Siemens 7ML5431 - Loop Power; Allowable Operating Area of SITRANS LR250

Appendix A: Technical reference
A.6 Loop power
SITRANS LR250 with mA/HART
256 Operating Instructions, 10/2019, A5E32220602-AG
A.6 Loop power
Note
Loop voltage is the voltage at the terminals of the power supply (not the voltage at the
terminals of the device).
①
Loop voltage VL
②
Power supply
③
Loop resistance RL
④
Loop current IL
⑤
LR250
A.6.1 Allowable operating area of SITRANS LR250
Note
The curves below apply to a standalone device, configured via the Siemens handheld
programmer.