S203TA-D Advanced Three Phase Network Analyzer with Display

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Specifications

• Model: S203TA-D
• Communication Port: RS485, USB
• Voltage Input: Up to 600 Vac, frequency 50 or 60 Hz
• Current Input: Rated range 5 A, Max Crest Factor 3
• Network Frequency: 50 or 60 Hz
• Voltmeter Precision: 0.2%
• Amperometer Precision: 0.2%
• Wattmeter Precision: 0.2%
• Analog Output: 0-10 Vdc, 0-5 Vdc, 0-20 mA, 4-20 mA
• Installation Category: III (up to 300 V), II (up to 600 V)
• Temperature Range: 30-90%
• Storage Temperature: International protection

Product Usage Instructions

Installation

1. Ensure the power source meets the requirements specified in
the manual.

2. Connect the voltage and current inputs to the appropriate
terminals with correct polarity.

3. Secure the connections using screw terminals with the
specified pitch.

Data Communication Setup

1. Configure the communication port settings as follows:

• Baud Rate: 1200-115200 baud
• Protocol: Modbus RTU

Analog Output Configuration

1. Set the desired output range (0-10 Vdc, 0-5 Vdc, 0-20 mA, or
4-20 mA) based on your requirements.

2. Ensure the load resistance is within the specified limits for
accurate output.

Frequently Asked Questions

Q: Can the S203TA-D measure single-phase electrical

quantities?

A: Yes, the instrument can measure single-phase electrical
quantities in addition to three-phase measurements.

Q: What is the communication protocol supported by the

device?

A: The device supports Modbus RTU protocol over RS485
communication port.

Q: How do I ensure accurate measurements with the

S203TA-D?

A: Make sure the cable length is compatible with the current
transformer and that the total resistance meets the specified
criteria.

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S SENECA

SSeerriiee ZZ–PPCC

EN

SS220033TTAA–DD
Advanced Three-phase

Network Analyzer with display

Installation Manual
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SENECA s.r.l. Via Austria, 26 ­ 35127 ­ PADOVA ­ ITALY Tel. +39.049.8705355 – 8705359 – Fax +39.049.8706287 For manual and configuration softwares, please see: www.seneca.it

This document is property of SENECA srl. Duplication and reproduction are forbidden, if not authorized. Contents of the present documentation refers to products and technologies described in it. All technical data contained in the document may be modified without prior notice Content of this documentation is subject to periodical revision.

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GENERAL SPECIFICATIONS
Model S203TA-D is a complete three-phase network analyzer, with display, suited for u s e with up to 600Vac voltage range, and max current equal to 5A connected to the inputs.The instrument provides all the following electrical measurable quantities: Vrms, Irms, Watt,
VAR, VA, Frequency, Cos and Active Energy. All measurements given above (except frequency) are available both single-phase and three- phase.Measurements are read through serial communication both in floating point and normalized format (except Frequency and Active Energy).It is possible the analog retransmission of any Vrms, Irms,
Watt and Cos quantity either single phase or three-phase, or any phase chosen (by specific display or MODBUS registry). The module is also distinguished by: Communication configurability through software. RS485 serial communication with MODBUS-RTU protocol, maximum 32 nodes. Easy-wiring of power supply and serial bus by means of the bus housed in the DIN rail. High precision: 0,2 % class. Protection against ESD discharge up to 4 kV. Measure input insulation: 4000 Vac towards all the other circuits. Insulation between communication and power supply: 1500Vac. Insulation between retransmitted output and power supply: 1500Vac. Analog output signal settable in voltage or current. Digital output for energy counter Possibility for connection and management by external CTs with 5A output. All kind of insertion possible: single phase, Aron, four wires Possibility to compensate errors caused by frequency change in places where network
frequency is not stable (frequency changes > 30 mHz).

TECHNICAL FEATURES

Communication port

RS485

Baud rate: 1200..115200 baud. Protocol: Modbus RTU

USB
Voltage input Current input
Class/Base Precision (1)
Max Resistance of each CT’s secondary wire :

Mini-USB, for programming (software Easy)
Input
Up to 600 Vac, frequency 50 or 60 Hz Rated range :5 A Max Crest Factor: 3. Continuous Max Current: 15 A
Network Frequency: 50 or 60 Hz.Voltmeter : 0,2 %. Amperometer : 0,2 %. Wattmeter : 0,2 %.
To ensure the accuracy on nominal measure, cable lenght must be compatible with the current transformer. If Rtotal=sum of the resistance of the wire going (from CT to S203TA-D) and back (from S203TA-D to CT), then Rtotal*I2< (CT nominal power)

(1) Precisions are given in the following range: Vrms: 40..600 Vac; Cos

(without error due to external CT)

Irms: 0,4-100% Iprimary of TA

Digital output for energy counter

Type

Passive (it has to be powered on), no protection for short circuit

Range

50 mA / 28 V

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Voltage Output Current Output Transmission error Response time Thermal stability
Voltage Consumption
Installation category

Analog Output
0..10 Vdc, 0..5 Vdc, Min. load resistance: 2 k 0..20 mA, 4..20 mA, Max load resistance: 500 0,1 % (max range). 0,4 s (10%..90%) 100 ppm / K
Other Specifications
11 ..40 VDC or 19 ..28 VAC @ 50 ..60 Hz
Max 2,5 W
Installation
III (up to 300 V), II (up to 600 V)

Temperature Humidity

Environmental conditions
-10 ..+65°C
30 ..90%

Storage temperature
International protection

-20 ..+85°C IP20
Connections

Connections

Screw terminals, 5,08 / 7,5 pitch

Dimensions / case / display

Dimensions Case Display

105 x 89 x 60 mm Plastic UL 94 VO, grey color. Front LCD 2 lines x 16 characters alphanumeric (backlighted)

Isolations

Insulation voltage

4000 Vac between the input and all the other circuits. 1500 Vac between power supply and communication. 1500 Vac between power supply and analog output.
Standards

Reference standards :

EN61000-6-4 (electromagnetic emission, industrial environment).

EN61000-6-2 (electromagnetic immunity, industrial environment).

EN61010-1 (safety)

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OPERATING LOGIC
The module measures the following electrical quantities: Vrms, Irms, Watt, VAR, VA, Frequency, Cos and Active Energy, and provides the values in the corresponding MODBUS registers. In three-phase environments, measurements given above corresponding to any phase are available, other than the three- phase value (except the frequency). These measurements are rendered in both floating point and normalized format (except Frequency and Active energy) between 0..+10000 (-10000 ..+10000 for VAR e Cos). Active energy value is stored in memory and when the instrument is switched off, the last value before switching is kept in memory. The module output can transmit one of the following quantities: Vrms, Irms, Watt, cos as either a current or voltage value. If the instrument is set for three-phase measurements, it transmits automatically the three-phase value of the selected measurement. However, via MODBUS register, the user can choose to transmit the measurement corresponding to any phase: A, B, C. The user can set through MODBUS the values MIN and MAX of the measurement to transmit corresponding to 0% and 100% of the analog output. For example, if the signal is transmitted as current 4..20 mA and the quantity to transmit is voltage Vrms in the 10..300 V range, (therefore MIN=10, MAX=300), then if Vrms measured is 10V, analog output will be 4mA, while if Vrms=300V output will be 20mA. In the intermediate points the behaviour is linear. The analog output values saturate at approximately 11 V for voltage output and at 22mA for current output (analog output clamped at 110 %). If network frequency oscillates more than 30 mHz from rated values (50 o 60 Hz), it’s possibile to compensate errors on measurements of Power and Energy caused by these variations. This option is selectable via MODBUS register. Vrms and Irms measurements are not influenced by these variations. When the module is switched on, the appropriate setting coefficients are measured (depending on the choice of 50 or 60 Hz frequency). All the settings made will be automatically loaded when the module is reset.
NOTE: without load connected to the S203TA-D, only the (displayed) voltage and frequency assume a corrected value.

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ELECTRICAL QUANTITIES

Measured quantity of S203TA-D

ELECTRICAL QUANTITY

SYMBOLS MEASURED CALCULATED

USED

VALUES

VALUES

Root-mean squared voltage (Vrms) VA, VB, VC

EQUATION

Mean three phase voltage

V

(VA+VB+VC)/3

Root-mean squared current (Irms) IA, IB, IC

Mean three phase current

I

Active power (phase) Total three phase active power

PA, PB, PC P

Reactive power (phase)

QA, QB, QC

(IA+IB+IC)/3
PA+PB+PC
(SA,B,C)2-(PA,B,C)2

Total three phase reactive power

Q

QA+QB+QC

Apparent power (phase)

SA, SB, SC

Total three phase apparent power

S

cos(phase)

cosfiA, cosfiB, cosfiC

Total three-phase cos

cosfi

V *I A,B,C A,B,C

SA+SB+SC

P / S A,B,C

A,B,C

P / S

Frequency

Hz

Active Energy (phase) Total three-phase active energy

EA, EB, EC E

EA+EB+EC

Retransmission range

Electrical Quantity V rms
I rms Active Power Reactive Power
Apparent Power Cos
Frequency

Measurement Range 0..600 Vac
0..I primary of CT (0..I primary of CT600)W
(0..I primary of CT600)VAR (0..I primary of CT*600)VA
0..1 40..70 Hz

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ELECTRIC CONNECTIONS

POWER SUPPLY

26 25

11 ÷ 40 VDC 19 ÷ 28 VAC
2.5 W

RS 485

33

B

32

A

31

GND

There is no insulation between RS485 and the analog output

13 14 15 16 17 18 19 20 21 22

SINGLE PHASE INPUT

VG

A N

TA ZL
13 14 15 16 17 18 19 20 21 22

ARON Three-Phase without Neutral

A VG B
C

TA
ZL
TA 13 14 15 16 17 18 19 20 21 22

3 WIRES Three-Phase without Neutral

A
VG B NC

TA

TA

ZL

TA

13 14 15 16 17 18 19 20 21 22

4 WIRES Three-Phase

A VG B

TA TA

ZL

with Neutral

NC

TA

Note: You can’t connect the secondary of any CTs to the Earth. Terminals 14, 16 18 and 22 are internally connected. 19 20 21 22 18 17 16 15 14 13

SINGLE PHASE WITHOUT CT

A VG
N

5 Arms Max

ZL

Note: PAY ATTENTION to the different terminals position from the other schematics

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ANALOG OUTPUT

The module provides a programmable, analog output in voltage (0..10 Vdc) or active and

passive current (0..20 mA). We recommend using shielded cables for the electric

connections.

External power supply

Voltage

35

Active current (1) 36

current (2) 36

V

A

34

35

34

There is no insulation between RS485 and the analog output.
DIGITAL OUTPUT The module has a digital output: each pulse corresponds to a given number of increments about to the energy counter. Imax=V/R=50 mA, Vmax=28V. For more informations, see the S203TA-D display settings manual.

I V
R

29 Digital output
30

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LED PWR
ERR TX RX

STATUS
ON (GREEN)
ON (YELLOW)
Blinking (RED)
Blinking (RED)

LEDs signallings The module is power on
At least one of the active phases’ voltage is less than 40 Vac Data are being transmitted through the RS485 comm. port Data are being received through the RS485 comm. port

SERIAL INTERFACE
For detailed information on RS485 serial interface, consult the documentation provided by the website www.seneca.it, in the section Prodotti/Serie Z-PC/MODBUS TUTORIAL.

SegnalaziPornoegrtraammmitiengLED
The communication parameters have the following default values:: baudrate=38400, no parity, bit number=8, bit stop=1. These values can be modified by display or Modbus protocol. To program the device, download the free software Easy Setup from the website www.seneca.it.

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CASE AND SCREW TERMINAL NUMBERS

36 35 34 33 32 31 30 29 28

26 25 22 21 20 19

For communication debugging, remove the terminals cover to see the internal LEDs.

S SENECA S203TA-D

TX ERR

RX PWR

S203TA-D

FRONT PANEL

10 11 12 13 14 15 16 17 18

A)MEASURE CONFIG

ESC

OK MENÙ

DISPLAY PROGRAMMING
For detailed information on display programming, consult the documentation provided by the website www.seneca.it.
Disposal of Electrical & Electronic Equipment (Applicable throughout the European Union and other European countries with separate collections programs). This symbol, found on your producr or on its packaging, indicates that this product should not be treated as household waste when you wish to dispose of it. Instead, it should be handed over to an applicable collection point for the recycling of electrical & electronic equipment. By ensuring this product is didposed of correctly, you will help prevent potential negative consequences to the environment and human health, which could otherwise be caused by inappropriate disposal of this product. The recycling of materials will help to conserve natural resources. For more detailed information about the recycling of the product, please contact your local city office, waste disposal service of the retail store where you purchased this product.

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References

• SENECA | Automation Interfaces | Official Website

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