Chapter 9 - Analog Ac Input Unit; General; Aci Card - Veesta World V-RTU2000 Series Technical Information

V-RTU2000 Series
Veesta - Remote Terminal Unit
Technical Specification Manual
Chapter 9 -
9.1

General

9.2

ACI Card

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Analog AC Input Unit
The Analog AC Input Unit of V-RTU2000 Series is designed with two
modules name of ACI VR-2745 for measurement of independent
current input and model and ACV VR-2746 for measurement of
independent voltage AC signal input. The PT and CT of fields can be
connected directly to these cards.
The design concept of Model VR-2745 ACV card was based on
Microprocessor. It uses 16 bit A/D to design its current module cards
for voltage measurement of RTU. Its back side of 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 ACI Card Features:
 4 sets AC current input : 0-1A or 0-5A
 Each sampling cycle : 32 points
 True RMS converter
 Low importation burden
 Accuracy : ≦ 0.5% fs
 Field programmable CT ratio
 Instant maximum and minimum logger
 Event record : 32 events
 Data updating interval : 1 second
 Fault current detection (sample rate 1ms)
 Communication port : RS-485 + RS-232
 Completely modulated and plug-in type cards which is easy to
maintain

Chapter 9 - Analog AC Input Unit

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