<2. Handling Cautions>
2-12
IM 01C25C01-01E
c. ATEX Intrinsically Safe Type/ATEX
Flameproof Type
EJX/EJA-E Series pressure transmitters with
optional code /KU22 or /V1U1 can be selected
the type of protection ATEX Flameproof,
Intrinsically Safe. Ex ia, or Ex ic for use in
hazardous area.
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. For combined approval types Once a
device of multiple approval type is installed,
it should not be re-installed using any
other approval types. Apply a permanent
mark in the check box of the selected
approval type on the certification label on
the transmitter to distinguish it from unused
approval types.
● ATEX Intrinsically Safe Ex ic
Caution for ATEX intrinsically safe Ex ic
• Applicable standards:
EN IEC 60079-0, EN 60079-11
• Specific Ex Marking:
II 3 G
Ex ic IIC T4 Gc
• Ambient temperature:
–30°C ≤ Ta ≤ +60°C
–15°C ≤ Ta ≤ +60°C *
• Process temperature:
–30°C ≤ Tp ≤ +120°C
–15°C ≤ Tp ≤ +120°C *
* When FKM O-rings are used. ( /HE is specified.)
• Enclosure: IP66
• Pollution degree: 2
• Overvoltage category: I
• Power supply: ≤ 30 V, ≤ 21.6 mA
• Dielectric strength (Note 3)
500 V AC, r.m.s.,
1 min
Terminals:
Supply –
to Enclosure
• Specific condition of use:
Precaution shall be taken to minimize the
risk from electrostatic discharges on the
non-metallic parts (excluding glass parts) or
coated parts of the equipment.
The dielectric strength of at least 500 V of
the intrinsically safe circuits of the equipment
is limited only by the overvoltage protection.
From the safety point of view, the intrinsically
safe circuit of the equipment shall be
assumed to be connected to earth.
• Installation and erection:
Cable entry devices suitable for the thread
form and the size of the cable entries must
be used, according to the following marking
on the equipment.
F0218.ai
Screw Size
Marking
ISO M20 × 1.5 female
ANSI 1/2 NPT female
M
A or
W
N or
When installing the equipment, the selected
Type of Protection should be ticked as
follows.
Ex ic IIC T4 Gc
Ex ia IIC T4 Ga
• Use and setting-up (operation):
If the pressure transmitter is mounted in an
area where explosive atmospheres may be
present, it must be installed in such a way
that the risk from electrostatic discharges.
• Maintenance and repair:
WARNING
A modification of the equipment would no longer
comply with the construction described in the
certificate documentation.
Only personnel authorized by Yokogawa Electric
Corporation can repair the equipment.
Yokogawa Electric Corporation
Model
EJX Series
Title
Control drawing
Prepared by
M. Inatomi
Approved by
D. Harada
No.
IKE046-A70
Page
1
Revision
2
Date
2020-09-02
Revised pages
1−2
SUPPLY−
Transmitter
Hazardous Area Non−Hazardous Area
Associated
Apparatus
Ui= 30 V
Ci= 27.6 nF
Li= 0 μH
