<2. Handling Cautions>
27
IM 01C25A01-01E
e. IECEx Flameproof Type
Caution for IECEx flameproof type.
Note 1. EJX/EJA-E Series pressure transmitters with
optional code /SF2 or /SU21 are applicable for
use in hazardous locations:
• No. IECEx CSA 07.0008
• Applicable Standard: IEC60079-0:2011,
IEC60079-1:2007-4
• Flameproof for Zone 1, Ex d IIC T6...T4 Gb
• 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.
32 V dc max. (F
OUNDATION
Fieldbus and
PROFIBUS PA type)
9 to 28 V dc, 27 mW (Low Power type)
9 to 30 V dc, 250 mW (RS485 Modbus
Communication Type)
• Output Signal: 4 to 20 mA dc
15 mA (F
OUNDATION
Fieldbus and PROFIBUS PA
type)
1 to 5 V (Low Power type)
RS485 Modbus (RS485 Modbus Communication
Type)
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.
• Wiring connection for output signal code Q (Low
Power type) shall follow the diagram below.
F0221.ai
Three-Wire Connection
Pressure Transmitters
Power Supply
Voltmeter
SUPPLY –
A
+
–
+
–
Four-Wire Connection
Pressure Transmitters
Power Supply
Voltmeter
SUPPLY –
A
+
–
+
–
Note 3. Operation
• WARNING:
AFTER DE-ENERGIZING, DELAY 5 MINUTES
BEFORE OPENING.
• WARNING:
WHEN THE AMBIENT TEMP.≥65°C, USE HEAT-
RESISTING CABLE AND CABLE GLAND ≥90°C.
• Take care not to generate mechanical sparking
when accessing to the instrument and peripheral
devices in a hazardous location.
• Electrostatic charge may cause an explosion
hazard. Avoid any actions that cause the
generation of electrostatic charge, such as rubbing
with a dry cloth on coating face of the product.
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.
• Electrical Connection
A mark indicating the electrical connection type is
stamped near the electrical connection port. These
marks are as followed.
F0222.ai
Location of the mark
Screw Size
Marking
ISO M20 × 1.5 female
ANSI 1/2 NPT female
M
N or
W
2.5 EMC Conformity Standards
EN 61326-1 Class A, Table 2 (for use in industrial
locations)
EN 61326-2-3
EN 61326-2-5 (for Fieldbus)
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.
