Chapter 3 - Main Unit; General - Veesta World V-RTU2000 Series Technical Information

Hide thumbs

Table Of Contents

Table of Contents

V-RTU2000 Series

Veesta - Remote Terminal Unit

Technical Specification Manual

Chapter 3 -

3.1

General

Main Unit

The main unit of V-RTU2000 Series is consisted of the followings:

 Backplane: As passive elements, it is buffering the path of power

supply, communications and Bus and with plugging slots for all

kinds of Circuit Cards. It is consisted of one power slot, one CPU

slot and several I/O slots. It is provide pluggable type terminal

blocks for external wiring connection. By characteristics, the

signals on the backplane can be divided into the followings:

• Power signal

• Control signal

• Communication signal

• Address signal

 CPU Card: It is designed in Intel CPU. Internally, it connects with

I/O Cards through RS-485 communication port by 62.5 kbps baud

rate; externally, it provides RS-232 communication port (9.6 kbps)

for linking with Test Set, also with RS-232/RS-485 communication

port (9.6 kbps) for linking with the outside equipment. By function,

the CPU Card provides two kinds of different functions. First one,

featuring as the Communication Server or Remote Terminal Unit

which providing Master CPU Card, IO CPU Cards and CM Cards,

CPU Cards to communicate with Master Station(s) and CM Card

to communicate with IEDs. Secondly, featuring as the IED, which

providing

CPU

communication port to communicate with the comm. server or

Master station, the other port to communicate with Power Meter

or IEDs.

 CM Card: Communication Module card, which designed as

communication module for V-RTU2000 Series. It is designed in

Intel 80C188EB-20 CPU. It provides either two RS-232 or two

RS-485 communication ports (9.6 kbps) for communication with

Power Meter or IEDs.

 Data Modem Card: is the abbreviation for ITU-T V.29, 9600bps,

which designed in with an intelligent modem. In the RTU system,

this card features as interface between CPU Card and Host

Computer. Providing the basic function as general modem, also

--- +5V, +24V, DGND

--- /PF, /RST

--- DATA, /DATA (RS-485)

--- Rack Address (RA0~RA3),

for CPU slot. Slot Address

(SA0~SA3), for I/O slot.

Card

and

I/O

Cards,