<2. Notes on Handling>
2-7
IM 01C50B01-01E
b) ATEX Flameproof Type and Dust Ignition
Proof Type
Caution for ATEX Flameproof Type and Dust
Ignition Proof Type
Note 1. Model YTA110/KU2, YTA310/KU2 and
YTA320/KU2 temperature transmitters are
applicable for use in hazardous locations:
• No. KEMA 07ATEX0130
• Applicable Standard: EN 60079-0:2012,
EN 60079-1:2007, EN 60079-31:2009
• Type of Protection and Marking Code: II 2 G Ex
d IIC T6/T5 Gb, II 2 D Ex tb IIIC T70°C, T90°C
Db
• Ambient Temperature for Gas Atmospheres:
–40 to 75°C (T6), –40 to 80°C (T5)
• Ambient Temperature for Dust Atmospheres:
–30 to 65°C (T70°C), –30 to 80°C (T90°C)
• Enclosure: IP66/IP67
Note 2. Electrical Data
• Supply voltage: 42 V dc max.
• Output signal: 4 to 20 mA
Note 3. Installation
• All wiring shall comply with local installation
requirement.
• Cable glands, adapters and/or blanking
elements with a suitable IP rating shall be of
Ex d IIC/Ex tb IIIC certified by ATEX and
shall be installed so as to maintain the
specific degree of protection (IP Code) of the
equipment.
Note 4. Operation
• Keep strictly the “WARNING” on the label on
the transmitter.
WARNING: AFTER DE-ENERGING, DELAY 5
MINUTES BEFORE OPENING.
WHEN THE AMBIENT
TEMP.≥70°C, USE THE
HEATRESISTING CABLES AND
CABLE GLANDS OF HIGHER
THAN 90°C.
POTENTIAL ELECTROSTATIC
CHARGING HAZARD
-SEE USER’S MANUAL
• Take care not to generate mechanical spark
when access to the instrument and peripheral
devices in hazardous location.
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 ATEX
Flameproof 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 YTA is mounted in an area where the
use of EPL Db equipment 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.
• 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.
c) ATEX Intrinsically Safe “ic”
Caution for ATEX Intrinsically Safe “ic”
Note 1. Model YTA110/KU2, YTA310/KU2 and
YTA320/KU2 temperature transmitters for
potentially explosive atmospheres:
• Applicable standard: EN 60079-0:2012,
EN 60079-11:2012
• Type of Protection and Marking:
II 3 G Ex ic IIC T5…T4 Gc
• Ambient Temperature: –30 to 50°C for T5,
–30 to 70°C for T4
• Enclosure: IP66/IP67 in accordance with
EN 60529
• Overvoltage Category: I
Note 2. Electrical Data
• [Supply circuit]
Ui = 30 V
Effective internal capacitance, Ci = 28 nF
Effective internal inductance, Li = 730 μH
• [Sensor circuit]
Uo= 9 V Io = 40 mA Po = 90 mW
Max. allowed external capacitance, Co = 0.7 μF
Max. allowed external inductance, Lo = 10 mH
