Rtd Cable Connection (Ejx910A/Ejx930A) - YOKOGAWA EJX110A Installation Manual

(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
Figure 5.16 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.
Gas sealing device
Non-hazardous area
Hazardous area
Flameproof
heavy-gauge
steel conduit
Tee
Seal fitting
After wiring, impregnate the fitting
Drain plug
with a compound to seal tubing.
Figure 5.17 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)
Apply a non-hardening
sealant to the threads for
waterproofing.
F0512.ai
Flameproof flexible
metal conduit
Apply a non-hardening
sealant to the threads of
these fittings for
waterproofing
F0513.ai
<5. Wiring>
• RTD connection components: EJX multivariable
transmitter, two cable glands, and RTD cable.
Two cable glands are attached.
Electrical connection
Transmitter
• Magnified view of the RTD connector in the
transmitter's terminal box.
Protection Cap
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.
• Components for the cable gland
The cable gland assembly consists of an entry, seal,
running coupler, and backnut. Confirm that the seal is
attached inside the entry and that the thread size of the
cable gland is the same as that for the RTD electrical
connection.
1/2NPT Type
Running
Entry with Seal
Coupler
M20 Type
Entry with Seal
Gasket
CAUTION
Input/output signal is non-isolated.
Do not turn on power supply until you complete all the
wiring work.
45
Cable gland
RTD cable
with connector
Detail of connector
F0514.ai
Connecting Port
F0515.ai
Backnut
Running
Backnut
Coupler
IM 01C25A01-01E