2-1) Wiring Cable through Flameproof Packing
Adapter
WARNING
For the TIIS flameproof type with wiring using a
flameproof 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
F1406.ai
Nominal diameter
Dimension
Cable outer
diameter
Packing diameter
Identifi
-
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
• Apply a nonhardening sealant to the terminal
box connection port and to the threads on the
flameproof packing adapter for waterproofing.
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
Follow the procedure for flameproof packing
adapter setting. (Read Figure 14.5.3)
CAUTION
Before fighting, confirm cable length from
terminal to flameproof packing adapter when
setting. Once it is tightened, loosening and re-
tightening may damage its sealing performance.