Siemens SITRANS LR460 Kurzanleitung Seite 9

SITRANS LR460 HART wiring
(continued from
Note:
Install in accordance with
HCF_LIT-34), available from: http://www.hartcomm.org/technical/doclist.html.
AC version
Connecting HART
LR460
4.
5.
A5E32007360
Downloaded from www.Manualslib.com
Connecting SITRANS LR460
LR460 HART requires no power from the 4-20 mA loop.
Wiring and Installation
cable clamp

R = 250
Notes:
• For error-free communication via the HART protocol, a 250 Ohm
resistor may be required if the loop resistance is less than
250 Ohms.
• Only one HART communication device should be inserted in the loop.
Connect the earth conductor of the power supply to
the earth terminal on the metal bracket inside
the enclosure. Adjust the cable length so that the
earth conductor would be last to disconnect if cable
is pulled.
Tighten the cable gland and check the strain relief
(pull and turn).
SITRANS LR460 – QUICK START MANUAL
manuals search engine
on page 6)
in the HART Application Guide (order number
DC version
earth
terminal
Typical PLC/mA configuration with HART
PLC with mA
input card
HART
Communicator
375
earth
cable clamp
terminal
PC/laptop with
HART modem
running PDM
cable
glands
earth
(ground)
terminal
Page EN-7