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 Tamb 70 °C)
NG IECEx Type n Component
Certificate Number: IECEx BAS 07.0054U
Ex nA nL IIC T5 (-40 °C Tamb 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
Ui = 30 Vdc Ui = 17.5 Vdc Uo = 13.9 Vdc
Ii = 300 mA Ii = 380 mA Io = 23 mA
Pi = 1.3 W Pi = 5.32 W Po = 79 mW
Ci = 2.1 nF Ci = 2.1 nF Ci = 7.7 nF
Li = 0 mH Li = 0 mH Li = 0 mH
Table B-4. Electrical Data
Transmitter Sensor
RTD Thermocouple
Ui = 32 V Ui = 5 V Ui = 0