SMAR FY301, Instruction, Operations & Maintenance Manual

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FY301 – Operation, Maintenance and Instructions Manual
1.8
Reach the wiring block by removing the electrical connection cover. This cover can be locked closed
by the cover locking screw. To release the cover, rotate the locking screw clockwise. See figure 1.7.
Figure 1.7 - Cover Locking Bolt
Electric Wiring
The access to the signal cables to the terminal wiring can be done through of one of the electronic
housing orifices and can be connected to a conduit. The wiring block has screws on which fork or
ring-type terminals can be fastened. See figure 1.8. Use a plug to block the electrical connection not
used. Tight it well and use thread sealing tape.
If the user choose protection against noise induced by atmospheric discharges, overloads, weld
machines and machines in general, it will be necessary to install a transient protector (Protector
acquired separately).
Test and communication terminals allow, respectively, to measure the current in the 4 - 20 mA loop,
without opening it, and to communicate with the transmitter. To measure it, connect a multimeter in
the mA scale in the "

" and "

" terminals, and to communicate, use a Hart® configurator in the
"COMM" and "  " terminals. For convenience, there are three ground terminals: one inside the
cover and two externals, located close to the conduit entries.
Attention to prevent the accidental feeding of the test terminals. This occurrence will cause damages
in the equipment.
Figure 1.8 - Wiring Block
HAZARDOUS AREAS
In hazardous areas with explosion proof requirements, the covers must be tightened with at least 8 turns. In
order to avoid the penetration of humidity or corrosive gases, tighten the o-ring until feeling the o-ring
touching the housing. Then, tighten more 1/3 turn (120
°
) to guarantee the sealing. Lock the covers using
the locking bolts.
Conduit threads should be sealed by means of code-approved sealing methods.
Explosion proof, non-incendive and intrinsic safety certification are standards for
FY301
.
For a complete list of available certificates, please consult
http://www.smar.com
.