Warning – Yokogawa EJX930A User Manual

Page 18

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<2. Handling Cautions>

2-7

IM 01C25R03-01E

WARNING

• In the case where the enclosure of the

Pressure Transmitter is made of aluminium,

if it is mounted in an area where the use of

category 1G apparatus 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.

• 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.

• 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

category 2D apparatus is required, it shall

be installed in such a way that the risk from

electrostatic discharges and propagating

brush discharges caused by rapid flow of

dust is avoided.

• To satisfy IP66 or IP67, apply waterproof

glands to the electrical connection port.

• When the lightning protector option is

specified, the apparatus is not capable

of withstanding the 500V insulation test

required by EN60079-11.

This must be taken into account when

installing the apparatus.

Note 6. Installation instructions

Non-Hazardous Location

Hazardous Location

F0308.ai

Terminator

Safety Barrier

Transmitter

Pressure

Transmitter

Transmitter

+

+

+

Terminator

+

+

[Installation Diagram]

SUPPLY

RTD

Pt100.3wire

• In the rating 1(*1), the output current of the

barrier must be limited by a resistor ‘Ra’ such

that Io = Uo/Ra.

• In the rating 2(*2), the output of the barrier

must be the characteristics of the trapezoid

or the rectangle and this transmitter can be

connected to Fieldbus equipment which are

in according to the FISCO model.

• The terminators may be built in by a barrier.

• More than one transmitter may be connected

to the power supply line.

• The terminator and the safety barrier shall be

certified.

Electrical data:
Supply circuit

Maximum Input Voltage Ui: 24 V

*1:
Rating 1

Maximum Input Current Ii: 250 mA

Maximum Input Power Pi: 1.2 W

Maximum Internal Capacitance Ci: 3.52 nF

Maximum Internal Inductance Li: 0 μH

or

Maximum Input Voltage Ui: 17.5 V

*2:
Rating 2

Maximum Input Current Ii: 380 mA

Maximum Input Power Pi: 5.32 W

Maximum Internal Capacitance Ci: 3.52 nF

Maximum Internal Inductance Li: 0 μH

or

Maximum Input Voltage Ui: 17.5 V

Maximum Input Current Ii: 460 mA

Maximum Input Power Pi: 5.32 W

Maximum Internal Capacitance Ci: 3.52 nF

Maximum Internal Inductance Li: 0 μH

Sensor circuit

Maximum Output Voltage Uo: 7.63 V

Maximum Output Current Io: 3.85 mA

Maximum Output Power Po: 0.008 W

Maximum Internal Capacitance Co: 4.8 μF

Maximum Internal Inductance Lo: 100 mH

• RTD sensor is prepared by the user.

The sensor signal line must suited a test

voltage of 500Vac.

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