IM 01C25F01-01E
2-10
2. HANDLING CAUTIONS
2.9.4 IECEx Certification
Model EJX Series pressure transmitters with
optional code /SU2 can be selected the type of
protection (IECEx Intrinsically Safe/type n 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. 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.
a. IECEx Intrinsically Safe Type / type n
Caution for IECEx Intrinsically safe and type n.
Note 1. Model EJX Series differential, gauge, and
absolute pressure transmitters with
optional code /SU2 are applicable for use
in hazardous locations
• No. IECEx CSA 05.0005
• Applicable Standard: IEC 60079-0:2000,
IEC 60079-11:1999, IEC 60079-15:2001
• Ex ia IIC T4, Ex nL IIC T4
• Ambient Temperature :–50 to 60
°
C
• Max. Process Temp.: 120
°
C
• Enclosure: IP66 and IP67
Note 2. Entity Parameters
• Intrinsically safe ratings are as follows:
Maximum Input Voltage (Vmax/Ui) = 30 V
Maximum Input Current (Imax/Ii) = 200 mA
Maximum Input Power (Pmax/Pi) = 0.9 W
Maximum Internal Capacitance (Ci) = 10 nF
Maximum Internal Inductance (Li) = 0
µ
H
• Type "n" ratings are as follows:
Maximum Input Voltage (Vmax/Ui) = 30 V
Maximum Internal Capacitance (Ci) = 10 nF
Maximum Internal Inductance (Li) = 0
µ
H
• Installation Requirements
Uo
≤
Ui, Io
≤
Ii, Po
≤
Pi,
Co
≥
Ci + Ccable, Lo
≥
Li + Lcable
Voc
≤
Vmax, Isc
≤
Imax,
Ca
≥
Ci + Ccable, La
≥
Li + Lcable
Uo, Io, Po, Co, Lo, Voc, Isc, Ca and La are
parameters of barrier.
Note 3. Installation
• In any safety barreir used output current must be
limited by a resistor 'R' such that Io=Uo/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 and will void
IECEx Intrinsically safe and type n certification.
F0213-1.EPS
EJX Series Pressure
Transmitters
IECEx certified
Safety Barrier
Supply
Hazardous Location
Nonhazardous Location
General
Purpose
Equipment
+
–
+
–
+
–
+
–
[Intrinsically Safe]
Group IIC, Zone 0
F0213-2.EPS
EJX Series Pressure
Transmitters
Supply
Hazardous Location
Nonhazardous Location
+
–
+
–
Not Use
Safety Barrier
[type n]
IECEx Certified
Equipment [nL]
EJX Series Pressure
Transmitters
Group IIC, Zone 2
b. IECEx Flameproof Type
Caution for IECEx flameproof type.
Note 1. Model EJX Series differential, gauge, and
absolute pressure transmitters with
optional code /SF2 and /SU2 are appli-
cable for use in hazardous locations:
• No. IECEx CSA 05.0002
• Applicable Standard: IEC60079-0:2000,
IEC60079-1:2001
• Flameproof for Zone 1, Ex d IIC T6...T4
• Enclosure: IP66 and IP67
• Maximum Process Temperature: 120
°
C (T4),
100
°
C (T5), 85
°
C (T6)
• Ambient Temperature: –50 to 75
°
C (T4), –50 to
80
°
C (T5), –50 to 70
°
C (T6)
• Supply Voltage: 42 V dc max.
• Output Signal: 4 to 20 mA dc
Note 2. Wiring
• In hazardous locations, the cable entry devices shall
be of a certified flameproof type, suitable for the
conditions of use and correctly installed.
