<6. Wiring>
6-4
IM 01C25K01-01E
■ Four wire connection
Fasten the negative side wiring of both power
supply and signal line to the SUPPLY - terminal.
Hazardous Location
Nonhazardous Location
Transmitter terminal box
Distributor
(Power supply unit)
Receiver
instrument
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Figure 6.12 Connection between Transmitter,
Distributer and Receiver
6.4.2 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 6.13 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 6.14 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 6.15 Typical Wiring Using Flameproof Metal
Conduit
