Yokogawa ADMAG AXR - Manual (Page 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 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 (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 flameproof
packing adapter approved by Yokogawa.
The flameproof metal conduit wiring for TIIS
flameproof type is not 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
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)
ш10.0(0.39)
ш12.0(0.47) ш20.0
(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
flameproof packing adapter for waterproofing.
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 flameproof packing
adapter setting. (refer to 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.
(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 flameproof packing adapter into the
terminal box until the O-ring touches the wiring
port (at least 6 full turns), and firmly tighten the
lock nut.