Page Comparison

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

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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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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	2

1

Center frequency Current

Total RMS current at the target center frequency

0 to 1000

mA

5 mA

3

11

1

2

Lower Side Band current

Total RMS current at the target lower side band frequency

0 to 1000

mA

5 mA

4

12

1

2

Upper Side Band current

Total RMS current at the target upper side band frequency

0 to 1000

mA

5 mA

5

13

1

2

In Band Current

Total RMS current seen by the transducer between 300 to 600 Hz

0 to 1000

mA

5 mA

6

14

1

2

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

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

NA

1 Hz

7

16

1

2

Loudest FrequencyThe strongest frequency, in hertz, observed in the incoming waveform.4.8 to 1228.8Hz1 Hz81Total CurrentTotal RMS current seen by the transducer.

Total Current

Total RMS current seen by the transducer.

0 to 1000

mA

5 mA

VTI21-HVI

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

9

2

1

Center FrequencyThe Center frequency, in hertz, of the track circuit.388.8 to 508.8Hz1 Hz102Center frequency CurrentTotal RMS current at the target center frequency

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	mA	5 mA

11

4

2Lower Side Band currentTotal RMS current at the target lower side band frequency0 to 1000mA5 mA122Upper Side Band currentTotal RMS current at the target upper side band frequency

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 VTI21 receiver	0 to 1000	mA	5 mA

13

6

2

In Band

Average Current

Total

The average RMS current

seen by the transducer between 300 to 600 Hz

of the positive and negative portion of the HVI pulse signal

0 to 1000

mA

5 mA

14152Loudest FrequencyThe strongest frequency, in hertz, observed in the incoming waveform.4.8 to 1228.8Hz1 Hz16

7

2

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 1228.8HzNA

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-

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001

0 to 1000

Slave Channel	VTI21 Input Channel	Quantity	Description	Typical Range	Units	Suggested AoC
1	1	CH 1 Current

1Average CurrentThe average RMS current of the positive and negative portion of the HVI pulse signal

RMS current observed on Channel 1	0 to 2500	mA	5 mA
2	2	CH 2 Current	RMS current observed on Channel 2	0 to 2500	mA	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

2

4

1Positive PeakPeak magnitude of the positive portion of the HVI pulse signal0 to 1000mA5 mA31Negative PeakPeak magnitude of the negative portion of the HVI pulse signal0 to 1000mA5 mA41FrequencyFrequency of the HVI pulse train0 to 5Hz0.1 Hz51Total CurrentTotal RMS current seen by the VTI21 receiver0 to 1000mA5 mA62Average CurrentThe average RMS current of the positive and negative portion of the HVI pulse signal0 to 1000mA5 mA72Positive PeakPeak magnitude of the positive portion of the HVI pulse signal0 to 1000mA5 mA82Negative PeakPeak magnitude of the negative portion of the HVI pulse signal0 to 1000mA5 mA92FrequencyFrequency of the HVI pulse train0 to 5Hz0.1 Hz102Total CurrentTotal RMS current seen by the transducer.0 to 1000mA5 mA

...

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

Current

Frequency

RMS current observed on

Channel 1 Frequency Selected

0 to 2500

1700 to 2600

mA

Hz

5 mA

...

Slave Channel

VTI21 Input Channel

Quantity

Description

Typical Range

Units

Suggested AoC

11CH 1 FrequencyChannel 1 Frequency Selected1700 to 2600Hz121CH 1 Side Band RatioRatio of lower to upper frequency (0%=all lower, 100%=all upper)0 to 100%%531CH 1 Raw FrequencySimple Frequency Measurement (zero crossings)1600 to 2700Hz10041CH 1 Total CurrentTotal current in the UM71 band

1

2

2CH 2 CurrentRMS current observed on Channel 20 to 2500mA5 mA3NADerived CurrentRMS current derived for an unmonitored 3rd phase in a balanced three-phase system.0 to 2500mA5 mA4NACH1 Leads CH2Digital Output - TRUE if the waveform on CH1 is observed to lead that of CH2TRUE or FALSENANA5NACH1 Lags CH2Digital Output - TRUE if the waveform on CH1 is observed to lag that of CH2TRUE or FALSENANA

VTI21-ACS-020

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Slave Channel

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VTI21 Input Channel

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Quantity

...

Description

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Typical Range

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Units

...

Suggested AoC

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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

5

17

1

2

CH

1

2 current

1700Hz

2600Hz

Current measured at

1700Hz

2600Hz

0 to 5mA

µA

100

61CH 1 current 2000HzCurrent measured at 2000Hz0 to 5mAµA1007


18	2	CH 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

current 2300HzCurrent measured at 2300Hz

Frequency

Simple Frequency Measurement (zero crossings)

0 to

5mA

5000

µA

Hz

100

1

8

2

1

CH 1

current 2600HzCurrent measured at 2600Hz0 to 5mAµA1009

Total Current	Total current measured in the reed relay frequency range	0 to 5A	mA	50
3	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 321102CH 2 FrequencyChannel 1 Frequency Selected1700 to 2600Hz1112CH 2 Side Band RatioRatio of lower to upper frequency (0%=all lower, 100%=all upper)0 to 100%%5122CH 2 Raw FrequencySimple Frequency Measurement (zero crossings)1600 to 2700Hz100132CH 2 Total CurrentTotal current in the UM71 band0 to 5mAµA100142CH 2 current 1700HzCurrent measured at 1700Hz0 to 5mAµA100152CH 2 current 2000HzCurrent measured at 2000Hz0 to 5mAµA100162CH 2 current 2300HzCurrent measured at 2300Hz0 to 5mAµA100172CH 2 current 2600HzCurrent measured at 2600Hz0 to 5mAµA100182CH 2 Spectrogram or Gain

- 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.

1 to 321

VTI21-Reed

Slave Channel

VTI21 Input Channel

Quantity

Description

Typical Range

Units

Suggested AoC

11CH 1

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

1

CH

1

2 Total Current

Total current measured in the reed relay frequency range

0 to 5A

mA

50

3

14

1

2

CH

1

2 - channel 211

Total Current at 363Hz

0 to 5A

mA

50

4

15

1

2

CH

1

2 -

channel 212

Total Current

at 366Hz

0 to 5A

mA

50

5

16

1

2

CH

1

2 -

channel 213

Total Current

at 369Hz

0 to 5A

mA

50

6

17

1

2

CH

1

2 -

channel 214

Total Current

at 372Hz

0 to 5A

mA

50

7

18

1

2

CH

1

2 -

channel 215

Total Current

at 375Hz

0 to 5A

mA

50

8

19

1

2

CH

1

2 -

channel 216

Total Current

at 378Hz

0 to 5A

mA

50

9

20

1

2

CH

1

2 -

channel 217

Total Current

at 381Hz

0 to 5A

mA

50

10

21

1

2

CH

1

2 -

channel 218

Total Current

at 384Hz

0 to 5A

mA

50

11

22

1

2

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

Quantity

12

Units

2CH 2 FrequencySimple Frequency Measurement (zero crossings)0 to 5000

Change Threshold	4-20 mA	RS485
CH1_Aster	Hz	1

132CH 2 Total CurrentTotal current measured in the reed relay frequency range0 to 5AmA50142

CH 2 - channel 211

Total Current at 363Hz

0 to 5AmA50152

CH 2 - channel 212

Total Current at 366Hz

0 to 5AmA50162

CH 2 - channel 213

Total Current at 369Hz

0 to 5AmA50172

CH 2 - channel 214

Total Current at 372Hz

0 to 5AmA50182

CH 2 - channel 215

Total Current at 375Hz

0 to 5AmA50192

CH 2 - channel 216

Total Current at 378Hz

0 to 5AmA50202

CH 2 - channel 217

Total Current at 381Hz

0 to 5AmA50212

CH 2 - channel 218

Total Current at 384Hz

0 to 5AmA50222CH 2 - spectrogram / gainCapture 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


CH1_ICent	uA	50
CH1_Freq	Hz	1
CH1_ITot	uA	50
CH1_1700	uA	50
CH1_2000	uA	50
CH1_2300	uA	50
CH1_2600	uA	50
CH1_FFT		Not normally acquired
CH2_Aster	Hz	1
CH2_ICent	uA	50
CH2_Freq	Hz	1
CH2_ITot	uA	50
CH2_1700	uA	50
CH2_2000	uA	50
CH2_2300	uA	50
CH2_2600	uA	50
CH2_FFT		Not normally acquired

Versions Compared

Old Version 4

New Version 5

Key

RS485 Sensor Tables

VTI21-VT1

VTI21-TI21 / VTI21-FS25 / VTI21-FS26

4-20mA Sensor Tables

4-20mA Sensor Tables

RS485 Sensor Tables

VTI21-VT1

VTI21-TI21 / VTI21-FS25 / VTI21-FS26

VTI21-HVI

VTI21-ACS-

001

VTI21-ACS-020

VTI21-ACS-020