Yokogawa YTA320 - Manual (Page 13)

<2. Notes on Handling>
2-7
IM 01C50B01-01E
• Ambient Temperature for Dust Atmospheres:
–40 to 65°C (T70°C), –40 to 80°C (T90°C)
• Enclosure: 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.
• The cable entry devices shall be of a certified
flameproof type, suitable for the conditions of
use.
Note 4. Operation
• Keep strictly the “WARNING” on the label on
the transmitter.
WARNING: AFTER DE-ENERGIZING, DELAY
5 MINUTES BEFORE OPENING.
WHEN THE AMBIENT TEMP. ≥
70°C, USE THE HEATRESISTING
CABLES OF HIGHER THAN
90°C.
• 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.
c) ATEX Intrinsically Safe “ic”
WARNING
When using a power supply not having a non-
incendive circuit, please pay attention not to
ignite in the surrounding flammable atmosphere.
In such a case, we recommend using wiring
metal conduit in order to prevent the ignition.
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 60079-0:2009,
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
• IP Code: IP67
• 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
• 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)
• Cable glands, adapters and/or blanking
elements shall be of Ex “n”, Ex “e” or Ex “d” and
shall be installed so as to maintain the specified
degree of protection (IP code) of the equipment.
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 ATEX
Intrinsically Safe “ic“.
Note 6. Specific Conditions of Use
• Precautions shall be taken to minimize the risk
from electrostatic discharge of painted parts.
• The dielectric strength of at least 500 V a.c.
r.m.s between the intrinsically safe circuits
and the enclosure of the Model YTA series
temperature transmitter is limited only by the
overvoltage protection.