VTU

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
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