<2. Notes on Handling>
2-13
IM 01C50B01-01E
Note 5. 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.
Note 6. Special Conditions for Safe Use
WARNING
• Because the enclosure of the Temperature
Transmitter is made of aluminium, if it is
mounted in zone 0, 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.
• If the equipment is affected by external
sources of heating or cooling from plant
facilities, make sure that the parts in contact
with the equipment or in the near vicinity of
the equipment do not exceed the ambient
temperature range of the equipment.
Transmitter
Supply
Safety Barrier *1
Hazardous Location
Nonhazardous Location
+
–
+
–
[Installation Diagram]
F0212.ai
Sensor
1
2
3
4
5
*1:
In any safety barriers used the output current must be
limited by a resistor “R” such that Imaxout-Uz/R.
b) IECEx Intrinsic safety “ic”
Caution for IECEx Intrinsic safety “ic”.
Note 1. Model YTA110/SU2, YTA310/SU2, and
YTA320/SU2 temperature transmitters are
applicable for use in hazardous locations:
• No. Certificate: IECEx KEM 09.0032X
• Applicable standard: IEC60079-11:2011,
IEC60079-0:2011, IEC60079-26:2006
• Type of Protection and Marking Code:
Ex ic IIC T4...T5 Gc
• Ambient Temperature:
-40 to 70°C for T4, -40 to 50°C for T5
• Enclosure: IP66/IP67 in accordance with
IEC60529
Note 2. Electrical Data
• [Supply circuit (Terminals: + and –)]
Ui = 30 V, Ci = 20 nF, Li = 730 μH
• [Sensor circuit (Terminals: 1 to 5)]
Uo = 9 V, Io = 40 mA, Po = 90 mW, Co = 0.7 μF,
Lo = 10 mH
• The above parameters apply when one of the
two conditions below is given:
- the total Li of the external circuit (excluding
the cable) is < 1 % of the Lo value or
- the total Ci of the external circuit (excluding
the cable) is < 1 % of the Co value.
• The above parameters are reduced to 50%
when both of the two conditions below are
given:
- the total Li of the external circuit (excluding
the cable) is ≥ 1 % of the Lo value and
- the total Ci of the external circuit excluding
the cable) is ≥ 1 % of the Co value.
• The reduced capacitance of the external circuit
(including cable) shall not be greater than 1µF
for Group IIB and 600nF for Group IIC.
Note 3. Installation
• All wiring shall comply with local installation
requirements. (Refer to the installation diagram)
Note 4. Operation
• Keep strictly the “WARNING” on the label on
the transmitter.
WARNING: POTENTIAL ELECTROSTATIC
CHARGING HAZARD
-SEE USER’S MANUAL
Note 5. 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.
Note 6. Special Conditions for Safe Use
WARNING
• 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.
• If the equipment is affected by external
sources of heating or cooling from plant
facilities, make sure that the parts in contact
with the equipment or in the near vicinity of
the equipment do not exceed the ambient
temperature range of the equipment.
