Emerson 1700 Manuel D’Utilisation

56

The transmitter has two pairs of wiring terminals for the 4-wire connection to the core processor:

•

One pair is used for the RS-485 connection

•

One pair is used to supply power to the core processor

Plug connectors accept stranded or solid conductors, 24 to 12 AWG (0,2 to 2,5 mm

2

).

Model 2700 transmitters with F

OUNDATION

 fieldbus and PROFIBUS-PA are either FISCO or FNICO 

approved depending on their output code:

•

Transmitters with output code E (intrinsically safe F

OUNDATION

 fieldbus) or output code G 

(PROFIBUS-PA) are FISCO approved with the following entity parameters:

-

Ui  =  30  V

-

Ii = 380 mA

-

Pi  =  5.32  W

-

Ci = 0.0002 µF

-

Li  =  0.0  mH

•

Transmitters with output code N (non-incendive F

OUNDATION

 fieldbus) are FNICO approved

•

4-wire remote: one intrinsically safe 4-wire mating connector

•

9-wire remote: two intrinsically safe terminal blocks with 3 sockets and one intrinsically safe 
terminal block with 4 sockets (only 3 sockets are used)

•

Remote core processor with remote transmitter: 

-

Core processor: two intrinsically safe terminal blocks with 3 sockets and one intrinsically 
safe terminal block with 4 sockets (only 3 sockets are used)

-

Transmitter: one intrinsically safe 4-wire mating connector

One 4–20 mA output

•

Not intrinsically safe

•

Internally powered (active)

•

Isolated to ±50 VDC from all other outputs and earth ground

•

Maximum load limit: 820 Ohms

•

Model 1700 can report mass flow or volume flow; Model 2700 can report mass flow, volume 
flow, density, temperature, or drive gain; transmitters with the petroleum measurement 
application (API) or enhanced density application can also report standard volume flow and 
density at reference temperature

•

Linear with process from 3.8 to 20.5 mA, per NAMUR NE43 (June 1994)