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WARNING
If the AXR is mounted in an area where the
use of EPL Db equipment is required, it shall
be installed in such a way that the risk from
electrostatic discharges and propagating brush
discharges caused by rapid flow of dust is
avoided.
(2) Electrical Connection
The type of electrical connection is stamped near
the electrical connection port according to the
following codes.
Screw Size
Marking
ISO M20x1.5 female
M
ANSI 1/2NPT female
N
F1401.ai
(3) Installation
WARNING
• Grounding resistance of 100 Ω or less is
necessary.
When optional code A is selected, grounding
resistance of 10 Ω or less shall be required.
• All wiring shall comply with IEC 60079-14,
and local installation requirements and local
electrical code.
• In hazardous locations, the cable entry
devices shall be of a certified IECEx
flameproof type, suitable for the conditions of
use and correctly installed.
• Unused apertures shall be closed with
suitable flameproof certified blanking
elements. (The plug attached is certified as
the flameproof and IP66 or IP67 as a part of
this apparatus.)
• In case of ANSI 1/2 NPT plug, ANSI
hexagonal wrench should be applied to
screw in.
• In order to prevent the grounding ring
conductor from loosening, the conductor
must be secured to the terminal, tightening
the screw with appropriate torque. Care must
be taken not to twist the conductor.
<14. EXPLOSION PROTECTED TYPE INSTRUMENT>
The grounding terminals are located on the inside
and outside of the terminal area.
Connect the cable to grounding terminal in
accordance with wiring procedure 1) or 2).
1) Internal grounding
terminal
2) External grounding
terminal
Figure 14.4
(4) Operation
• After de-energizing, delay 5 minutes before
opening.
• Take care not to generate mechanical
spark when access to the instrument and
peripheral devices in hazardous locations.
(5) Maintenance and Repair
Only personnel authorized by Yokogawa Electric
Corporation can repair the equipment.
• Electrostatic charge may cause an explosion
hazard. Avoid any actions that cause the
generation of electrostatic charge, such as
rubbing with a dry cloth on coating face of
product.
• Modification of the flameproof joint is not
allowed.
Wiring Procedure for Grounding
Terminals
WARNING
WARNING
WARNING
14-7
F1405.ai
IM 01E30D01-01EN
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