<2. Handling Cautions>
10
IM 01C22A01-01E
• Type "n" ratings are as follows:
Maximum Input Voltage (Ui) = 30 V
Maximum Internal Capacitance (Ci) = 22.5 nF
Maximum Internal Inductance (Li) = 730 μH
• Installation Requirements
Uo ≤ Ui, Io ≤ Ii, Po ≤ Pi, Co ≥ Ci + Ccable,
Lo ≥ Li + Lcable, Uo, Io, Po, Co, and
Lo 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 certifi ed.
• Input voltage of the safety barrier must be less than
250 Vrms/Vdc.
• The instrument modifi cation or parts replacement by
other than authorized representative of Yokogawa
Electric Corporation and will void IECEx Intrinsically
safe and type n certifi cation.
• The cable entry devices and blanking elements for
type n shall be of a certifi ed type providing a level of
ingress protection of at least IP54, suitable for the
conditions of use and correctly installed.
• Electrical Connection:
The type of electrical connection is stamped near the
electrical connection port according to the following
marking.
F0207.ai
Location of the marking
Screw Size Marking
ISO M20 × 1.5 female M
AANSI 1/2 NPT female
Note 4. Operation
• WARNING:
WHEN AMBIENT TEMPERATURE ≥ 55°C,
USE THE HEAT-RESISTING CABLES ≥ 90°C.
Note 5. Special Conditions for Safe Use
• WARNING:
IN THE CASE WHERE THE ENCLOSURE OF
THE PRESSURE TRANSMITTER IS MADE OF
ALUMINUM, IF IT IS MOUNTED IN AN AREA
WHERE THE USE OF ZONE 0 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.
F0208.ai
EJA Series Pressure
Transmitters
Supply
Hazardous Location Non-hazardous Location
+
–
+
–
Not Use
Safety Barrier
[type n]
IECEx Certified
Equipment [nL]
Group IIC, Zone 2
EJA Series Pressure
Transmitters
IECEx certified
Safety Barrier
Supply
Hazardous Location Non-hazardous Location
General
Purpose
Equipment
+
–
+
–
+
–
+
–
[Intrinsically Safe]
Group I/IIC, Zone 0
b. IECEx Flameproof Type
Caution for IECEx fl ameproof type.
Note 1. Model EJA Series differential, gauge, and
absolute pressure transmitters with optional
code /SU2 are applicable for use in hazardous
locations:
• No. IECEx KEM 06.0005
• Applicable Standard: IEC60079-0:2004,
IEC60079-1:2003
• Type of Protection and Marking Code:
Ex d IIC T6...T4
• Enclosure: IP67
• Maximum Process Temperature: 120°C (T4),
100°C (T5), 85°C (T6)
• Ambient Temperature: –40 to 75°C (T4),
–40 to 80°C (T5), –40 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 certifi ed fl ameproof type, suitable for the
conditions of use and correctly installed.
• Unused apertures shall be closed with suitable
fl ameproof certifi ed blanking elements. (The plug
attached is certifi cated as the fl ame proof IP67 as a
part of this apparatus.)
• In case of ANSI 1/2 NPT plug, ANSI hexagonal
wrench should be applied to screw in.
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