Siemens RD150

41
MAN-100472 RD150 - Operating Instructions
57030-EN-180717
Connection of the feeding power supply
unit
Networks of overvoltage category III
Altitude above sea level
Ʋ by default up to 2000 m (6562 ft)
Ʋ with connected overvoltage protection up to 5000 m (16404 ft)
Pollution degree
2)
4
Protection class II
10.2 HART communication
The HART protocol operates with frequency shift keying (FSK) based on the data communication
standardBell202.Thedigitalsignalisgeneratedfromthefrequencies1200and2200Hz,which
represent the bit information 1 and 0. Sine curves with these frequencies are superimposed on the
directcurrentinthewirepairoftheeldinstrument.Theaveragevalueofthesuperimposedsignal
iszero.Forthatreason,the4…20mAsignalisnotinuencedbythesimultaneousdigitaldata
transmission.
Supported HART commands
Command no. Command name Description
0
ReadUniqueIdentier Sensoridentication
1 Read primary variable Primary Value with unit
3 Read current 4 Variables PV, SV, QV, TV with unit
13 Read Tag, descriptor, date Sensor TAG, …
15 Read output information Scaling values
18 Write Damping value Damping
34 Write Tag, descriptor, date Sensor TAG, …
35 Write range values Write scaling values
36 Set upper range value Max. adjustment/SPAN
37 Set lower range value Min. adjustment/ZERO
44 Write PV units PV unit
2)
 Whenusedwithfullledhousingprotection