7.7.4 NG IECEx Type n – without enclosure
Certificate:
[Headmount Fieldbus/PROFIBUS, Railmount HART]: IECEx
BAS 13.0053X
[Headmount HART]: IECEx BAS 12.0070U
Standards:
IEC 60079-0: 2017, IEC 60079-15: 2010
Markings:
[Headmount Fieldbus/PROFIBUS, Railmount HART]: Ex nA IIC
T5 Gc (–40 °C ≤ T
a
≤ +70 °C)
[Headmount HART]: Ex nA IIC T6…T5 Gc; T6(–60 °C ≤ T
a
≤ +40
°C); T5(–60 °C ≤ T
a
≤ +85 °C)
Special Conditions for Safe Use (X):
1. The Rosemount 644 Temperature Transmitter must be installed in a
suitably certified enclosure such that it is afforded a degree of
protection of at least IP54 in accordance with IEC 60529 and IEC
60079-15.
2. When fitted with the Transient Protector Assembly, the equipment is
not capable of withstanding the 500 V test. This must be taken into
account during installation.
7.7.5 NK IECEx Dust
Certificate:
IECEx FMG 12.0022X
Standards:
IEC 60079-0: 2011, IEC 60079-31: 2013
Markings:
Ex tb IIIC T130 °C Db, (–40 °C ≤ T
a
≤ +70 °C); IP66
See Table 7-1 for process temperatures
Special Conditions for Safe Use (X):
1. See certificate for ambient temperature range.
2. The non-metallic label may store an electrostatic charge and become
a source of ignition in Group III environments.
3. Guard the LCD display cover against impact energies greater than 4
joules.
4. Flameproof joints are not intended for repair.
5. A suitable certified Ex d or Ex tb enclosure is required to be connected
to temperature probes with Enclosure option “N”.
6. Care shall be taken by the end user to ensure that the external
surface temperature on the equipment and the neck of DIN Style
Sensor probe does not exceed 130 °C.
Quick Start Guide April 2019
34 Rosemount 644H and 644R
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