Astar HT-3300 Dokumentacja Strona 67

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57
Reference Manual
00809-0100-4811, Rev DA
Section 3: Installation
January 2015
Installation
Intrinsically safe output
For intrinsically safe installations wire the transmitter as shown in Figure 3-20.
Note
Make sure the instruments in the loop are installed in accordance with intrinsically safe field
wiring practices and system control drawings when applicable.
Figure 3-20. Wiring Diagram for Intrinsically Safe Installations
For HART communication, a minimum load resistance of 250 within the loop is required. For
maximum load resistance, see Figure 3-18 on page 54.
The power supply voltage ranges from 11 V to 30 V.
IS parameters
U
i
= 30 V
I
i
= 130 mA
P
i
= 1 W
C
i
= 0
L
i
= 0
3.6.6 HART to Modbus Converter (HMC)
For detailed information on requirements and installation guidelines of the HMC module, see
“Rosemount 3300 Series with HART
®
to Modbus
®
Converter” on page 177.
DCS
R
L
= 250
Approved IS barrier
Field
Communicator
HART modem
PC
Power supply
Rosemount 3300
Series radar
transmitter
11 - 30 Vdc
Ground connection
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