Yokogawa EJX930A - Manual (Page 24)

<3. Handling Cautions>
3-7
IM 01C25R01-01E
• Ambient Temperature for gas-proof:
–50 to 60°C
• Process Temperature (Tp.): 120°C max.
• Maximum Surface Temperature for dust-
proof:
T85°C (Tamb.: –40* to 60°C, Tp.: 80°C)
T100°C (Tamb.: –40* to 60°C, Tp.: 100°C)
T120°C (Tamb.: –40* to 60°C, Tp.: 120°C)
* –15°C when /HE is specified.
• Enclosure: IP66 and IP67
Note 2. Electrical Data
[Supply/Output circuit (terminals + and -)]
In type of explosion protection intrinsic safety
EEx ia IIC, only for connection to a certified
intrinsically safe circuit with following maximum
values:
Ui = 30 V
Ii = 200 mA
Pi = 0.9 W
Ci = 10 nF
Li = 0 mH
[Pulse Output circuit (terminals - and pulse)]
In type of explosion protection intrinsic safety
EEx ia IIC, only for connection to a certified
intrinsically safe circuit with following maximum
values:
Ui = 30 V
Ii = 200 mA
Pi = 0.9 W
Ci = 10 nF
Li = 0 mH
[External temperature input circuit (connector)]
In type of explosion protection intrinsic safety
EEx ia IIC, with following maximum values:
Uo = 30 V
Io = 95.4 mA
Po= 468 mW
Co = 11 nF
Lo= 3.9 mH
Note 3. Installation
• All wiring shall comply with local installation
requirements. (Refer to the installation
diagram)
• When the analog and pulse circuits are
connected to separate barriers, it shall be
assured that the voltage difference between
these output circuits is not more than 30 V.
• When used in a potentially explosive
atmosphere, Requiring the use of apparatus
of equipment category 1D or 2D, certified
cable entry devices shall be used that are
suitable for the application and correctly
installed.
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 KEMA
Intrinsically safe Certification.
Note 5. Special Conditions for Safe Use
• 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 1 G 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.
Transmitter
Supply
Safety Barrier
Nonhazardous Location
[Installation Diagram]
Hazardous Location
+
–
+
–
F0305.ai
(*1)
Note 1
Sensor out
RTD sensor
Note 2
 Without pulse output
 With pulse output
Transmitter
Supply
Safety Barrier
Nonhazardous Location Hazardous Location
+
–
+
–
+
(*1)
Note 1
Sensor out
RTD sensor
Note 2
Safety Barrier +
–
(*1)
Note 1
Pulse
Note 1:
• In any safety barriers used the output current must be
limited by a resistor “R” such that Io=Uz/R.
• The safety barrier shall be certified by notify body EU
as ATEX.
• When using non isolation barrier, connect (*1) to IS
earthing system.
Note 2:
• RTD sensor is prepared by the user.
• The sensor signal line must withstand a test voltage of
500 V AC.