Plc Input Modules; Passive Shunt Diode Barriers; Active Barriers (Repeating Barriers) - Siemens SITRANS Probe LU Operating Instructions Manual

5. Determine any non-linear voltage drops due to the barrier (Vbarrier) from the barrier
data sheet (for example, voltage drops due to diodes).
6. Calculate Vworking = Vsupply – Vbarrier.
7. Using Vworking and Rworking, confirm that operation is within the shaded area of
the graph Loop Voltage versus Loop Resistance on page 95.
Notes:
• The following list is not complete: there are many safety barriers on the market,
which will work with the SITRANS Probe LU.
• The barriers listed below have all been tested and are functionally compatible with
the SITRANS Probe LU.
• The barriers listed below are all HART compatible.

PLC Input Modules

Manufacturer
Siemens

Passive Shunt Diode Barriers

A well regulated supply voltage is required.
Note:
Manufacturer
MTL
Stahl
Stahl

Active barriers (repeating barriers)

Manufacturer
Siemens
MTL
MTL
Stahl
Page 96 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS
Part Number
SM331 PCS7 HART Input Module
Part Number
7787P+ (Dual channel)
9001/01-280-100-10 (Single channel)
9002/01-280-110-10 (Dual channel)
Part Number
7NG4122-1AA10
706
7206
9001/51-280-110-14
A5E32337695