AMX Wave Wireless Accessories and Adapters none Manual de usuario descargar pdf (Pagina 15)

Rosemount 3300 Series

October 2014

www.rosemount.com

External Power Supply

The input voltage (U

) for HART is 11 to 42 Vdc

(11 to 30 Vdc in IS applications, and 16 to 42 Vdc

in Explosion-proof/Flameproof applications).

For Flameproof/Explosion-proof installations the

Rosemount 3300 Series transmitters have a

built-in barrier; no external barrier needed.

When a Smart Wireless THUM adapter is fitted,

it adds a maximum drop of 2.5 Vdc in the

connected loop.

R = Load Resistance (); U

= External Power

Supply Voltage (Vdc); and U

= Input Voltage (Vdc)

IS Electrical Parameters U

= 30 V, l

= 130 mA, P

= 1 W, L

= 0, C

= 0

Signal on Alarm Standard: Low = 3.75 mA. High = 21.75 mA; Namur NE43: Low = 3.6 mA. High = 22.5 mA

Saturation Levels Standard: Low = 3.9 mA. High=20.8 mA; Namur NE43: Low = 3.8 mA. High = 20.5 mA

Load Limitations

Maximum load resistance is determined by the voltage level of the external power supply, as

described by:

400

800

1200

1600

20 30

4224

650

1550

400

800

1200

1600

11 20 30 40 50

950

650

R ()

(V)

R ()

(V)

Operating

Region

=External Power Supply Voltage; R () = Maximum Load Resistance

11 20 30 40 50

400

800

1200

1600

1300

24 42

(V)

R ()

Operating

Region

Non-Hazardous Installations Intrinsically Safe Installations

Explosion-proof/Flameproof

(Ex d) Installations

Note

For the Ex d case, the diagram is only valid if

the HART load resistance is at the + side,

otherwise the load resistance value is limited

to 300 

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 43 44

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