V-RTU2000 Series
Chapter 10 - Analog AC Power Input Unit
Veesta - Remote Terminal Unit
Technical Specification Manual
Page 56 of 90
All rights reserved. Passing on and copying of this document, use and communication of its contents not permitted without written authorization.
Chapter 10 - Analog AC Power Input Unit
10.1 General
The Analog AC Power Input Unit of V-RTU2000 Series is designed
with modules named ACPM VR-2749 models.
10.2 ACPM Card
The design concept of V-RTU2000 Series ACPM Model VR-2749A
card was based on Microprocessor. It uses 12 bit A/D to current,
Watt and etc module cards for power related parameters
measurement of RTU. Its back side of RS-485 communication port is
using the protocol of RTU Local I/O, while the frond RS-232
communication port is for maintenance only. And this RS-232 port is
easy accessed and programmed by PC Tool to setup the parameters
and records.
The ACPM Card Features:
3-phase current input : 1A or 5A
3-phase voltage source input
True RMS conversion
For power related parameters
32 sample point per cycle
Field programmable PT/CT ratio
Fault current detection
Voltage synchronism check
Harmonics analysis up to 15th
Data updating interval : 1 second
Communication port : RS-485 + RS-232
Completely modulated and plug-in type cards which is easy to
maintain