Emerson Rosemount 5400 Series - Page 192

180
Reference Manual
00809-0100-4026, Rev HA
Appendix A: Reference data
November 2014
Reference Data
Saturation levels
 Standard: Low=3.9 mA, High=20.8 mA
 Namur NE43: Low = 3.8 mA, High = 20.5 mA
Figure A-5. Alarm Levels
Load limitations
Maximum load resistance (R) is determined by the voltage level of the external power supply
(U
E
), as described by Figure A-6 to Figure A-8:
Figure A-6. Non-Hazardous Installations
Figure A-7. Intrinsically Safe Installations
Rosemount alarm level
Normal operation
3.75 mA
(1)
(1) Transmitter Failure, hardware or software alarm in Low position.
4 mA 20 mA 21.75 mA
(2)
(2) Transmitter Failure, hardware or software alarm in High position.
3.9 mA 20.8 mA
low saturation high saturation
10 20
16
30
200
400
600
800
1000
1200
1400
40 50
42.424
586
1387
External Power Supply Voltage U
E
(V)
Maximum Load Resistance R(
:)
Operating
region
10 20
16
30
200
400
600
800
1000
1200
1400
40 50
24
586
847
External Power Supply Voltage U
E
(V)
Maximum Load Resistance R(
:)
Operating
region