Operating Instructions

Table Of Contents
1 2
3
4
5
Loop voltage VL
Power supply
Loop resistance RL
Loop current IL
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.
A.6.2 Curve 1 (General Purpose, Intrinsically Safe, Non-Sparking, Non-incendive)
Loop Voltage versus Loop Resistance
/RRS5HVLVWDQFH5
/
/RRS9ROWDJH9
/
$//2:$%/(
23(5$7,1*$5($
3RZHU6XSSO\5HTXLUHPHQWV
9˖
9˖
9˖
9˖
5/ 9/
5/ 9/
Appendix A: Technical reference
A.6 Loop power
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG 245