Siemens SITRANS LR250 Guide De Mise En Service Rapide page 13

How to select a passive barrier (continued)
4) Determine the value of Vbarrier from the barrier data sheet (for example, voltage drops
due to diodes).
5) Calculate Vworking = Vsupply – Vbarrier.
6) Use the values for Vworking and Rworking to confirm that operation is within the shaded
area of the graph
Limited/ Non-incendive
Active barriers (repeating barriers)
Manufacturer
MTL
MTL
Siemens
Stahl
MTL
MTL
2. Non-Sparking/Energy Limited wiring
The ATEX certificate listed on the nameplate
can be downloaded from the product page of our website at: www.siemens.com/LR250.
Go to: Support > Approvals / Certificates.
• For power demands see
Energy Limited/ Non-incendive
• For wiring requirements follow local regulations.
3. Non-Incendive wiring
FM/CSA Class 1, Div 2 connection drawing number 23650673
can be downloaded from the product page of our website at:
www.siemens.com/LR250. Go to Support > Installation Drawings > Level Measurement >
Continuous - Radar.
• For power demands see
Limited/ Non-incendive
A5E31997170
Curve 1: General Purpose, Intrinsically Safe, Non-Sparking/Energy
on page 23.
Part Number
706
7206
SITRANS I 7NG4124
9001/51-280-110-14
E02009
E02010
Curve 1: General Purpose, Intrinsically Safe, Non-Sparking/
on page 23.
Curve 1: General Purpose, Intrinsically Safe, Non-Sparking/Energy
on page 23.
SITRANS LR250 (HART) – QUICK START MANUAL Page EN-11