6
Interfaces
6.1
HART
6.1.1
HART
with hand-held terminal or HART
Communicator
In addition to field operation, the MyPro
CLM 431 / CLD 431 transmitter can also be
accessed via the universal hand-held terminal
DXR 275 or a PC with a HART
modem
(Commubox) using the HART
protocol to
query or change parameter settings. This
chapter contains essential information on:
• electrical connection
• operation of HART Communicator
• E+H operating matrix for HART
Note:
Refer to the DXR 275 operating
instructions for details on the hand-
held HART terminal.
Connection of hand-held terminal DXR 275
There are two alternatives for connecting the
hand-held terminal (see fig. 6.1.):
• Direct connection to the measuring trans-
mitter via terminals 1 and 2
• Connection via the 4 ... 20 mA analog
signal line
In both cases, the measuring circuit must
have a resistance of at least 250
Ω
between
the power source and the hand-held terminal.
The max. load at the current output depends
on the supply voltage. The measuring trans-
mitter input voltage for the maximum current
consumption of 22 mA must be at least
12 V DC.
4...20 mA
Test
1
3
2
+
0000
HART Handterminal
1
Offline
3
Transfer
4
Frequenzg erät
5
Extras
2
Online
➔
I
O
HART Handterminal
1
Offline
3
Transfer
4
Frequenzg erät
5
Extras
2
Online
➔
I
O
HART Handterminal
1
Offline
3
Transfer
4
Frequenzg erät
5
Extras
2
Online
➔
I
O
HART Handterminal
1
Offline
3
Transfer
4
Frequenzg erät
5
Extras
2
Online
➔
I
O
any connected device/resistance
Min. 250
Ω
4...20 mA
BE018Y40.CDR
Fig. 6.1
Electrical connection of
hand-held HART
terminal
LM431CE6.CHP
mypro CLM 431 / CLD 431 conductive
Interfaces
Hauser
37
Summary of Contents for mypro CLD 431
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