Siemens Sitrans LR250 User Manual

Connecting
5.3 Wiring setups for hazardous area installations
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
45
5.3
Wiring setups for hazardous area installations
There are three wiring options for hazardous area installations:
● Intrinsically safe wiring (Page 46)
● Non-sparking wiring (Page 49)
● Non-incendive wiring (US/Canada only) (Page 49)
In all cases, check the nameplate on your device, confirm the approval rating, and perform
installation and wiring according to your local safety codes.
PLC configuration with PROFIBUS PA for hazardous areas
①
PLC (active)
②
PC/laptop
③
Ex ia type DP/PA coupler
④
Ex ia device

Siemens Sitrans LR250 Specifications

General

Accuracy	± 2 mm
Power Supply	10.5 to 42 V DC
Measurement Principle	Radar
Process Temperature	-40 to +80 °C
Process Pressure	Up to 40 bar
Output Signal	4 to 20 mA HART
Communication	HART
Enclosure Rating	IP68
Housing Material	Aluminum, stainless steel