4-20mA Sensor Tables
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Part No.
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Variant Description
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Quantity
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Quantity Description
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Value @ 4mA
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Value @ 20mA
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Units
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Suggested AoC
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RS485 Sensor Tables
VTI21-VT1
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Slave Channel
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Quantity
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Description
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Typical Range
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Units
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Suggested AoC
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VTI21-TI21 / VTI21-FS25 / VTI21-FS26
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Slave Channel
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VTI21 Input Channel
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Quantity
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Description
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Typical Range
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Units
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Suggested AoC
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4-20mA Sensor Tables
Part No. | Variant Description | Quantity | Quantity Description | Value @ 4mA | Value @ 20mA | Units | Suggested AoC |
|---|---|---|---|---|---|---|---|
| VTI21-VT1 | AC Vane Relay Variant | Torque | Instantaneous Torque Exerted on the relay vane. | -25 | +25 | m.Nm | 0.2 m.Nm |
| VTI21-HVI | HVI Receiver Variant | Average Current | Average HVI Current seen by the VTI21 from input channel 1. | 0 | 1500 | mA | 5mA |
| VTI21-TI21 | TI21 / EbiTrack 200 Variant | Average Current | Average of upper and lower sideband current from VTI21 input channel 1. | 0 | 1500 | mA | 5 mA |
| VTI21-FS25 | FS2500 Receiver Variant | Center Current | Amplitude of the FS2500 center frequency current from VTI21 input channel 1. | 0 | 1500 | mA | 5 mA |
| VTI21-FS26 | FS2600 Receiver Variant | Center Current | Amplitude of the FS2500 center frequency current from VTI21 input channel 1. | 0 | 1500 | mA | 5 mA |
| VTI21-ACS-001 | General Purpose AC sensing up to 1.5A RMS | Current | RMS current from VTI21 input channel 1. | 0 | 2500 | mA | 25 mA |
| VTI21-ACS-020 | General Purpose AC sensing up to 20A RMS | Current | RMS current from VTI21 input channel 1. | 0 | 20 | A | 0.2 A |
| VTI21-UM71 | UM71 Variant | Current | Current at selected center frequency. | 0 | 5000 | µA | 100µA |
| VTI21-Reed | Reed Relay Variant | Current | Current measured across the Reed relay frequency range on input channel 1. | 0 | 5000 | mA | 100mA |
RS485 Sensor Tables
VTI21-VT1
Slave Channel | Quantity | Description | Typical Range | Units | Suggested AoC |
|---|---|---|---|---|---|
| 1 | Torque | Instantaneous torque exerted on the relay vane | -25 to +25 | m.Nm | 0.2 m.Nm |
| 2 | Phase | Phase angle between local coil and control coil currents | 0 to 180 | Degrees | 2 degrees |
| 3 | Local Current | RMS current in the local coil | 0 to 500 | mA | 5 mA |
| 4 | Control Current | RMS current in the track coil | 0 to 1000 | mA | 5 mA |
| 5 | Chatter | Degree of chatter | 0 to 100 | % | 5 % |
VTI21-TI21 / VTI21-FS25 / VTI21-FS26
Slave Channel | VTI21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC |
|---|---|---|---|---|---|---|
| 1 | 1 | Center Frequency | The Center frequency, in hertz, of the track circuit. | 388.8 to 508.8 | Hz | 1 Hz |
| 2 | 1 | Center frequency Current | Total RMS current at the target center frequency | 0 to 1000 | mA | 5 mA |
| 3 | 1 | Lower Side Band current | Total RMS current at the target lower side band frequency | 0 to 1000 | mA | 5 mA |
| 4 | 1 | Upper Side Band current | Total RMS current at the target upper side band frequency | 0 to 1000 | mA | 5 mA |
| 5 | 1 | In Band Current | Total RMS current seen by the transducer between 300 to 600 Hz | 0 to 1000 | mA | 5 mA |
| 6 | 1 | Spectrogram or Gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. When spectrum data is not being acquired, this channel shows the current amplifier gain setting | 4.8 to 1228.8 | Hz | NA |
| 7 | 1 | Loudest Frequency | The strongest frequency, in hertz, observed in the incoming waveform. | 4.8 to 1228.8 | Hz | 1 Hz |
| 8 | 1 | Total Current | Total RMS current seen by the transducer. | 0 to 1000 | mA | 5 mA |
| 9 | 2 | Center Frequency | The Center frequency, in hertz, of the track circuit. | 388.8 to 508.8 | Hz | 1 Hz |
| 10 | 21 | Center frequency Current | Total RMS current at the target center frequency | 0 to 1000 | mA | 5 mA |
| 311 | 12 | Lower Side Band current | Total RMS current at the target lower side band frequency | 0 to 1000 | mA | 5 mA |
| 412 | 12 | Upper Side Band current | Total RMS current at the target upper side band frequency | 0 to 1000 | mA | 5 mA5 |
| 13 | 12 | In Band Current | Total RMS current seen by the transducer between 300 to 600 Hz | 0 to 1000 | mA | 5 mA |
| 614 | 12 | Spectrogram or Gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. When spectrum data is not being acquired, this channel shows the current amplifier gain setting | 4.8 to 1228.8 | Hz | NA |
| 715 | 12 | Loudest Frequency | The strongest frequency, in hertz, observed in the incoming waveform. | 4.8 to 1228.8 | Hz | 1 Hz |
| 816 | 12 | Total Current | Total RMS current seen by the transducer. | 0 to 1000 | mA | 5 mA |
| 9 | 2 | Center Frequency | The Center frequency, in hertz, of the track circuit. | 388.8 to 508.8 | Hz | 1 Hz |
| 10 | 2 | Center frequency Current | Total RMS current at the target center frequency |
VTI21-HVI
Slave Channel | VTI21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Slave Channel | VTI21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC | ||||||||
| 1 | 1 | Average Current | The average RMS current of the positive and negative portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA | ||||||||
| 2 | 1 | Positive Peak | Peak magnitude of the positive portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA | ||||||||
| 113 | 2 | Lower Side Band current | Total RMS current at the target lower side band frequency1 | Negative Peak | Peak magnitude of the negative portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA | ||||||
| 124 | 2 | Upper Side Band current | Total RMS current at the target upper side band frequency | 0 to 1000 | mA | 5 mA | 13 | 2 | In Band 1 | Frequency | Frequency of the HVI pulse train | 0 to 5 | Hz | 0.1 Hz |
| 5 | 1 | Total Current | Total RMS current seen by the transducer between 300 to 600 HzVTI21 receiver | 0 to 1000 | mA | 5 mA | ||||||||
| 146 | 2Spectrogram or Gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. When spectrum data is not being acquired, this channel shows the current amplifier gain setting | 4.8 to 1228.8 | Hz | NA | |||||||||
| 15 | 2 | Loudest Frequency | The strongest frequency, in hertz, observed in the incoming waveform. | 4.8 to 1228.8 | Hz | 1 Hz | ||||||||
| 16 | 2 | Total Current | Total RMS current seen by the transducer.Average Current | The average RMS current of the positive and negative portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA | |||||||
| 7 | 2 | Positive Peak | Peak magnitude of the positive portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA | ||||||||
| 8 | 2 | Negative Peak | Peak magnitude of the negative portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA |
VTI21-HVI
| 1 | 1 | Average Current | The average RMS current of the positive and negative portion of the HVI pulse signal9 | 2 | Frequency | Frequency of the HVI pulse train | 0 to 5 | Hz | 0.1 Hz |
| 10 | 2 | Total Current | Total RMS current seen by the transducer. | 0 to 1000 | mA | 5 mA | |||
| 2 | 1 | Positive Peak | Peak magnitude of the positive portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA | |||
| 3 | 1 | Negative Peak | Peak magnitude of the negative portion of the HVI pulse signal | 0 to 1000
VTI21-ACS-001
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Slave Channel
VTI21 Input Channel
Quantity
Description
Typical Range
Units
Suggested AoC
Slave Channel | VTI21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | CH 1 Current | RMS current observed on Channel 1 | 0 to 2500 | mA | 5 mA | |||||||
| 42 | 12 | Frequency | Frequency of the HVI pulse trainCH 2 Current | RMS current observed on Channel 2 | 0 to 52500 | Hz | 0.1 Hz | 5 | 1 | Total Current | Total RMS current seen by the VTI21 receiver | 0 to 1000mA | 5 mA |
| 3 | NA | Derived Current | RMS current derived for an unmonitored 3rd phase in a balanced three-phase system. | 0 to 2500 | mA | 5 mA | |||||||
| 64 | 2 | Average Current | The average RMS current of the positive and negative portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA | |||||||
| 7 | 2 | Positive Peak | Peak magnitude of the positive portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA | |||||||
| 8 | 2 | Negative Peak | Peak magnitude of the negative portion of the HVI pulse signal | 0 to 1000 | mA | 5 mA | |||||||
| 9 | 2 | Frequency | Frequency of the HVI pulse train | 0 to 5 | Hz | 0.1 Hz | |||||||
| 10 | 2 | Total Current | Total RMS current seen by the transducer. | 0 to 1000 | mA | 5 mA |
VTI21-ACS-001
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Slave Channel
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VTI21 Input Channel
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Quantity
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Description
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Typical Range
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Units
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Suggested AoC
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VTI21-ACS-020
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Slave Channel
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VTI21 Input Channel
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Quantity
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Description
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Typical Range
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Units
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Suggested AoC
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| NA | CH1 Leads CH2 | Digital Output - TRUE if the waveform on CH1 is observed to lead that of CH2 | TRUE or FALSE | NA | NA | |
| 5 | NA | CH1 Lags CH2 | Digital Output - TRUE if the waveform on CH1 is observed to lag that of CH2 | TRUE or FALSE | NA | NA |
VTI21-ACS-020
Slave Channel | VTI21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC |
|---|---|---|---|---|---|---|
| 1 | 1 | CH 1 Current | RMS current observed on Channel 1 | 0 to 20 | A | 0.2 A |
| 2 | 2 | CH 2 Current | RMS current observed on Channel 2 | 0 to 20 | A | 0.2 A |
| 3 | NA | Derived Current | RMS current derived for an unmonitored 3rd phase in a balanced three-phase system. | 0 to 20 | A | 0.2 A |
| 4 | NA | CH1 Leads CH2 | Digital Output - TRUE if the waveform on CH1 is observed to lead that of CH2 | TRUE or FALSE | NA | NA |
| 5 | NA | CH1 Lags CH2 | Digital Output - TRUE if the waveform on CH1 is observed to lag that of CH2 | TRUE or FALSE | NA | NA |
VTI21-UM71
Slave Channel | VTI21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | CH 1 Frequency | Channel 1 Frequency Selected | 1700 to 2600 | Hz | 1 | |||
| 2 | 1 | CH 1 Side Band Ratio | Ratio of lower to upper frequency (0%=all lower, 100%=all upper) | 0 to 100% | % | 5 | |||
| 3 | 1 | CH 1 Raw Frequency | Simple Frequency Measurement (zero crossings) | 1600 to 2700 | Hz | 100 | |||
| 4 | 1 | CH 1 Total Current | Total current in the UM71 band | 0 to 5mA | µA | 100 | |||
| 5 | 1 | CH 1 current 1700Hz | Current measured at 1700Hz | 0 to 5mA | µA | 100 | |||
| 6 | 1 | CH 1 current 2000Hz | Current measured at 2000Hz | 0 to 5mA | µA | 100 | |||
| 7 | 1 | CH 1 current 2300Hz | Current measured at 2300Hz | 0 to 5mA | µA | 100 | |||
| 8 | 1 | CH 1 current 2600Hz | Current measured at 2600Hz | 0 to 5mA | µA | 100 | |||
| 9 | 1 | CH 1 Spectrogram or Gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. | 1 to 32 | 1 | ||||
| 10 | 2 | CH 2 Frequency | Channel 1 Frequency Selected | 1700 to 2600 | Hz | 1 | |||
| 11 | 2 | CH 2 Side Band Ratio | Ratio of lower to upper frequency (0%=all lower, 100%=all upper) | 0 to 100% | % | 5 | |||
| 12 | 2 | CH 2 Raw Frequency | Simple Frequency Measurement (zero crossings) | 1600 to 2700 | Hz | 100 | |||
| 13 | 2 | CH 2 Total Current | Total current in the UM71 band | 0 to 5mA | µA | 100 | |||
| 14 | 2 | CH 2 current 1700Hz | Current measured at 1700Hz | 0 to 5mA | µA | 100 | |||
| 15 | 2 | CH 2 current 2000Hz | Current measured at 2000Hz | 0 to 5mA | µA | 100 | |||
| 16 | 2 | CH 2 current 2300Hz | Current measured at 2300Hz | 0 to 5mA | µA | 100 | |||
| 17 | 12 | CH | 12 current | 1700Hz2600Hz | Current measured at | 1700Hz2600Hz | 0 to 5mA | µA | 100 | 6
| 18 | 12 | CH | 1 current 2000HzCurrent measured at 2000Hz | 0 to 5mA | µA | 100 | |||
| 7 | 1 | CH 1 current 2300Hz | Current measured at 2300Hz | 0 to 5mA | µA | 100 | |||
2 Spectrogram or Gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. | 1 to 32 | 1 |
VTI21-Reed
Slave Channel | VTI21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC |
|---|---|---|---|---|---|---|
| 1 | 1 | CH 1 |
| Frequency | Simple Frequency Measurement (zero crossings) | 0 to |
| 5000 |
| Hz |
| 1 |
| 2 | 1 | CH 1 |
Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram.
| Total Current | Total current measured in the reed relay frequency range | 0 to 5A | mA | 50 | ||
| 3 | 1 | CH 1 - channel 211 | Total Current at 363Hz | 0 to 5A | mA | 50 |
| 4 | 1 | CH 1 - channel 212 | Total Current at 366Hz | 0 to 5A | mA | 50 |
| 5 | 1 | CH 1 - channel 213 | Total Current at 369Hz | 0 to 5A | mA | 50 |
| 6 | 1 | CH 1 - channel 214 | Total Current at 372Hz | 0 to 5A | mA | 50 |
| 7 | 1 | CH 1 - channel 215 | Total Current at 375Hz | 0 to 5A | mA | 50 |
| 8 | 1 | CH 1 - channel 216 | Total Current at 378Hz | 0 to 5A | mA | 50 |
| 9 | 1 | CH 1 - channel 217 | Total Current at 381Hz | 0 to 5A | mA | 50 |
| 10 | 1 | CH 1 - channel 218 | Total Current at 384Hz | 0 to 5A | mA | 50 |
| 11 | 1 | CH 1 - spectrogram / gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. |
VTI21-Reed
Slave Channel | VTI21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC | |
|---|---|---|---|---|---|---|---|
| 1 | 1 | CH 1note: includes only measured frequencies, which are: 363, 366, 369, 372, 375, 378, 381, 384, 408, 417, 423Hz | |||||
| 12 | 2 | CH 2 Frequency | Simple Frequency Measurement (zero crossings) | 0 to 5000 | Hz | 1 | |
| 13 | 21 | CH | 12 Total Current | Total current measured in the reed relay frequency range | 0 to 5A | mA | 50 |
| 314 | 12 | CH 1 2 - channel 211 | Total Current at 363Hz | 0 to 5A | mA | 50 | |
| 415 | 12 | CH 1 2 - channel 212channel 212 | Total Current at 366Hzat 366Hz | 0 to 5A | mA | 50 | |
| 516 | 12 | CH 1 2 - channel 213channel 213 | Total Current at 369Hzat 369Hz | 0 to 5A | mA | 50 | |
| 617 | 12 | CH 1 2 - channel 214channel 214 | Total Current at 372Hzat 372Hz | 0 to 5A | mA | 50 | |
| 718 | 12 | CH 1 2 - channel 215channel 215 | Total Current at 375Hzat 375Hz | 0 to 5A | mA | 50 | |
| 819 | 12 | CH 1 2 - channel 216channel 216 | Total Current at 378Hzat 378Hz | 0 to 5A | mA | 50 | |
| 920 | 12 | CH 1 2 - channel 217channel 217 | Total Current at 381Hzat 381Hz | 0 to 5A | mA | 50 | |
| 1021 | 12 | CH 1 2 - channel 218channel 218 | Total Current at 384Hzat 384Hz | 0 to 5A | mA | 50 | |
| 1122 | 12 | CH 1 2 - spectrogram / gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. note: includes only measured frequencies, which are: 363, 366, 369, 372, 375, 378, 381, 384, 408, 417, 423Hz | ||||
| 12 | 2 | CH 2 Frequency | Simple Frequency Measurement (zero crossings) | 0 to 5000 | Hz | 1 | |
| 13 | 2 | CH 2 Total Current | Total current measured in the reed relay frequency range | 0 to 5A | mA | 50 | |
| 14 | 2 | CH 2 - channel 211 | Total Current at 363Hz | 0 to 5A | mA | 50 | |
| 15 | 2 | CH 2 - channel 212 | Total Current at 366Hz | 0 to 5A | mA | 50 | |
| 16 | 2 | CH 2 - channel 213 | Total Current at 369Hz | 0 to 5A | mA | 50 | |
| 17 | 2 | CH 2 - channel 214 | Total Current at 372Hz | 0 to 5A | mA | 50 | |
| 18 | 2 | CH 2 - channel 215 | Total Current at 375Hz | 0 to 5A | mA | 50 | |
| 19 | 2 | CH 2 - channel 216 | Total Current at 378Hz | 0 to 5A | mA | 50 | |
| 20 | 2 | CH 2 - channel 217 | Total Current at 381Hz | 0 to 5A | mA | 50 | |
| 21 | 2 | CH 2 - channel 218 | Total Current at 384Hz | 0 to 5A | mA | 50 | 22 | 2 | CH 2 - spectrogram / gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. note: includes only measured frequencies, which are: 363, 366, 369, 372, 375, 378, 381, 384, 408, 417, 423Hz |
, 384, 408, 417, 423Hz |
Aster
| Slave Channel | VTI21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC Threshold |
| 1 | 1 | Lock-on Frequency | Ideal operating frequency track circuit | 1700 to 2600 | Hz | 1 |
| 2 | 1 | In-band Current | RMS current in the operating band | 0-5000 | uA | 50 |
| 3 | 1 | Principle Frequency | Loudest frequency observed (actual operating frequency) | 1700 to 2600 | Hz | 1 |
| 4 | 1 | Total Current | broad-and RMS current | 0-5000 | uA | 50 |
| 5 | 1 | 1700 Hz Band Current | RMS current in the 1700 Hz band | 0-5000 | uA | 50 |
| 6 | 1 | 2000 Hz Band Current | RMS current in the 1900 Hz band | 0-5000 | uA | 50 |
| 7 | 1 | 2300 Hz Band Current | RMS current in the 2100 Hz band | 0-5000 | uA | 50 |
| 8 | 1 | 2600 Hz Band Current | RMS current in the 2300 Hz band | 0-5000 | uA | 50 |
| 9 | 1 | Gain / FFT | Pre-amp Gain as AoC, Spectrogram is acquired as a triggered capture | 10 | Hz | NA |
| 10 | 2 | Lock-on Frequency | Ideal operating frequency track circuit | 1700 to 2600 | Hz | 1 |
| 11 | 2 | In-band Current | RMS current in the operating band | 0-5000 | uA | 50 |
| 12 | 2 | Principle Frequency | Loudest frequency observed (actual operating frequency) | 1700 to 2600 | Hz | 1 |
| 13 | 2 | Total Current | broad-and RMS current | 0-5000 | uA | 50 |
| 14 | 2 | 1700 Hz Band Current | RMS current in the 1700 Hz band | 0-5000 | uA | 50 |
| 15 | 2 | 2000 Hz Band Current | RMS current in the 1900 Hz band | 0-5000 | uA | 50 |
| 16 | 2 | 2300 Hz Band Current | RMS current in the 2100 Hz band | 0-5000 | uA | 50 |
| 17 | 2 | 2600 Hz Band Current | RMS current in the 2300 Hz band | 0-5000 | uA | 50 |
| 118 | 2 | Gain / FFT | Pre-amp Gain as AoC, Spectrogram is acquired as a triggered capture | 10 | Hz | NA |