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VTi21 Specifications

Owned by Mark Beeson (Deactivated)
Last updated: Nov 18, 2021

Kit Contents

ItemQtyNotes
AC Current Transducer2*

Transducers feature 2.5m tail cable - bare ends

Specification dependant on application - see below

VTI21 Smart Sensor1Main transducer body
2-Way 3.81mm Plug Connector5For all transducer connections
M3 Grub Screw2For securing current transducers to VTI21 chassis
M5 Hex Bolt2For general panel mounting
M5 Nut2

For general panel mounting

M5 Machine Screw2For BR930/Q Style Bracket Mounting
No.8 Wood Screw2For Backboard mounting

*VTI21-TI21 variants presently only feature 1 x transducer


Current Transducers (VTI21-ASTER, VTI21-UM71)



ModelMagnelab SCT-0400-001-40K
Output11.25 V per Amp
Accuracy<10%
Bandwidth1kHz to 25kHz
Phase ErrorUnspecified

Current Transducers (VTI21-VT1, VTI21-TI21-RX, VTI21-FS25, VTI21-FS26, VTI21-REED, VTI21-RFDM)



ModelMagnelab SCT-0400-001-NCAP
Output333mV per Amp
Accuracy<1%
Bandwidth5Hz to 25kHz
Phase Error<2 Degrees (Compensated by VTI21)

 Current Transducers (VTI21-HVI, VTI21-TI21-TX-LP)



ModelMagnelab SCT-0400-005
Output66.6 mV per Amp
Accuracy<1%
Bandwidth5Hz to 25kHz
Phase Error<2 Degrees (Compensated by VTI21)

Current Transducers (VTI21-ACS)



ModelMagnelab SCT-0400-010
Output33.3mV per Amp
Accuracy<1%
Bandwidth5Hz to 25kHz
Phase Error<2 Degrees (Compensated by VTI21)

Current Transducers (VTI21-TI21-TX)



ModelMagnelab SCT-0400-025
Output13.3mV per Amp
Accuracy<1%
Bandwidth5Hz to 25kHz
Phase Error<2 Degrees (Compensated by VTI21)

VTI21-Electrical



Analogue Inputs
Bandwidth20kHz
Range+/-1.25V Differential Input
Resolution

from 74μV to 2.4mV

(Inputs feature programmable Gain)

Accuracy

1% - SCT-0400-001-NCAP, SCT-0400-010, SCT-0400-005, SCT-0400-025

10% - SCT-0400-001-40K

Analogue Output
Bandwidth500 Hz
Range0-20mA Current Loop Output
Resolution19.5μA
Accuracy<1%
Serial Output
Physical Layer

EIA RS485

Baud Rate

115,200 bps
Protocol LayerMPEC Raildaq
Power Supply
Voltage12V to 24V DC
Power Consumption

12V 4-20mA Mode: 0.7W

12V RS485 Mode: 0.5W

24V 4-20mA Mode: 1.1W

24V RS485 Mode: 0.8W

VTI21 - Mechanical

Environmental Ratings
IP Rating4X
IK Rating06
Temperature Range-25 to +85 °C


General Arrangement Drawing: