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IM 1C21D1-01E
2-8
2. HANDLING CAUTIONS
Note 4. Operation
• Keep the “CAUTION” label to the transmitter.
CAUTION: WAIT 10 MIN. AFTER
POWER-DISCONNECTION, BEFORE
OPENING THE ENCLOSURE.
WHEN THE AMBIENT TEMP.
^
70
°
C,
USE HEAT-RESISTING CABLES
^
90
°
C.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
Note 5. Maintenance and Repair
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation is prohibited and
will void KEMA Flameproof Certification.
c. IEC (KEMA) Type of Protection “n”
Caution for IEC (KEMA) Type of Protection “n.”
Note 1. Model EJA-A Series pressure transmit-
ters with optional code /KU1 for poten-
tially explosive atmospheres.
• Type of Protection and Marking Code:
Ex nA IIC T4
• Temperature Class: T4
• Process Temperature: 120
°
C max.
• Ambient Temperature: –40 to 60
°
C
Note 2. Electrical Data
• Supply and output circuit
≤
30 V dc, 165 mA
(ter and –)
Note 3. Installation
• All wiring shall comply with local installation
requirements. (refer to the installation diagram)
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 KEMA Type of Protection “n” Certifica-
tion.
Power Supply
(Zone 2 only)
Transmitter
Supply
Nonhazardous Location
[Installation Diagram]
Hazardous Location
+
–
+
–
F0209.EPS
Ratings of the Power Supply as follows;
Maximum Voltage: 30 V
Maximum Current: 165 mA
d. CENELEC (KEMA) Intrinsically Safe Type/
CENELEC (KEMA) Flameproof Type/IEC
(KEMA) Type of Protection “n”
Model EJA-A Series pressure transmitters with
optional code /KU1 can be selected the type of
protection (CENELEC (KEMA) Intrinsically
Safe or CENELEC (KEMA) Flameproof or IEC
(KEMA) Type of Protection “n”) for use in
hazardous locations.
Note 1. For the installation of this transmitter,
once a particular type of protection is
selected, any other type of protection
cannot be used. The installation must be
in accordance with the description about
the type of protection in this instruction
manual.
Note 2. In order to avoid confusion, unnecessary
marking is crossed out on the label other
than the selected type of protection when
the transmitter is installed.
2.10 EMC Conformity Standards
For EMI (Emission): EN55011, AS/NZS 2064 1/2
For EMS (Immunity): EN50082–2
NOTE
YOKOGAWA recommends customer to apply
the Metal Conduit Wiring or to use the twisted
pair Shield Cable for signal wiring to conform the
requirement of EMC Regulation, when customer
installs the EJA Series Transmitters to the plant.