Siemens LMV52.240B1 - Example: Temperature Transmitter Wired to Terminal X61

Technical Instructions LMV Series
Document No. LV5-800
0
Appendix A Page 34 SCC Inc.
Remote Setpoint (continued)
Example: Temperature Transmitter Wired to Terminal X
61
LC_OptgMode = IntLC X62
Ext Inp X62 U/I = 4..20 mA
MRange TempSens = 300 °F
Desired remote setpoint range = 200-240 °F
A 4-20 mA signal on terminal X62 scales the setpoint from 32-300 °F. Parameters “Ext
MinSetpoint” and “Ext MaxSetpoint” need to be utilized to get the appropriate setpoint range.
 = 
200℉ − 32℉
302℉ − 32℉
=
168
270
= 62%
 = 
240℉ − 32℉
302℉ − 32℉
=
208
270
= 77%
With these parameters set, the f
ollowing input signals will scale the setpoint accordingly:
4 – 13.9 mA = 200 °F (limited by “Ext MinSetpoint”)
13.9 – 16.3 mA = 200 - 240 °F
16.3 - 20 mA = 240 °F (limited by “Ext MaxSetpoint”)
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