Voltage Tracking Unit
Device Description

VTU (Voltage Tracking Unit) is a generation digital input module that provides voltage tracking in single phase or three phase systems. Digital input module has network analyzer specification that provides 4 channel voltage and 3 channel current input on device. In addition to network analyzer and voltage tracking, VTU provides to monitoring of energy parameters of single phase or three phase information that connects.Logical 1 and 0 informations can be set with VTU Configuration Software which voltage range will work. At the same time, power parameter may also be observed which is calculated as real time.

  • Device Specifications
  • Technical Specifications
  • Input/Output
  • Power Measurement Specifications
Device Specifications
Supply Voltage Range9-18 VDC / 18-36 VDC
Nominal Supply Voltage12 VDC / 24 VDC
CPUARM Cortex-M4 32 Bit
Flash256 kB
RAM32 kB
Watchdog TimerSystem Reset / 5 sec
Power Consumption1.5W @ 24 V DC
Real Time ClockAvailable
ConfigurationInavitas VTU Configuration Software
Communication Specifications
Communication ProtocolsModbus-RTU (Slave) g/n
Serial InterfacesRS-485 (Isolated), Micro USB Type 2.0
Serial Communication Speed1200bps – 115200bps
Connection Type3-Wired (A, B, GND), Semi Duplex
Data Type8 Bit Data, No Parity, 1 Bit Stop
Insulation2.5 kVAC RMS 1 Minute
Usb Data Transfer Speed480 Mbit/s
Digital Input Specifications
Voltage Measurement Range0 – 275 VAC,RMS
Number of Digital Channels18 Voltage Inputs
Logical “1” ValueProgrammable, Default : ≥ 150VAC,RMS ≤ 275 VAC,RMS
Logical “0” ValueProgrammable, Default : ≤ 150VAC,RMS
Input Current1.5 mA / Channel
Input FilterProgrammable, Default : 100ms
Input Change Counter32 Bit
Power Measurement Specifications
Voltage Measurement Range0 – 275 VAC,RMS (L – N), 0 – 500 VAC,RMS (L – L)
Current Measurement Range1 – 4000 AAC,RMS (Split Type)
Frequency50 / 60 Hz ±5%
Voltage Channels3P + N (3 Phase Voltage and Neutral)
Current Channels3 Current Inputs
Sampling Frequency128 Sample / Cycle
Voltage Accuracy±0,5%
Current Accuracy±1%
Active Energy AccuracyIEC 62053-22 Class 0.5S
Accuracy ClassIEC 61000-4-30 Class S

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