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Functions, monitoring and protective functions
9.5 Monitoring functions and protective functions
The measured cable resistance is then taken into account when evaluating the temperature.
The cable resistance value is saved in p4110[0...11].
Note
Line resistance
The value for the cable resistance in p4110[0...11] can also be entered directly.
Line filter
A mains filter is available to suppress radiated noise. Using p4121, the filter can be set to a
50 Hz or 60 Hz rated line frequency.
9.5.6.2
Measurement with up to 6 channels
Temperature measurement with a sensor in 2-wire technology
With p4108[0...5] = 0, you evaluate a sensor in a 2-wire system at a 4-wire connection at
terminals 1(+) and 2(-).
Terminals 3 and 4 remain open.
Temperature measurement with a sensor in 3-wire technology
With p4108[0...5] = 2, you sense the signals from a sensor in 3-wire system at a 4-wire
connection at terminals 3(+) and 4(-).
The measuring wire is connected at terminal 1(+).
You must short-circuit terminals 2(-) and 4(-).
Temperature measurement with a sensor in 4-wire technology
With p4108[0...5] = 3, you sense the signals from a sensor in a 4-wire system at a 4-wire
connection at terminals 3(+) and 4(-).
The measuring wire is connected at terminals 1(+) and 2(-).
9.5.6.3
Measurement with up to 12 channels
Temperature measurement with two sensors in 2-wire technology
With p4108[0...5] = 1, you sense two sensors in a 2-wire system.
The first sensor is connected at terminals 1(+) and 2(-).
The second sensor (number = first sensor + 6) is connected at terminals 3(+) and 4(-).
When connecting two sensors in a 2-wire system to terminal X531, the first sensor is
assigned to temperature channel 1 and the second sensor is assigned to channel 7 (1+6).
712
Operating Instructions, 12/2018, A5E36652151A
Enclosed Drives
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