Yokogawa EJA115 User Manual
Page 15
IM 01C22K01-01E
2-7
2. HANDLING CAUTIONS
• 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 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.
• The cable entry devices and blanking elements for
type n shall be of a certified 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.
T0202.EPS
F0213.EPS
Location of the marking
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, IGNI-
TION SOURCES DUE TO IMPACT AND
FRICTION SPARKS ARE EXCLUDED.
F0214.EPS
EJA Series Pressure
Transmitters
IECEx certified
Safety Barrier
Supply
Hazardous Location
Nonhazardous Location
General
Purpose
Equipment
+
–
+
–
+
–
+
–
[Intrinsically Safe]
Group I/IIC, Zone 0
F0215.EPS
EJA Series Pressure
Transmitters
Supply
Hazardous Location
Nonhazardous Location
+
–
+
–
Not Use
Safety Barrier
[type n]
IECEx Certified
Equipment [nL]
Group IIC, Zone 2
b. IECEx Flameproof Type
Caution for IECEx flameproof 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: IEC 60079-0:2004,
IEC 60079-1:2003
• 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 certified flameproof type, suitable for the
conditions of use and correctly installed.
• Unused apertures shall be closed with suitable
flameproof certified blanking elements. (The plug
attached is certificated as the flame 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.
Note 3. Operation
• WARNING:
AFTER DE-ENERGIZING, DELAY 10 MINUTES
BEFORE OPENING.