Chapter 7 - Analog Input Unit; General; Ai Card - Veesta World V-RTU2000 Series Technical Information

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Table Of Contents

Table of Contents

V-RTU2000 Series

Veesta - Remote Terminal Unit

Technical Specification Manual

Chapter 7 -

7.1

General

7.2

AI Card

Analog Input Unit

The Analog Input Unit of V-RTU2000 Series comprises three card

types. Each AI cards board provides 4 Differential Channels

(CH1+/CH1- ~ CH4+/CH4-) and 2 Shielding Points (S1, S2). Listed

below is the card types provided by the V-RTU2000 Series:

 AI Card (+/-1mA): Analog Input Card, 4 Differential Channels /

Card, Input Range +/-1mA.

 AI Card (4~20mA): Analog Input Card, 4 Differential Channels /

Card, Input Range 4~20mA.

 AI Card (-5 ~ +5V): Analog Input Card, 4 Differential Channels /

Card, Input Range +/- 5VDC.

For application, AI Card is normally used to measure output signals

from power transducer of Watt, Var, Voltage, Current, Temperature,

Position, Resistance, as to monitor the operation status of power

system, including the measured values of current, temperature and

Tap position.

Analog Input Card is an intelligent IO Card, which is used to measure

the output values of power transducer as to monitor the status for

power system, including current, temperature and Tap position. It

contains CPU comply with its Firmware, it also provides interface and

converting circuit required for analog input. It connects to CPU Card

through LIOC RS-485 communication interface, the DATA & /DATA

Communication Signal is linked by the backplane without additional

wirings. The external connection contains 4 Differential Input

Channels (Ch1+/CH1- ~ CH4+/CH4-) and 2 Shielding (S1, S2),

which are transmitted through 96-Pin DIN Connector to 10-Pin

terminal on the backplane for actual application. In design, the

analog and digital circuits are isolated using differential input type to

provide stronger restraining power to press down the common mode

noise.