Smart Positioner
YT-2500 / 2550 / 2501 Series
Product Manual
Ver. 1.34
6
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In case of Fail Freeze product, it keeps the position of current valve in case of input current signal
failure. However, please do not leave it in that state for a long time and take immediate action to
restore the system. There is no fault in the positioner, but it is often reported that the valve is out
of position due to an unexpected leak in the pipe or actuator.
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For detailed warranty information, please contact the corresponding local Rotork YTC Limited
office or main office in South Korea.
1.3
Explosion Proof Warning (Only for Intrinsic safety type positioners)
Please ensure the unit is being used and installed in conformity with local, regional, and national
explosion proof within the proper safety barrier environment.
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Refer to “2.6 Certifications”
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Explosion proof type of cables and gaskets should be used, when explosion gases are present at
the installation site.
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Positioner has 2 ports for power connection. Explosion proof type wires and packing should be
used. Blind plug is required when any port is not being used.
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Ring terminal with surface area of more than 1.25mm
2
with M4 spring washer should be used to
connect the power.
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For external ground terminal, ring terminal with surface area of more than 5.5mm
2
should be used.
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Some of the enclosure parts are made of non-metallic materials. To prevent the risk of Electrostatic
sparking, clean the enclosure only with a damp cloth.
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The product must be installed in such a manner as to minimize the risk of impact or friction with
other metal surfaces.
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For Intrinsically Safe installations, the product must be connected to suitably rated intrinsically safe
equipment, and must be installed in accordance with applicable intrinsically safe installation
standards.
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Special conditions for safe use :
Impact testing on light transmitting parts was carried out with low impact energe. Applications with
a high risk of impact or with risk of high impact energies are to be avoided.
The ambient temperature range deviates from the standard temperature range and amounts:
Temperature class T5 / T100°C: -40°C to +60°C
Temperature class T6 / T85°C: -40°C to +40°C
