Siemens SITRANS LR260 Operating Instructions Manual page 25

1. Strip the cable jacket for approximately
70 mm (2.75") from the end of the cable, and
thread the wires through the gland
2. Connect the wires to the terminals as
shown: the polarity is identified on the
terminal block.
3. Ground the instrument according to local
regulations.
4. Tighten the gland to form a good seal.
Connecting HART
Typical PLC/mA configuration with HART
2
power supply
SITRANS LR260
1)
If cable is routed through conduit, use only approved suitable-size hubs for
waterproof applications.
2)
Depending on the system design, the power supply may be separate from the
PLC, or integral to it.
3)
Loop resistance (total of cable resistance plus 250 Ohm [resistor]) must be less
than 550 Ohm for the device to function properly.
7ML19985KE02 SITRANS LR260 (HART) – INSTRUCTION MANUAL
1)
.
2)3)
active PLC
3
R= 250 :
HART
communicator
cable shield
(if used)
HART modem
Page 19