Yokogawa EJX115A - Manual (Page 33)

<5. Wiring>
31
IM 01C25A01-01E
5.3.2 Wiring Installation
(1) General-use Type and Intrinsically Safe
Type
With the cable wiring, use a metallic conduit or waterproof
glands.
• Apply a non-hardening sealant to the terminal box
connection port and to the threads on the flexible
metal conduit for waterproofing.
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Flexible metal conduit
Wiring metal
conduit
Tee
Drain plug
Apply a non-hardening
sealant to the threads for
waterproofing.
Figure 5.10 Typical Wiring Using Flexible Metal
Conduit
(2) Flameproof Type
Wire cables through a flameproof packing adapter, or use
a flameproof metal conduit.
 Wiring cable through flameproof packing adapter.
• Apply a non-hardening sealant to the terminal box
connection port and to the threads on the flameproof
packing adapter for waterproofing.
Flameproof packing
adapter
Flexible metal conduit
Wiring metal
conduit
Tee
Drain plug
Apply a non-hardening
sealant to the threads for
waterproofing.
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Figure 5.11 Typical Cable Wiring Using Flameproof
Packing Adapter
 Flameproof metal conduit wiring
• A seal fitting must be installed near the terminal box
connection port for a sealed construction.
• Apply a non-hardening sealant to the threads of the
terminal box connection port, flexible metal conduit
and seal fitting for waterproofing.
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Non-hazardous area
Hazardous area
Flameproof
heavy-gauge
steel conduit
Tee
Drain plug
Seal fitting
Gas sealing device
Flameproof flexible
metal conduit
Apply a non-hardening
sealant to the threads of
these fittings for
waterproofing
After wiring, impregnate the fitting
with a compound to seal tubing.
Figure 5.12 Typical Wiring Using Flameproof Metal
Conduit
5.4 RTD Cable Connection
(EJX910A/EJX930A)
Connection of the RTD cable is always required to
measure external temperature. Follow the procedures
below to connect a cable when a cable gland or a conduit
is used.
5.4.1 Connecting Shielded Cable with
Cable Gland (External temperature
input code: -1, -2, -3, and -4)
• RTD connection components: EJX multivariable
transmitter, two cable glands, and RTD cable.
Two cable glands are attached.
Transmitter
Cable gland
Electrical connection
RTD cable
with connector
Detail of connector
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Y L P P U S
ESL UP
K C E H C M R A L A
• Magnified view of the RTD connector in the
transmitter's terminal box.
SUPPL
Y
PULSE
CHECK
ALARM
SUPPL
Y
PULSE
CHECK
ALARM
Protection Cap Connecting Port
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The RTD cable connecting port is covered with a cap to
keep out dust. The cap should not be removed until you
are ready to install the cable.
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irin
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