Veesta World V-RTU2000 Series Manual

Veesta World Co
Technical Information
V-RTU2000 Series
Technical Specification
Manual
Author: Veesta World Co., Engineering Department

TRADEMARKS
VEESTA and VEESTA WORLD are trademarks of Veesta World Co. Iran
V-RTU2000 is trademarks of RTU system of VEESTA WORLD Co.
NOTICE
The information in this document is subject to change without notice and should not
be construed as a commitment by VEESTA WORLD Co. Veesta World Co assumes
no responsibility for any errors that may appear in this document.
In no event shall Veesta World Co be liable for direct, indirect, special, incidental or
consequential damages of any nature or kind arising from the use of this document,
nor shall Veesta World Co be liable for incidental or consequential damages arising
from use of any software or hardware described in this document.
This document and parts thereof must not be reproduced or copied without
Veesta World Co’s written permission and the contents thereof must not be imparted
to a third party nor be used for any unauthorized purpose.

V-RTU2000 Series Document History
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Technical Specification Manual
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DOCUMENT HISTORY
Version Date Comment
1.0 2009/09/01 First issue
1.1 2009/10/01 Added some picture of cards
1.2 2009/11/05 Added sub rack dimensions
1.3 2010/04/01 Revised Module list
1.4 2010/07/01 DNP3.0 Profile
1.5 2010/12/01 De-bounce and Chatter Filter
1.6 2010/12/05 List Type Test Standards
1.7 2010/12/20 Adding VR-2736A, DO Card type with MEX relay.
1.8 2011/01/20 New modules and specifications
1.9 2012/08/08 Adding VR-2425,VR-2426, GPRS/3G modem
2.0 2013/11/10 Adding some new wiring diagrams

V-RTU2000 Series Table of Content
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Technical Specification Manual
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TABLE OF CONTENT
Chapter 1 - Introduction ........................................................................9
1.1 General Information...............................................................9
1.2 Veesta World Co ...................................................................9
1.3 Copyrights ...........................................................................10
Chapter 2 - System Overview .............................................................11
2.1 Overview .............................................................................11
2.1.1 Distributed Remote Terminal Unit (RTU) .................11
2.1.2 Intelligent Electronic Devices (IED)..........................14
2.2 Summary of Functions.........................................................15
2.2.1 Data Acquisition Processing ....................................15
2.2.2 Control Output..........................................................17
2.2.3 Communication Function .........................................19
2.2.4 Self-Diagnostic Function ..........................................19
2.2.5 Programmable Algorithm Function...........................19
2.3 Hardware Structure .............................................................20
2.3.1 Power Supply Unit ...................................................20
2.3.2 Main Unit..................................................................20
2.3.3 I/O Interface Unit......................................................21
2.3.4 Universal Intelligent Power Meter ACUP .................21
2.4 V-RTU2000 Series Card & Modules List .............................22
2.5 V-RTU2000 Series Hardware and Software Training..........24
2.5.1 Curriculum Schedule Syllabus .................................24
2.6 Standards (Type Test).........................................................25
2.6.1 Power Supply Performance .....................................25
2.6.2 Digital Input Performance ........................................25
2.6.3 Analog Input Performance .......................................25
2.6.4 Current & Voltage Input Performance ......................25
2.6.5 Digital Output Performance......................................25
2.6.6 Electrical Insulation ..................................................25
2.6.7 Electromagnetic Compatibility (EMC) ......................26
2.6.8 Environment Standards ...........................................26
2.6.9 Mechanical Standards .............................................26
Chapter 3 - Main Unit...........................................................................27
3.1 General................................................................................27
3.2 Backplane............................................................................28

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Technical Specification Manual
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3.2.1 Detailed Circuit Description......................................29
3.2.2 Rack Address Signal................................................30
3.2.3 Slot Address Signal..................................................31
3.2.4 Local I/O Cards (LIOC) Communication Signal........31
3.2.5 Power Fail Control Signal ........................................31
3.2.6 Reset Control Signal ................................................32
3.2.7 DC 5V Power Signal ................................................32
3.2.8 DC 24V Power Signal ..............................................32
3.2.9 Relationship between DIN Connector & Terminals..32
3.3 CPU Card ............................................................................33
3.3.1 VR-2717A Specifications .........................................33
3.4 Modem Card........................................................................34
3.4.1 VR-2424 Data Modem Specifications ......................34
3.4.2 VR-2444 Voice & Data Modem Specifications.........35
3.4.3 VR-2444T Telephony Interface Specifications.........36
3.4.4 VR-2425 GPRS Modem Specifications....................36
3.4.5 VR-2426 GPRS / 3G Modem Specifications............37
Chapter 4 - Power Unit ........................................................................39
4.1 General................................................................................39
4.2 DC 24V/DC 5V & 24V L-PS Card........................................40
4.2.1 VR-2707B Specifications .........................................40
4.3 AC 220V/DC 5V & 24V H-PS Card .....................................41
4.3.1 VR-2708B Specifications .........................................41
Chapter 5 - Digital Input Unit ..............................................................42
5.1 General................................................................................42
5.2 DI Card................................................................................42
5.2.1 VR-2722A Specifications .........................................43
5.2.2 VR-2723A Specifications .........................................44
Chapter 6 - Digital Output Unit ...........................................................45
6.1 General................................................................................45
6.2 DO Card ..............................................................................46
6.2.1 VR-2736 Specifications............................................46
6.3 HDO Card............................................................................47
6.3.1 VR-2735 / VR-2737 Specifications...........................47
Chapter 7 - Analog Input Unit .............................................................48
7.1 General................................................................................48
7.2 AI Card ................................................................................48
7.2.1 VR-2741 / VR-2742 / VR-2743 Specifications .........49
Chapter 8 - Analog Output Unit ..........................................................50
8.1 General................................................................................50
8.2 AO Card ..............................................................................50
8.2.1 VR-2751 / VR-2752 Specifications...........................51

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Chapter 9 - Analog AC Input Unit.......................................................52
9.1 General................................................................................52
9.2 ACI Card..............................................................................52
9.2.1 VR-2745 Specifications............................................53
9.3 ACV Card ............................................................................54
9.3.1 VR-2746 Specifications............................................55
Chapter 10 - Analog AC Power Input Unit...........................................56
10.1 General................................................................................56
10.2 ACPM Card .........................................................................56
10.2.1 VR-2749A Specifications .......................................57
10.2.2 Fault Current Detection Function ...........................58
Chapter 11 - Universal Intelligent AC Power Meter Unit....................59
11.1 General................................................................................59
11.2 ACUP Card..........................................................................59
11.2.1 VR-2760 Specifications..........................................61
11.2.2 Fault Current Detection Function ...........................63
Chapter 12 - Communication Protocols ..............................................65
12.1 General................................................................................65
12.2 DNP3. Profile.......................................................................65
Chapter 13 - Wiring & Cabling ..............................................................71
13.1 General................................................................................71
13.2 Backplane Terminal Wiring..................................................71
13.3 CPU Card (Master and IO) Wiring.......................................72
13.4 Communication Module (CM) Card Wiring ..........................73
13.5 Power Supply (PS) Card Wiring ..........................................74
13.6 Digital Input (DI) Card Wiring...............................................76
13.7 Digital Output (DO) Card Wiring ..........................................77
13.8 Digital Output Select/Execute (DOH) Card Wiring...............78
13.9 Analog DC Input (AI) Card Wiring .......................................79
13.10 Analog AC Current Input (ACI) Card Wiring ........................80
13.11 Analog AC Voltage Input (ACV) Card Wiring.......................81
13.12 Analog Output (AO) Card Wiring .........................................83
13.13 Intelligent Power Meter Input (ACUP) Card Wiring..............84
Chapter 14 - Dimensions.......................................................................86
14.1 General................................................................................86
14.2 VR-2101A Sub rack.............................................................86
14.3 VR-2101C Sub rack ............................................................87
14.4 VR-2102 Sub rack ...............................................................88
14.5 VR-2103 Sub rack ...............................................................89

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Technical Specification Manual
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TABLE OF FIGURES
Figure 1-1: Veesta World Co Logo and sign..............................................................10
Figure 2-1: V-RTU2000 Series as Distributed RTU Structure Diagram.....................12
Figure 2-2: V-RTU2000 Series as Small Scale RTU Structure Diagram ...................13
Figure 2-3: V-RTU2000 Series as IED Structure Diagram ........................................14
Figure 2-4: V-RTU2000 De-bounce Filter Diagram ...................................................16
Figure 2-5: V-RTU2000 Chatter Filter Diagram .........................................................17
Figure 3-1: V-RTU2000 Series Back-plane Block Diagram.......................................30
Figure 13-1: CPU Card Wiring & Cabling Diagram....................................................72
Figure 13-2: CM Card Wiring & Cabling Diagram......................................................73
Figure 13-3: PS Card Wiring & Cabling Diagram ......................................................74
Figure 13-4: DI Card Wiring & Cabling Diagram........................................................76
Figure 13-5: DO Card Wiring & Cabling Diagram......................................................77
Figure 13-6: HDO Card Wiring & Cabling Diagram ...................................................78
Figure 13-7: AI Card Wiring & Cabling Diagram........................................................79
Figure 13-8: ACI Card Wiring & Cabling Diagram .....................................................80
Figure 13-9: ACV Card Wiring & Cabling Diagram....................................................81
Figure 13-10: AO Card Wiring & Cabling Diagram ....................................................83
Figure 13-11: ACUP Card Wiring & Cabling Diagram ...............................................84
Figure 13-12: ACUP Card Panel Mount version, Size & Dimensions........................84
Figure 13-13: ACUP Card Panel Mount Cut-out diemsnions.....................................85
Figure 13-14: ACUP Cuircuit Connection Diagram ...................................................85
Figure 14-1: VR-2101A Sub Rack detail Dimension..................................................86
Figure 14-2: VR-2101C Sub Rack detail Dimension .................................................87
Figure 14-3: VR-2102 Sub Rack detail Dimension ....................................................88
Figure 14-4: VR-2103 Sub Rack detail Dimension ....................................................89

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INDEX OF TABELS
Table 2-1: V-RTU2000 Series Cards & Modules.......................................................22
Table 2-2: V-RTU2000 Series Training Syllabus.......................................................24
Table 11-1: VR-2760 Programmable measurements/accuracy/display readouts......63
Table 12-1: V-RTU2000, DNP3.0 Device Profile Document......................................65
Table 12-2: V-RTU2000, DNP3.0 Interoperability Table............................................67
Table 13-1: V-RTU2000 Series as Communication Server Backplane Wiring ..........71
Table 13-2: V-RTU2000 Series as RTU & IED Backplane Wiring .............................71

V-RTU2000 Series Chapter 1 - Introduction
Veesta - Remote Terminal Unit
Technical Specification Manual
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Chapter 1 - Introduction
1.1 General Information
This is technical information of design of V-RTU2000 Series, the
Remote Terminal Units from Veesta World Company. This document
helps you to find about how V-RTU2000 Series works and designed
for your purpose.
V-RTU2000 Series of RTU system adopted for from very small RTU
from that can be used in as Feeder Terminal Unit up to very large
scale RTU for Generation and Transmission High Voltage
Substations.
Veesta World Co. from Iran associated with you! In planning,
designing, manufacturing, supply, installation, commissioning and
acceptance test for the Remote Terminal Units in your projects.
Veesta World Company will render full support and services to its
customer to enable them to deliver first class services to the Power
Automation Market.
1.2 Veesta World Co
Veesta World Co is a leading company in
automation field in Iran and specialized in
design and installation of IT Network of wide
area and local area, Automation control units, control rooms, DCS
design, PLC and SCADA application installation and system
integration. The main advantage of Veesta World's products is
complying international standards and do customs basic design.
Veesta World Co is a dynamic company located in the Tehran, IRAN,
whose main commitment is the customer’s satisfaction. Business
vision and its future evolution together with the proper combination of
new and existing technologies are the main aspects considered in
the solutions proposed by Veesta World Co. Owing to this, key
issues like Scalability, the Return of Investment or the Total Cost of
Ownership are carefully considered. Consequently, the solutions
offered by Veesta World Co are able to cope with the requirements of
a sustainable growth. Veesta World Co is a service-oriented
company and the customer perspective is its action guide. An added
value of the offer is the evaluation and Management of the risk. This
issue is getting a major relevance in the changing environment in

V-RTU2000 Series Chapter 1 - Introduction
Veesta - Remote Terminal Unit
Technical Specification Manual
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which new technologies have to be applied, particularly when
profitability is a major concern.
The objective of Veesta World Co is focused on the creation of value
for the customer through the proper business strategy alignment and
the right combination of technologies. These principles, developed
under the Total Quality Management practice, allow Veesta World Co
to offer, in a seamless approach, consultancy, engineering and
training services.
The founders of Veesta World Co are professionals with a large
experience in the Telecommunication and Networking and Industrial
fields.
Veesta World Co is formed by a balanced team of professionals that
gather knowledge in a wide range of technologies and specific know-
how on how to apply these technologies in mission-critical control
networks.
1.3 Copyrights
All of documents and materials in related to this document and this
document are copyrights of Veesta World Co and it is not permitted
to use or transfer the contents to any other parties.
The Veesta World Co logo is registered trademark of Veesta World
Co and its properties.
Figure 1-1: Veesta World Co Logo and sign

V-RTU2000 Series Chapter 2 - System Overview
Veesta - Remote Terminal Unit
Technical Specification Manual
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Chapter 2 - System Overview
2.1 Overview
The V-RTU2000 series (Veesta Remote Terminal Unit) is a
distributive Data Acquisition and Control System based on
microprocessor. In common SCADA (Supervisory Control and Data
Acquisition) System, it performs the work of the Terminal processing
unit in most utility stations. RTU acquires station data, both of analog
and digital signals with information management and DTU also
meets the command from host in master station : to transmit back the
acquired data ; to perform the function "check before execution" for
station facilities to ensure a safe and reliable execution in system
control.
2.1.1 Distributed Remote Terminal Unit (RTU)
To achieve an idea RTU design, V-RTU2000 series is fully
modularized in all I/O units, intelligent processing in system operation
and powerful in communication ability. RTU design endeavor to
pursue long-term stability, high reliability, convenience in
maintenance and wiring connection, flexible in extension to be an
aesthetic product as a well-being quality unit. V-RTU2000 provides
flexible, cost effective answers to many challenges that face the
engineering, operations, and maintenance departments of today’s
power utility.
The V-RTU2000 series offers a single RTU family meeting the entire
range of requirements, from small distribution and cogeneration sites
to large substations and generating stations, using the same
components in a modular, building block approach. The V-RTU2000
Series introduces an open architecture permitting the addition of new
processing modules, each linked by fully protected high-speed I/O
LAN (Local Area Network). Nothing becomes obsolete in the course
of expanding a V-RTU2000 from the smallest to the largest, most
complex configuration. Please refer to Figure 2-1 as reference.
The V-RTU2000 Series including two other key functional
equipments of the Communication Server and the Intelligent
Electronic Device equipments as Communication Server and IED.

V-RTU2000 Series Chapter 2 - System Overview
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Technical Specification Manual
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Figure 2-1: V-RTU2000 Series as Distributed RTU Structure Diagram
Power
RS-232/RS-485
Master Station #2
DNP 3.0 or
IEC-870-5
and etc
Protocol Test Set
Back-plane
+5V
Com Bus
Com Port
#
1
PS Card
Com Port
#
m
RS-232
Powe
Test Set
Back-plane
+5V
RS-485
CPU
PS Card
A
O
Card
DO/HDO
Card
D
I Card
A
I
Card
ACI/ACV
Card
ACP/ACW
Card
RS
-
232
IEDs
ACPM
Card
Powe
Test Set
Back-plane
+5V
RS-485
CPU
PS Card
A
O
Card
DO/HDO
Card
D
I Card
A
I
Card
ACI/ACV
Card
ACP/ACW
Card
RS-485 / 2-Wire
RS
-
232
IEDs
ACPM
Card
Com Port
#
n
Main
Board
Com Port
#
k
Com Port
#
j
Master Station #1
DNP 3.0 or
IEC-870-5
and etc
Protocol
Master Station #n
DNP 3.0 or
IEC-870-5
and etc
Protocol
RS-232 Ethernet
VC-2DCU
R
TU
R
TU
Sub Rack 21
RS-232
Sub Rack 22
R
TU
Sub Rack 2n
R
TU
Sub Rack 12
R
TU
Sub Rack 1n
R
TU
Sub Rack 11
RS-232
Power Meter
Power Transducer
Digital Relay
RS232 RS232
RS
-
485
RS-485
RS-485
Power Meter
Power Transducer
Digital Relay
RS-232 Point to point links
RS-232
Com Port
#
i
RS-485

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Technical Specification Manual
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Figure 2-2: V-RTU2000 Series as Small Scale RTU Structure Diagram
CPU
Card
PS
Card
AO Card
DO/HDO
Card
DI Card
AI Card
ACI/ACV
Card
ACP/W
Card
ACPM
Card
Back-plane
RS-485
RS-485 / 2-Wire
+5V
RS-232 RS-232
Test Set
Master Station
DNP3.0 or IEC-870-5 and etc
Protocol
Field Power
CPU
Card
PS
Card
AO Card
DO/HDO
Card
DI Card
AI Card
ACI/ACV
Card
ACP/W
Card
ACUP
Card
Back-plane
RS-485
RS
-
485 / 2
-
Wire
+5V
RS-232 RS-485
Test Set
Power
Sub Rack 1
CPU
Card
PS
Card
AO Card
DO/HDO
Card
DI Card
AI Card
ACI/ACV
Card
ACP/W
Card
ACUP
Card
Back-plane
RS-485
+5V
RS-232 RS-485
Test Set
Power
Sub Rack 2
Sub Rack
3
Power
M
eter
RS-485 / 2-Wire

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Technical Specification Manual
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2.1.2 Intelligent Electronic Devices (IED)
Show in Figure 2-3 is of the IED structure diagram, using V-RTU2000
as well as the IED equipment. There are two independent
communication channels are provided by V-RTU2000 CPU Card, of
which, one links to the host computer. The other one links to the
Power Meter or IEDs for obtaining I/O information for such equipment
and also transferring the Output control command. In addition, the
V-RTU2000 also provide I/O cards (AI, DI, AO, DO and etc.) to
collect the field information and also carry out the Output of control
command.
Figure 2-3: V-RTU2000 Series as IED Structure Diagram
CPU
Card
PS
Card
AO Card
DO/HDO
Card
DI Card AI Card ACI/ACV
Card
ACPW
Card
ACPM
Card
External
IEDs
Back-plane
RS-485
RS-485 / 2-Wire
Modbus RTU Protocol
+5V
RS-232
Main
tenance Port
RS-485/
RS-232/
Ethernet
Master Device
DNP 3.0 or ModBus or IEC60870-5-101
RTU Protocol
Field Power

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Technical Specification Manual
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2.2 Summary of Functions
V-RTU2000 Series is generally installed at on-site power station,
applied to signals monitoring and control performance. It is designed
in multi-processor technique. Each I/O Card has its own processor
which is responsible for the basic data acquisition function. The basic
functions are as follows.
2.2.1 Data Acquisition Processing
V-RTU2000 Series acquires digital and analog signal from station
and stores it in RTU memory. On the other band, RTU accepts host
command to reflect and transmit back the required data to control
center.
2.2.1.1 Analog Data Input
Measured Values, generally to receive signals from power
transducers (Watt / Var / Voltage / Current / Temperature / Position /
Resistance / etc), this is meant; RTU is to gather all physical signals
of main facilities in station.
2.2.1.2 Accumulated Data Input
Energy Counters, accumulation and processing of pulses from
external energy measurement devices are supported. A 16-Bit
value is set aside in the local memory for each Pulse Accumulator
point. The Pulse Accumulator will be incremented one count for each
cycle of the input.
2.2.1.3 Digital Data Input
Indications, Status of facilities and the status of Momentary Change
Detection (MCD) are acquired. Four basic indication types are
supported: Single indication Double indication, Sequence Capturing,
and Multiple Change detection. The de-bounce time for DC Digital
Input Points can be 1 ms to 250 ms adjustable. The de-bounce time
for AC Digital Input Points can be 48 ms to 250 ms adjustable.
 Single indication (1-Bit Status): involve only a single monitored
external point and hence, have only two states: 0 or 1.
 Double Indication (2-Bit Status): involve the monitoring of two
physical external points and hence, can provide four states: 0/0,
0/1, 1/0, 1/1.

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 Sequence capturing (1-Bit MCD): is optimized for a multiple
change detects technique which ensures that the critical
information is not lost, but avoids sacrificing the efficiency of the
communications process. This is accomplished using only a
single bit for each monitored indication point in the protocol.
2.2.1.4 De-bounce filter
De-bouncing used to verify that a digital input point has actually
changed state.
Figure 2-4: V-RTU2000 De-bounce Filter Diagram
2.2.1.5 Chatter Filter
A facility that is used to disable a digital input point if the number of
state changes of that point is excessively high during a defined time
interval.
Chatter Times (changes): The maximum allowed number of state
transitions that can occur within a filter base (Times Base) period. If
the number of state transitions during a filter period equals or
exceeds the maximum allowed number of state transitions, chatter
filter will turn ON and any further transitions will be ignored for the
duration of the “lock-out” period.
Lock Out Time: The minimum number of filter base periods (Times
base) during which the chatter filter will remain ON. The chatter filter
can proceed from ON to OFF only if no state transitions are detected
during the entire lock-out period.
Signal
Signal after
debounce filter
Time-Stamp of State change
State change recognition
Contact bounce
De-bouncing Filter time

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Technical Specification Manual
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Example: Chatter Times (changes) 5, Lock-Out Time 1s.
Figure 2-5: V-RTU2000 Chatter Filter Diagram
2.2.1.6 Sequence of Event Report
In order to monitor the status and sequence, changed of main
equipments, RTU provides the SOE function (Sequence Of Event).
An event is defined as a single change of state. Each time an event
is detected, RTU will time-tag the event, and store a description of
the event and the time-tag in a first in first out (FIFO) buffer. There is
one 1024 events buffer in V-RTU2000 Series.
RTU will time-tag the first change of state, rather than the end of de-
bounce period, and the de-bounce time for all SOE points can be
1ms to 250ms adjustable. The resolution is one millisecond. The
time-tag recorded with each event is generated from a clock internal
to the V-RTU2000 Series. The clock is 1 PPM accuracy TCXO.
V-RTU2000 Series have the capability to synchronize its internal
clock with a system clock located at the master station. If the
synchronization period is no more than 15 minutes, it can guarantee
the time accuracy of SOE is within +/- 4ms to system clock (in Master
Station).
2.2.2 Control Output
Two types of control command can be transmitted from the Master
Station to devices in the Power System via the V-RTU2000 Series.
One is Trip/Close command, the other is Direct Set-point command.
Time base period Time base period Lock-out period
Signal after
debounce level
debounce time
Filter’s state
Signal after
chatter filter
Chatter filter is
ON Chatter filter is
OFF
1 2
ON
3 4 5
OFF
No transitions during
lock-out period
No changes Lock-
out period
No Transitions >=5

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Technical Specification Manual
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2.2.2.1 Trip/Close Command
There are two types of control output using Trip/Close command, one
is ON/OFF operation output to control CBs, ABSs; the other is
Regulation operation output (raise/lower) to control the position of
transformer taps. Two distinct types of Trip/Close commands are
supported:
 Execute Immediate Command: Direct Trip/Close Command, are
executed as a single command message, and transmitted to the
addressed RTU.
 Select Before Operate (SBO) Command: Select Trip/Close
Command & Operate Command, are executed as two distinct
commands to the addressed RTU; a select command followed by
an execute command. The SBO controls are used when secure
operation is required such as the Trip and Close operations of
Power Circuit Breakers. RTU reset its control logic if the Operate
Command is not received within the User defined time period
maximum 60 sec, initially 20 sec, of the command message. The
operating sequences for SBO command are:
1. After received the Select Trip/Close Command, the RTU
initialize its control logic, check and verify its control circuit,
reassemble the command message, then transmit the
reassembled message to the Master Station.
2. If the Operate Command is received within the user defined
time period and last command is Select Trip/Close Command,
the RTU will operate the control point.
The result of Trip/Close command is the output of a pulse of fixed
duration (determined by the Database Configuration) at the
specifically addressed Digital Output (DO) point. Only one point can
be controlled at a time.
2.2.2.2 Set-point Command
There are two types of control output using Direct Set-point
command, one is Digital Direct Set-point, and the other is Analog
Direct Set-point.
 Digital Direct Set-point Command: Raise/Lower command, can
cause the addressed Digital Output (DO) point(s) to perform the
Pulse Width control output for a Generator Controller. The time
duration of output pulse is specified in the command message
from Master Station. Multiple points can be controlled
simultaneously.
 Analog Direct Set-point Command: cause the addressed
Analog Output (AO) point to perform a current or voltage output
for a Generator Controller. The output value is specified in the
command message from Master Station.

V-RTU2000 Series Chapter 2 - System Overview
Veesta - Remote Terminal Unit
Technical Specification Manual
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2.2.3 Communication Function
The communication function of V-RTU2000 Series can be divided
into Internal Communication and External Communication.
 Internal Communication: Means pointing to the inside
communication between CPU Card and I/O Cards, which is
linking with RS-485 interface, and using the Backplane
connecting card without additional wires.
 External Communication: Providing RS-232 or RS-485 two
communication channels, supporting the multi-communication
protocol to communication with external side. The supporting
protocols are listed as below:
1. SCADA Master: DNP3.0, IEC870-5-101.
2. RTU Sub-Master: ModBus RTU, DNP3.0, IEC870-5.
3. IED: ModBus RTU, DNP3.0.
4. User Specific Protocols: Other protocols can be implement
quickly in the firmware of V-RTU2000 Series by upon request.
2.2.4 Self-Diagnostic Function
V-RTU2000 Series has its well-equipped ability for self-diagnostic
function. Every abnormal status of RTU is recorded down as System
Event, or indicated by LED excitation on the panel. The System
Event Record can be retrieval by Test Set and store in its hard disk,
which very easy to find the fault portion in maintenance.
2.2.5 Programmable Algorithm Function
The V-RTU2000 Series have the capability of user definable
“Sequential Algorithm” running in it. The “Sequential Algorithm” within
a RTU operates on and can communicate through a common
variable data base which consists of analog inputs, digital inputs,
accumulator inputs, pseudo points, alarm (system) status, digital
output, and system clock.
The V-RTU2000 Series “Sequential Algorithm” programming is
based on the ladder diagram (V-RTU2000 Ladder). The circuit is
constructed of familiar contacts and coils on the rugs of the ladder.
Pages of circuit make it easy to find your way through a program.
The “V-RTU2000 Ladder Development Package“ running in IBM
compatible Personal Computer (PC) can provide the environment for
Sequential Algorithm Development. For detail information about “V-
RTU2000 Ladder“ please refer to “V-RTU2000 Ladder “ manual.

V-RTU2000 Series Chapter 2 - System Overview
Veesta - Remote Terminal Unit
Technical Specification Manual
Page 20 of 90
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2.3 Hardware Structure
V-RTU2000 Series hardware structure is shown in Figure 2-3,
designed as a Plug-In Type and set up in 19” Rack/Module
enclosure. The ideal plug-in type configuration provides a very useful
structure in maintenance. The size of Cards is following the Euro-
Card standard, 100mm x 160mm for Card. In according to operation
function, RTU hardware is for four main units.
2.3.1 Power Supply Unit
The power supply of V-RTU2000 Series contains the following cards:
2.3.1.1 DC 24V/DC 5V & 24V PS Card
Power supply card, designed in DC 24V~75V input and DC 5V
(10W), DC 24V (3W) output. Connecting with the backplane is linking
with 48-pin DIN connector, which provides 5V working power supply
for the RTU and 24V driving power supply for DO/HDO Card.
2.3.1.2 AC 220V/DC 5V & 24V PS Card
Power supply card designed in AC 85V~265V or DC 65V~375V input
and with DC 5V (10W), DC 24V (3W) output. Connecting with the
backplane is linking with 48-pin DIN connector, which provides 5V
working power supply for the DTU and 24V driving power supply for
DO/HDO Card.
2.3.2 Main Unit
The main unit of V-RTU2000 Series consists of 1 Backplane and 1
Master CPU Card; if necessary several IO CPU Cards and several
CM Cards.
2.3.2.1 Backplane
As a passive element, it is buffering the path of power supply,
communications 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 wire
connection.
2.3.2.2 CPU Card / CM Card
Use Intel, 16-bit high speed microprocessor, with two isolated RS-
232/485 ports for host communication, one RS-485 port for local IO
communication, and one isolated RS-232 port for Test Set and one
Ethernet 10/100Mbs at front panel.