<2. Handling Cautions>
2-13
IM 01C25B01-01E
2.9.4 IECEx Certification
EJX Series pressure transmitters with optional
code /SU21 can be selected the type of
protection (IECEx Intrinsically Safe Ex ia, Ex ic
or flameproof) 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. 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.
a. IECEx Intrinsically Safe Ex ia
Caution for IECEx Intrinsically safe Ex ia.
Note 1. EJX/EJA-E series pressure transmitters
with optional code /SU21 are applicable for
use in hazardous locations
• No. IECEx DEK 11.0081X
• Applicable Standard:
IEC 60079-0:2011, IEC 60079-11:2011
• Ex ia IIC T4 Ga
• Ambient Temperature: –50 to 60°C
• Max. Process Temp.: 120°C
• Enclosure: IP66/IP67
To satisfy IP66 or IP67, apply waterproof
glands to the electrical connection port.
Note 2. Electrical Data
Maximum Input Voltage (Ui) = 30 V
Maximum Input Current (Ii) = 200 mA
Maximum Input Power (Pi) = 0.9 W
(linear source)
Maximum Internal Capacitance (Ci) = 27.6 nF
Maximum Internal Inductance (Li) = 0 μH
When the lightning protector option is specified,
the apparatus is not capable of withstanding the
500V insulation test required by IEC60079-11.
This must be taken into account when installing
the apparatus.
Note 3. Installation
• In any safety barrier used output current
must be limited by a resistor ‘R’ such that
Io=Uz/R.
• The safety barrier must be IECEx certified.
• Input voltage of the safety barrier must be
less than 250 Vrms/Vdc.
• The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric
Corporation is prohibited and will void IECEx
certification.
F0216.ai
EJX/EJA-E Series
Pressure Transmitters
IECEx certified
Safety Barrier
Supply
Hazardous Location
Nonhazardous Location
+
–
+
–
[Ex ia]
Group IIC, Zone 0
(*1)
*1: When using non isolation barrier,
connect (*1) to IS barrier system.
Note 4. Specific Condition of Use
WARNING
• 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.
• When the enclosure of the pressure
transmitter is made of aluminum, if it is
mounted in an area where the use of
EPL Ga equipment is required, it must be
installed such, that, even in the event of rare
incidents, ignition sources due to impact and
friction sparks are excluded.
• Electrostatic charges on the coated parts of
Pressure Transmitter shall be avoided.
b. IECEx Intrinsically Safe Ex ic
Caution for IECEx Intrinsically safe Ex ic.
Note 1. EJX/EJA-E series pressure transmitters
with optional code /SU21 are applicable for
use in hazardous locations
• No. IECEx DEK 13.0061X
• Applicable Standard: IEC 60079-0:2011,
IEC 60079-11:2011
