YOKOGAWA EJX Series User Manual page 13

WARNING
• In the case where the enclosure of the Pressure
Transmitter is made of aluminium, if it is mounted
in an area where the use of category 1 G
apparatus 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 charge may cause an exlosion
hazard. Avoid any actions that cause the
gerenation of eletrostatic charge, such as rubbing
with a dry cloth on coating face of the product.
• In case of the enclosure of the Pressure
Transmitter with paint layers, if it is mounted in an
area where the use of category 2D apparatus is
required, it shall be installed in such a way that the
risk from electrostatic discharges and propagating
brush discharges caused by rapid flow of dust is
avoided.
• To satisfy IP66 or IP67, apply waterproof glands to
the electrical connection port.
• When the lightning protector option is specified,
the apparatus is not capable of withstanding the
500V insulation test required by EN60079-11. This
must be taken into account when installing the
apparatus.
b. ATEX Intrinsically Safe Type for EJX910A
and EJX930A
Caution for ATEX Intrinsically safe type.
Note 1. Model EJX Series pressure transmitters with
optional code /KS2 for potentially explosive
atmospheres:
• No. KEMA 06ATEX 0037X
• Applicable Standard:
EN 50014:1997, EN 50020:2002,
EN 50284:1999, EN 50281-1-1:1998
• Type of Protection and Marking code:
EEx ia IIC T4
• Group: II
• Category: 1G, 1D
• Ambient Temperature for gas-proof:
–50* to 60°C
* –15°C when /HE is specified.
• Process Temperature (Tp.): 120°C max.
• Maximum Surface Temperature for dust-proof:
T85°C (Tamb.: –40* to 60°C, Tp.: 80°C)
T100°C (Tamb.: –40* to 60°C, Tp.: 100°C)
T120°C (Tamb.: –40* to 60°C, Tp.: 120°C)
* –15°C when /HE is specified.
• Enclosure: IP66 and IP67
<2. Handling Cautions>
Note 2. Electrical Data
[Supply/Output circuit (terminals + and -)]
In type of explosion protection intrinsic safety EEx
ia IIC, only for connection to a certified intrinsically
safe circuit with following maximum values:
Ui = 30 V
Ii = 200 mA
Pi = 0.9 W
Effective internal capacitance; Ci = 10 nF
Effective internal inductance; Li = 0 mH
[Pulse Output circuit (terminals - and pulse)]
In type of explosion protection intrinsic safety EEx
ia IIC, only for connection to a certified intrinsically
safe circuit with following maximum values:
Ui = 30 V
Ii = 200 mA
Pi = 0.9 W
Ci = 10 nF
Li = 0 mH
[External temperature input circuit (connector)]
In type of explosion protection intrinsic safety EEx
ia IIC, with following maximum values:
Uo = 30 V
Io = 95.4 mA
Po= 468 mW
Co = 11 nF
Lo= 3.9 mH
Note 3. Installation
• All wiring shall comply with local installation
requirements. (Refer to the installation diagram)
• When the analog and pulse circuits are connected
to separate barriers, it shall be assured that the
voltage difference between these output circuits is
not more than 30 V.
• When used in a potentially explosive atmosphere,
Requiring the use of apparatus of equipment
category 1D or 2D, certified cable entry devices
shall be used that are suitable for the application
and correctly installed.
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 Intrinsically safe Certification.
Note 5. Special Conditions for Safe Use
• In the case where the enclosure of the Pressure
Transmitter is made of aluminium, if it is mounted
in an area where the use of category 1 G
apparatus 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.
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IM 01C25A01-01E