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Reference Manual
00809-0100-4728, Rev AA
June 2011
B-5
Rosemount 644
N7 IECEx Type n
Certificate Number: IECEx BAS 07.0055
Ex nA nL IIC T5 (-40 °C T
amb
70 °C)
NG IECEx Type n Component
Certificate Number: IECEx BAS 07.0054U
Ex nA nL IIC T5 (-40 °C T
amb
75 °C)
Schedule of Limitations:
The component must be housed in a suitably certified enclosure that
provides a degree of protection of at least IP54.
Table B-3. Entity Parameters
Transmitter (I.S.) Transmitter (FISCO) Sensor
U
i
= 30 Vdc U
i
= 17.5 Vdc U
o
= 13.9 Vdc
I
i
= 300 mA I
i
= 380 mA I
o
= 23 mA
P
i
= 1.3 W P
i
= 5.32 W P
o
= 79 mW
C
i
= 2.1 nF C
i
= 2.1 nF C
i
= 7.7 nF
L
i
= 0 mH L
i
= 0 mH L
i
= 0 mH
Table B-4. Electrical Data
Transmitter Sensor
RTD Thermocouple
U
i
= 32 V U
i
= 5 V U
i
= 0