Siemens sitrans PROBE LU - PLC Input Modules; Passive Shunt Diode Barriers; Active Barriers (Repeating Barriers)

Page 96 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS A5E32337695
G: Hazardous Installation
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.
PLC Input Modules
Passive Shunt Diode Barriers
Active barriers (repeating barriers)
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.
Manufacturer Part Number
Siemens SM331 PCS7 HART Input Module
Note: A well regulated supply voltage is required.
Manufacturer Part Number
MTL 7787P+ (Dual channel)
Stahl 9001/01-280-100-10 (Single channel)
Stahl 9002/01-280-110-10 (Dual channel)
Manufacturer Part Number
Siemens 7NG4122-1AA10
MTL 706
MTL 7206
Stahl 9001/51-280-110-14