<2. Handling Cautions>
12
IM 01C22A01-01E
Note 5. Maintenance and Repair
• The instrument modifi cation or parts replacement by
other than authorized representative of Yokogawa
Electric Corporation is prohibited and will void KEMA
Flameproof Certifi cation.
c. CENELEC ATEX (KEMA) Intrinsically Safe
Type/CENELEC ATEX (KEMA) Flameproof
Type/CENELEC ATEX Type n
Model EJA-A Series pressure transmitters with
optional code /KU2 can be selected the type of
protection CENELEC ATEX (KEMA) Intrinsically Safe,
Flameproof or CENELEC ATEX Type 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
user’s 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.
● CENELEC ATEX Type of Protection “n”
WARNING
When using a power supply not having a nonincendive
circuit, please pay attention not to ignite in the
surrounding fl ammable atmosphere.
In such a case, we recommend using wiring metal
conduit in order to prevent the ignition.
• Applicable Standard: EN60079-15
• Referential Standard: IEC60079-0,
IEC60079-11
• Type of Protection and Marking Code: Ex nL IIC T4
• Temperature Class: T4
• Enclosure: IP67
• Process Temperature: 120°C max.
• Ambient Temperature: –40 to 60°C
Note 1. Electrical Data
Ui = 30 V
Effective internal capacitance; Ci = 22.5 nF
Effective internal inductance; Li = 730 μH
Note 2. Installation
• All wiring shall comply with local installation
requirements. (refer to the installation diagram)
Note 3. Maintenance and Repair
• The instrument modifi cation or parts replacement by
other than authorized representative of Yokogawa
Electric Corporation is prohibited and will void Type of
Protection “n”.
Power Supply
(Zone 2 only)
Transmitter
Supply
Non-hazardous Location
[Installation Diagram]
Hazardous Location
+
–
+
–
F0210.ai
Ratings of the Power Supply as follows; Maximum Voltage: 30 V
● CENELEC ATEX Type of Protection “Dust”
• Applicable Standard: EN50281-1-1:1997
• Type of Protection and Marking Code: II 1D
• Maximum Surface Temperature:
T65°C (Tamb.: 40°C), T85°C (Tamb.: 60°C), and
T105°C (Tamb.: 80°C)
Note 1. Installation instructions
The cable entry devices and blanking elements
shall be of a certifi cated type providing a level of
ingress protection of at least IP6x, suitable for
the conditions of use and correctly installed.
(2) Electrical Connection
The type of electrical connection is stamped near the
electrical connection port according to the following
marking.
F0211.ai
Location of the marking
Screw Size Marking
ISO M20 × 1.5 female M
AANSI 1/2 NPT female
(3) Installation
WARNING
• All wiring shall comply with local installation
requirement and local electrical code.
• There is no need of the conduit seal for both of
Division 1 and Division 2 hazardous locations
because this product is sealed at factory.
• In case of ANSI 1/2 NPT plug, ANSI hexagonal
wrench should be applied to screw in.
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