<14. EXPLOSION PROTECTED TYPE INSTRUMENT>
14-7
IM 01E30D01-01EN
WARNING
IftheAXRismountedinanareawherethe
use of EPL Db equipment is required, it shall
be installed in such a way that the risk from
electrostatic discharges and propagating brush
dischargescausedbyrapidowofdustis
avoided.
(2) Electrical Connection
The type of electrical connection is stamped near
the electrical connection port according to the
following codes.
ISO M20x1.5 female M
ANSI 1/2NPT female N
Screw Size Marking
(3) Installation
WARNING
• Groundingresistanceof100Ωorlessis
necessary.
When optional code A is selected, grounding
resistanceof10Ωorlessshallberequired.
• AllwiringshallcomplywithIEC60079-14,
and local installation requirements and local
electrical code.
• Inhazardouslocations,thecableentry
devicesshallbeofacertiedIECEx
ameprooftype,suitablefortheconditionsof
use and correctly installed.
• Unusedaperturesshallbeclosedwith
suitableameproofcertiedblanking
elements.(Theplugattachediscertiedas
theameproofandIP66orIP67asapartof
this apparatus.)
• IncaseofANSI1/2NPTplug,ANSI
hexagonal wrench should be applied to
screw in.
• Inordertopreventthegroundingring
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.
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).
F1405.ai
1) Internal grounding
terminal
External grounding
Figure 14.4 Wiring Procedure for Grounding
Terminals
(4) Operation
WARNING
• Afterde-energizing,delay5minutesbefore
opening.
• Takecarenottogeneratemechanical
spark when access to the instrument and
peripheral devices in hazardous locations.
(5) Maintenance and Repair
WARNING
Only personnel authorized by Yokogawa Electric
Corporation can repair the equipment.
WARNING
• Electrostaticchargemaycauseanexplosion
hazard. Avoid any actions that cause the
generation of electrostatic charge, such as
rubbing with a dry cloth on coating face of
product.
• Modicationoftheameproofjointisnot
allowed.