<2. Handling Cautions>
2-15
IM 01C25K01-01E
Note 2. Wiring
• In hazardous locations, the cable entry
devices shall be of a certified flameproof
type, suitable for the conditions of use and
correctly installed.
• Unused apertures shall be closed with
suitable flameproof certified blanking
elements.
•
Wiring connection for output signal code Q
(Low Power type) shall follow the diagram
below.
F0214.ai
Three-Wire Connection
Pressure Transmitters
Power Supply
Voltmeter
SUPPLY –
A
+
–
+
–
Four-Wire Connection
Pressure Transmitters
Power Supply
Voltmeter
SUPPLY –
A
+
–
+
–
Note 3. Operation
• WARNING:
AFTER DE-ENERGIZING, DELAY 5
MINUTES BEFORE OPENING.
• WARNING:
WHEN THE AMBIENT TEMP.≥65°C, USE
HEAT-RESISTING CABLE AND CABLE
GLAND ≥90°C.
• Take care not to generate mechanical
sparking when accessing to the instrument
and peripheral devices in a hazardous
location.
• 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 the
product.
Note 4. Maintenance and Repair
• The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric
Corporation is prohibited and will void IECEx
Certification.
• Electrical Connection
A mark indicating the electrical connection
type is stamped near the electrical
connection port. These marks are as
followed.
F0215.ai
Location of the mark
Screw Size
Marking
ISO M20 × 1.5 female
ANSI 1/2 NPT female
M
N or
W
2.10 EMC Conformity Standards
EN 61326-1 Class A, Table2 (For use in
industrial locations)
EN 61326-2-3
EN 61326-2-5 (for Fieldbus)
CAUTION
• This instrument is a Class A product,
and it is designed for use in the industrial
environment.
Please use this instrument in the industrial
environment only.
• To meet EMC regulations, Yokogawa
recommends that customers run signal
wiring through metal conduits or use
shielded twisted-pair cabling when installing
EJX/EJA-E series transmitters in a plant.
