Operating Instructions

Table Of Contents
Typical PLC/mA configuration with HART
5 ˖

SITRANS LR260
Power supply
1)
Active PLC
HART modem
HART communicator
1)
Depending on the system design, the power supply may be separate from the PLC, or integral
to it.
2)
Loop resistance (total of cable resistance plus 250 Ohm [resistor]) must be less than 550 Ohm
for the device to function properly.
5.3 Hazardous area installation
WARNING
Improper power supply
Risk of explosion in hazardous areas as result of incorrect power supply.
Connect the device in accordance with the specified power supply and signal circuits. The
relevant specifications can be found in the certificates, in Technical data (Page 125) or on
the nameplate.
Connecting
5.3 Hazardous area installation
SITRANS LR260 with mA/HART
40 Operating Instructions, 11/2019, A5E32337683-AD