Yokogawa EJX115A - Manual (Page 17)

<2. Handling Cautions>
15
IM 01C25A01-01E
• Ex ia IIC T4, Ex nL IIC T4
• Ambient Temperature: –50 to 60°C
• Max. Process Temp.: 120°C
• Enclosure: IP66/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 µH
• Type "n" ratings are as follows:
Maximum Input Voltage (Vmax/Ui) = 30 V
Maximum Internal Capacitance (Ci) = 10 nF
Maximum Internal Inductance (Li) = 0 µH
• 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 barrier 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.
F0216.ai
EJX Series Pressure
Transmitters
IECEx certified
Safety Barrier
Supply
Hazardous Location Nonhazardous Location
General
Purpose
Equipment
+
– +
– +
– +
–
[Intrinsically Safe]
Group IIC, Zone 0
F0217.ai
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/EJA-E Series pressure transmitters
with optional code /SF2 or /SU2 are applicable
for use in hazardous locations:
• No. IECEx CSA 07.0008
• Applicable Standard: IEC60079-0:2004,
IEC60079-1:2003
• Flameproof for Zone 1, Ex d IIC T6...T4
• Enclosure: IP66/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 75°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.
• Unused apertures shall be closed with suitable
flameproof certified blanking elements.
Note 3. Operation
• WARNING:
AFTER DE-ENERGIZING, DELAY 5 MINUTES
BEFORE OPENING.
• WARNING:
WHEN AMBIENT TEMPERATURE ≥ 65°C, USE
THE HEAT-RESISTING CABLES ≥ 90°C.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
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 IECEx Certification.
2.5 EMC Conformity Standards
EN61326-1 Class A, Table 2 (for use in industrial
locations)
EN61326-2-3
CAUTION
To meet EMC regulations, Yokogawa recommends
that customers run signal wiring through metal
conduits or use shielded twisted-pair cabling when
installing EJX/EJA-E Series transmitters in a plant.
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