IM 01C25T02-01E
2-6
2. HANDLING CAUTIONS
I.S. values Power supply-field device:
Po Pi, Uo Ui, Io Ii
Calculation of max. allowed cable length:
Ccable Co - ∑Ci - ∑Ci (Terminator)
Lcable Lo - ∑Li
Number of Devices
The number of devices (max. 32) possible on a
fieldbus link depends on factors such as the power
consumption of each device, the type of cable used,
use of repeaters, etc.
b. CENELEC ATEX (KEMA) Flameproof Type
Caution for CENELEC ATEX (KEMA) flameproof
type
Note 1. EJX Series differential, gauge, and absolute
pressure transmitters with optional code /KF2
for potentially explosive atmospheres:
• No. KEMA 03ATEX2570
• Applicable Standard: EN 50014, EN 50018,
EN 50281-1-1
• Type of Protection and Marking Code: EEx
d IIC T6...T4
• Group: II
• Category: 2G, 1D
• Temperature Class: T6, T5, and T4
• Enclosure: IP66 and IP67
• Ambient Temperature for gas-proof:
–50 to 70°C (T6), –50 to 80°C (T5), and
–50 to 75°C (T4)
• Maximum Process Temperature (Tp.) for
gas-proof:
85°C (T6), 100°C (T5), and 120°C (T4)
• Maximum Surface Temperature for dust-
proof:
T80°C (Tamb.: –40 to 40°C, Tp.: 80°C)
T100°C (Tamb.: –40 to 60°C, Tp.: 100°C)
T120°C (Tamb.: –40 to 80°C, Tp.: 120°C)
Note 2. Electrical Data
• Supply voltage: 32 V dc max.
Output current: 15 mA dc
Note 3. Installation
• All wiring shall comply with local installa-
tion requirements.
•The cable entry devices shall be of a
certified flameproof type, suitable for the
conditions of use.
Note 4. Operation
• Keep the “WARNING” label attached to the
transmitter.
WARNING: AFTER DE-ENERGIZING,
DELAY 5 MINUTES BEFORE
OPENING. WHEN THE AMBIENT
TEMP.65°C, USE HEAT-RESISTING
CABLES90°C.
• Take care not to generate mechanical
sparking when accessing the instrument and
peripheral devices in hazardous location.
Note 5. Maintenance and Repair
• The instrument modification or part replace-
ment by other than an authorized representa-
tive of Yokogawa Electric Corporation is
prohibited and will void KEMA Flameproof
Certification.
c. CENELEC ATEX Type of Protection “n”
Caution for CENELEC ATEX Type of Protection “n”
type
Note 1. EJX Series differential, gauge, and absolute
pressure transmitters with option code /KN25
for potentially explosive atmospheres:
• Applicable standard: EN 50021, EN 60529
• Type of Protection and Marking Code:
EEx nL IIC T4
• Group: II
• Category: 3G
• Ambient Temperature: –50 to 60°C
• Ambient humidity: 0 to 100%RH
(No condensation)
• Maximum Process Temperature : 120°C
• Enclosure: IP66 and IP67
Note 2. Electrical Data
Ui = 32 Vdc
Ci = 1.76 nF
Li = 0 µH
Note 3. Installation
• All wiring shall comply with local installa-
tion requirements. (refer to the installation
diagram)
Note 4. Maintenance and Repair
• The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric Corpo-
ration is prohibited and will void Type of
Protection “n”.
Non-Hazardous
Locations
Hazardous Locations
[Installation Diagram]
F0202-2.EPS
Ter mi nator
Field Instruments
(Passive)
Hand-
held-
Ter minal
(Zone2)
Ter mi nator
Power
Supply
[EEx nL]
U
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