Seneca S203TA User manual

Technical Specifications
Input
S203TA Advanced Three-phase Network Analyzer
GeneralDescription
ModelS203TAisacompletethree-phasenetworkanalyzersuitedfor use with up to
600Vac voltage range, and current range given by the nominal range of the CTs with 5A
Outputconnected.
The instrument provides all the following electrical measurable quantities: Vrms, Irms,
Watt, Var, Va, Frequency, Cos Active Energyand . All measurements given above
(exceptfrequency)areavailablebothsingle-phaseandthree-phase.
Measurements are read through serial communication both in floating point and
normalisedformat(exceptFrequencyandActiveEnergy).
The DIP-switches can be set for the analog retransmission of any Vrms, Irms, Watt and
Cos quantity either single phase or three-phase, or any phase chosen (by specific
MODBUSregistry).Themoduleisalsodistinguishedby:
CommunicationconfigurabilitythroughDIP-switchorsoftware.
RS485serialcommunicationwithMODBUS-RTUprotocol,maximum32nodes.
Easy-wiringofpowersupplyandserialbusbymeansofthebushousedintheDINrail.
Highprecision:0,2%class.
ProtectionagainstESDdischargeupto4kV.
Powerinputinsulation:3750Vactowardsalltheothercircuits.
Insulationbetweencommunicationandpowersupply:1500Vac.
Insulationbetweenretransmittedoutputandpowersupply:1500Vac.
Analogoutputsignalsettableinvoltageorcurrent.
PossibilityforconnectionandmanagementbyexternalCTswith5Aoutput.
Allkindofinsertionpossible:singlephase,threeorfourwires(three-phasewith3 CTs).
Possibility to compensate errors caused by frequency change in places where network
frequencyisnotstable(frequencychanges>30mHz).
Power Supply :
Consumption :
Communication Ports:
Protocol :
10 - 40 Vdc o 19 - 28 Vac (50 - 60 Hz).
max 2,5 W.
Rs485,1200-115200Baud.
MODBUS-RTU.
MI001458-E ENGLISH - 1/16
Voltage Input Upto600Vac,Frequency:50o60Hz.
Ratedrange:givenbyI ofCT.NOMINAL
MaxCrestFactor:3.
MaximumCurrent:3*I ofCT.NOMINAL
Current Input :
Class/Base Precision :
(1)
NetworkFrequency:50or60Hz.
Voltmeter:0,2%.
Amperometer:0,2%.
Wattmeter:0,2%.
Max Resistance of each CT’s
secondary wire : Thesumoftheresistanceofthewiregoing(fromCTto load)andback(fromloadtoCT)<ratedburden
Vrms: 40..600 Vac
: 0,4-100% Iprimary of TAIrms
(1): Precisions are given in the following range:
EN

MI001458-E ENGLISH - 2/16
Insulation voltage :
International protection :
Environmental conditions :
Storage temperature :
Signalling by LED :
Connections :
Reference standards :
3750 Vac between the measurement input and all the
othercircuits.
1500 Vac between power supply and communication.
1500 Vac between power supply and analog output.
IP20.
Temperature -10-+65°C.
Humidity 30 - 90 % non-condensing.
Altitude 2000 slm.
-20 - +85 °C.
Power supply, Fail, RS485 communication.
Removable 3-way screw terminals, 5.08 mm pitch.
EN61000-6-4/2002-10 (electromagnetic emission,
industrialenvironment).
EN61000-6-2/2006-10 (electromagnetic immunity,
industrialenvironment).
EN61010-1/2001(safety)
All circuits must be insulated from the other circuits
under dangerous voltage with double insulation. The
power supply transformer mustcomplywith EN60742:
“Insulatedtransformersandsafetytransformers”.
Plastic UL 94 VO, grey color.
Other Specifications
Operatinglogic
The module measures the following electrical quantities: Vrms, Irms, Watt, Var, Va,
Frequenza, Cos and Active Energy, and provides the values in the corresponding
MODBUSregisters.
In three-phase environments, measurements given above corresponding to any phase
areavailable,otherthanthethree-phasevalue(exceptthefrequencyofcourse).
These measurements are rendered in both floating point and normalised 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
valuebeforeswitchingiskeptinmemory.
The module output can transmit, via DIP-switch setting, one of the following quantities:
Vrms,Irms,Watt,cos aseitheracurrentorvoltagevalue.Iftheinstrumentissetforthree-
phase measurements, it transmits automatically the three-phase value of the selected
measurement. However, via MODBUS register, the user can choose to transmit the
measurementcorrespondingtoanyphase:A,B,C.
The user can set through MODBUS the values and of the measurement toMIN MAX
transmitcorresponding to 0%and100% of theanalogoutput. Forexample, ifthe signalis
transmittedascurrent4..20mAandthequantitytotransmitisvoltageVrmsinthe10..300
Analog Output
Voltage Output : 0-10Vdc,0-5Vdc,Min.loadresistance:2k
Current Output : 0-20mA,4-20mA,Maxloadresistance:500
Transmission error : 0,1%(maxrange).
Response time (10%..90%) : 0,4s.
Dimensions (L x W x H) : 105 x 89 x 60 mm
Box :

MI001458-E ENGLISH - 3/16
Measurement and retransmission range
V range,(therefore ), then if Vrms measured is 10V, analog output willMIN=10, MAX=300
be 4mA, while if Vrms=300V outputwill be 20mA. In the intermediate points the behaviour
is linear. The retransmission values saturate at approximately 11 V for voltage output and
at22mAforcurrentoutput(analogoutputclampedat110%).
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
arenotinfluencedbythesevariations.
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
automaticallyloadedwhenthemoduleisreset.
Total three-phase active energy E E +E +EA B C
Active Energy (phase) E E EA B C
Frequency Hz
Total three-phase coscos _3PHP/S
Total three phase apparent power S S +S +SA B C
cos (phase) cos cos A B
cosCP /S
A,B,C A,B,C
Apparent power (phase) S S SA B C V *IA,B,C A,B,C
Total three phase reactive power Q Q +Q +QABC
Reactive power (phase) Q Q QA B C
Total three phase active power P P +P +PA B C
Mean three phase current I (I +I +I )/3A B C
Active power (phase) P P PA B C
Root-mean squared current I I IABC
Mean three phase voltage V (V +V +V )/3A B C
Root-mean squared voltage V V VA B C
Electrical
Quantity Symbols
used Measured Values Calculated Values Equation
used
Electrical Measurements
(S ) -(P )
A,B,C A,B,C
2 2
Electrical
Quantity Measurement Range Selectable retransmission Range
Vrms
Irms
Active Power
Reactive Power
Apparent Power
Frequency
Active Energy
0..600 Vac
0..I of TAPRIMARY
(0..IPRIMARY TA * 600)VAR
(0..I TA * 600)WPRIMARY
0..1
(0..I TA * 600)VAPRIMARY
40..70 Hz
0..10 V, 0..5 V, 0..20 mA o 4..20 mA
0..10 V, 0..5 V, 0..20 mA o 4..20 mA
0..10 V, 0..5 V, 0..20 mA o 4..20 mA
5..10 V, 2,5..5 V, 10..20 mAo 12..20 mA

MI001458-E ENGLISH - 4/16
Electric connections SERIAL PORT RS485
POWER SUPPLY
ThereisnoinsulationbetweenRS485andtheanalogoutput
25
26 10 ÷ 40 VDC
19 ÷ 28 VAC
2.5 W B
A
GND
32
31
33
VGA
N
22212019
181716151413
CT
ZL
SINGLE
PHASE
VGA
C
B
22
21
2019
181716151413
CT
CT ZL
3 WIRES
(Three-Phase
without Neutral)
VGA
C
B
22212019
181716151413
CT
NZL
CT
CT
CT
4 WIRES
(Three-Phase with
Neutral)
Note: You can’t connect the secondary of any CTs to the Earth.
Pins 14, 16 18 and 22 are internally connected.

MI001458-E ENGLISH - 5/16
Indications by LED on the frontal panel
27 28 29 30
PWRERR Tx Rx
PositionandIdentificationofLEDs
LedIndications
Voltage
+
Active Current (1)
Ext. Power Supply Current(2)
ThereisnoinsulationbetweenRS485andtheanalogoutput.
34
35
35 34
36 36
+
OUTPUT
The module provides an analog output in voltage (0..10 Vdc, 0..5 Vdc) or active and
passive current (0..20 mA, 4..20 mA). We recommend using shielded cables for the
electricconnections.
(1) Passive Output already powered to connect to passive inputs.
(2) Passive Output not powered to connect to active inputs.
27: (GREEN)PWR LED Description
Steady On Power supply is present
28: (YLW)ERR LED Description
Steady On Communication error between internal peripherals
Blinking At least one of the active phases’ voltage is less than 40 Vac
29: (RED)TX LED Description
Steady On Data are being transmitted through the RS485 comm. port
30: (RED)RX LED Description
Steady On Data are being received through the RS485 comm. port
SINGLE PHASE
WITHOUT TA
VGA
N
22212019 18 17 16 15 14 13
ZL
5 Arms Max
Note: to the different pins position from the other schematicsPAY ATTENTION

MI001458-E ENGLISH - 6/16
0..5 V
0..20 mA
4..20 mA
SW2 0..10 V
ANALOG OUTPUT
Fixed Address: 03
Fixed Address: 04
Fixed Address, as from binary representation
Fixed Address: 63
Fixed Address: 02
Communication Parameters from EEPROM
Fixed Address: 01
SW1 43
X
5
X
6
X
7
X
8
X X
ADDRESS
In all the following tables, the indication corresponds to a DIP-switch set in 1(ON); no
indication is provided when the DIP-switch is set in 0 (OFF).
Network frequency 60 Hz
Single-phase
1
4 5
SW2
SW2
Network frequency 50 Hz
Three-phase
NETWORK FREQUENCY SELECTION (50 o 60 Hz)
SELECTION OF ENVIRONMENT: SINGLE-PHASE OR THREE-PHASE
2 3
57600 Baud
38400 Baud
19200 Baud
9600 Baud
1SW1 2
SPEED
DIP-SWITCH SETTING
The instrument leaves the factory with all DIP-switches configured in position 0. The
setting of the DIP-switches defines the module’s communication parameters: address
and speed and the following settings
The isthefollowing:DefaultConfiguration
Baudrate:38400.
Address : 1.
Network Frequency : 50 Hz.
Analog Output : 0..10 V.
Environment : Three-phase.
Insertion type : 4 wires.
Transmitted quantity : Mean three-phase voltage.

MI001458-E ENGLISH - 7/16
Serial interface
Fordetailedinformationon RS485serialinterface,consultthedocumentationprovidedby
thewebsitewww.seneca.it,inthesection .Prodotti/SerieZ-PC/MODBUS TUTORIAL
For the product’s programming and/or configuration tools, consult the website
www.seneca.it.
During initial programming, the EEPROM (SW1 3..8 in OFF position) default setting
valuesoriginallyprogrammedasfollowscanbeused:
Address=001 SPEED=38400Baud PARITY=none, BIT NUMBER=8, STOP BIT=1., ,
Programming
Retransmission of cos
Retransmission of Watt
Retransmission of Irms
Retransmission of Vrms
Leds, Screw terminals and DIP-switch positions
SW2 6 7
SELECTION OF QUANTITY RETRANSMITTED
10 11 12
SENECA
S203TA
13 14 15 16 17 18
2736 2635 2534 2433 2332 2231 2130 2029 1928
SW1
LED
SW2
Note: The DIP-switch 5 of Sw2 must always be in the OFF position

MI001458-E ENGLISH - 8/16
MODBUS REGISTERS
Holding Registers
The 16-bit Holding Registers have the following structure:
TheBitnotation[x:y]showninthe
table indicates all the bits from x
to y. For example, Bit [2:1]
indicates bit 2 and bit 1, and
illustrates the meaning of the
various linked combinations of
the values of the two bits.
Remember that the MODBUS 3,
6and16functions(respectively
Supported MODBUS Commands
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Most significant
Bit Least Significant Bit
Index Bit
Word (16 bit): MODBUS Register
S203TAhas MODBUS 16 bits(words) registers, accessible by RS485communication. In
the next paragraphs, we shall describe the supported MODBUS commands, and the
functionsoftheregisters.
16 Write Multiple Register Writing of registers up to 16 words at a time
within the same group
06 Write Single Register Writing of a word register
03 Read Holding Registers Reading of registers up to 16 words at a time
within the same group
Code Function Description
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product, please contact your local city office, waste disposal service or thè retail store where you
purchasedthisproduct.
SENECA s.r.l.
Via Austria, 26 - 35127 - PADOVA - ITALY
Tel. [phone] - Fax [phone]
e-mail: [email protected] - www.seneca.it
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ofmultiplereading,singleandmultiplewriting)canbeexecutedonthe followingregisters.
Defaultvaluesaremarkedwith*symbol.
Thefollowingindication(onlyreadableoralsowritable)isprobidedforeveryregister:
R:Readable - W:Writeable

ENGLISH - 9/16MI001458-E
REGISTER
MACHINE ID Description
Bit[15:8]containthemodule’sID:41.
Bit [7:0] contain the firmware’s external
revision
R/W
R
IND.
40001
I_PRIM_FL_MSW
CHECK_TA
PHASE_RETR
SelecttheratedcurrentofCTsinfloatingpoint
(mostsignificativeword).
Kindof CT used:passive CT or compensated
CT
Select the phase on which the analog output
willtransmit.
R/W
R/W
R/W
40018
40016
40017
Select the rated current of the CTs connected to
the instrument in floating point format. This
register influences floating point value of: Irms,
Active power, Apparent Power, Reactive Power
and Energy (both single and three-phase). It
doesn’t influence normalised values (0 - 10000)
andtransmittedoutput.Default:1000,0.
Value of the quantity to transmit (defined via DIP-
switch and phase selected via PHASE_RETR
register, 40017) which gives the minimum value
(0%) of the transmitted output. The value is
expressed in floating point format (most
significative word) and therefore it must be
expressed in the corresponding measurement
unit of the quantity chosen (V for Vrms, mA for
Irms,WforWatt).Default:0,0.
Notused.
I_PRIM_FL_LSW SelecttheratedcurrentofCTsinfloatingpoint
(leastsignificativeword). R/W40019
Bit [15:0]
Bit [15:0]
Bit [15:1]
Bit 0
Bit [15:0]
Select thekindof CT used:
0*:PassiveCTwith5Aoutput.
1:CompensatedCT,whichhasnophaseerror.
Precision class of the instrument is given by (CT
class)+0,3.
Select the phase on which the analog output
wiltransmitthequantityselected:
0:PhaseA(defaultforsingle-phase).
1:PhaseB.
2:PhaseC.
Allothervalues:Threephasevalue(defaultthree-
phase).
MINOUT_FL_MSW Value of the quantity to transmit which gives
the minimum retransmitted output (floating
pointformat,mostsignificativeword).
40020 R/W

MI001458-E ENGLISH - 10/16
Value of the quantity to transmit (defined via DIP-
switch and phase selected via PHASE_RETR
register, 40017) which gives the maximum value
(100%) of the transmitted output. The value is
expressed in floating point format (most
significative word) and therefore it must be
expressed in the corresponding measurement
unit of the quantity chosen (V for Vrms, mA for
Irms,WforWatt).Default:600,0.
Bit [15:0]
ADDR_PARITY
Bit [15:8]
Bit [7:0]
Register for the setting of the module’s
address and parity control.
Set the module’s address. Allowed values from
0x00 0xFFa (decimal values in the interval of 0-
255).Default:1.
Set the type of parity control:
00000000* : No parity ( NONE )
00000001 : Even parity ( EVEN )
00000010 : Odd parity ( ODD )
R/W40025
MAXOUT_FL_MSW Value of the quantity to transmit which gives
the maximum retransmitted output (floating
pointformat,mostsignificativeword).
40022 R/W
MINOUT_FL_LSW
MAXOUT_FL_LSW
CHECK_FREQ
Value of the quantity to transmit which gives
the minimum retransmitted output (floating
pointformat,leastsignificativeword).
Value of the quantity to transmit which gives
the maximum retransmitted output (floating
pointformat,leastsignificativeword).
Enables measurement errors compensation
of Active Power and Energy caused by
networkfrequencyvariations.
40021
40023
40024
R/W
R/W
R/W
Bit [15:1]
Bit 0 Notused
Errors compensation caused by network
frequencyvariations:
1: If networkfrequency is not stable at50 Hzor 60
Hz, or has consistent variations (> 30 mHz), this
register corrects the measurement of Power and
Energy.The measurements of Vrms and Irms are
notinfluencedbythissetting.
BAUDR_ANSDEL Register for the setting of the Baud rate and
the response delay time in characters. R/W40026
Bit [15:8] Set the serial communication speed value
(Baudrate):