Seneca Z203-1 User manual

ENGLISH - 1/16MI00117 -E8
Z203-1
Input/Retransmitted output
Voltage Input :
Current Input :
Class/Base Precision :
upto500Vac;frequency:35to75Hz.
Current inputrated range: 5Arms, Max peak factor: 3,
MaxCurrent:15A,Frequency:35to75Hz.
Voltmeter:0,5%.
Amperometer:0,5%.
Wattmeter:0,5%.(activepower)
Advanced Single-phase Network Analyser
Model Z203-1 is a complete single-phase network analyser suited for use with up to 500
Vacvoltagerangeand 5A(35to75Hz)current.
The instrument provides all the following electrical measurable quantities , ,: Vrms Irms
Watt Var Frequency,Energy,Cos, , .
Measurements are read through serial communication and both floating point and
normalisedformat(exceptforenergy).The DIP-switches (orModbusregisters)canbeset
for the analogue retransmission of any Vrms, Irms, Watt, Var, Frequency, and Cos
quantity. Themoduleisalsodistinguishedby:
GeneralDescription
Analog Output
Output Voltage :
Output Current :
Transmission error :
0..10Vdc,0..5Vdc,minimumloadresistance:2k .
0..20mA,4..20mA,maximumloadresistance:500
0,1%(max.range).
EN
FacilitatedpowersupplyandserialbuswiringbymeansofthebushousedintheDINrail.
CommunicationconfigurabilitythroughDIP-switchorsoftware.
s485serialcommunicationwithMODBUS-RTUprotocol,maximum32nodes.R
Powerinputisolation:3750Vacrespecttoalltheothercircuits.
Isolationbetweencommunicationandpowersupply:1500Vac.
Isolationbetweenretransmittedoutputandpowersupply:1500Vac.
Analogueoutputsignalsettableinvoltageorcurrent.
Possibility for connection and management by an external CT (only if Z203-1 is configurated
by a configuration software).
Energy counter: pulse digital output, reading on Modbus register (the count is saved into
retentive memory).
EasyconfigurationwiththesoftwareEasy,downloadablefromwww.seneca.it
Technical Specifications
Power Supply: 10–40 Vo19–28V (50–60Hz)
Consumption: max2.5W
Communication Ports: -RS485,1200..115200Baud.
-RS232, 2400 Baud, Address: 01, Parity: NO, Data: 8
bits;Stopbits:1.
Protocol: MODBUS-RTU
Installation category: II (Up to 300 V)

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Insulation voltage :
Protection :
Environmental conditions :
Storage temperature :
Signalling by LED :
Connections :
Reference standards :
Dimensions and weight :
3750 Vac between the measurement input and all the
other circuits.1500 Vac between power supply and
communication. 1500 Vac between power supply and
outputs.
IP20.
Temperature -10..+65°C.
Humidity 30..90%non-condensing.
Altitude:upto2000ma.s.l.
-20..+85°C
Powersupply,Fail,RS485communication.
-Removable3-wayscrewterminals,5.08mmpitch.
-RearIDC10connectorforDINrail.
-3.5 mm stereophonic front jack for RS232 (COM)
connection.
EN61000-6-4 (electromagnetic emission, industrial environment)
EN61000-6-2(electromagneticimmunity,industrialenvironment)
EN61010-1 (safety). All circuits must be insulated from the other
circuits under dangerousvoltagewith double insulation.The power
supply transformer must comply with EN60742: “Insulated
transformersandsafetytransformers”.
Notes:
-Usewithcopperconductor.
-UseinPollutionDegree2Environment.
-PowerSupplymustbeClass2.
-WhensuppliedbyanIsolatedLimitedVoltageand/orLimited
CurrentPowerSupply,afuseratedmax2,5Ashallbeinstalledin
thefield.
100 x 112 x 17,5 mm, 140 g.
Box : PA6, black
Operatinglogic
The module measures the electrical measurable quantities: Vrms, Irms, Watt, Var,
Frequency, Energy, Cos and provides the values in the corresponding MODBUS
registers. Except for energy, these measurements are rendered in both floating point and
normalized format between 0..+10000 (0 ..+10000 for absolute value of VAR and Cos
350..750 for frequency from 35.0 Hz to 75.0 Hz). The module output transmits one of the
previous quantities selected (excluding energy) as either a current or voltage value. The
range of the retransmitted output is proportional to the full scale value of the quantity
measured:ifthesignal isa4..20mAcurrentsignalandthequantitytobetransmittedisthe
Vrms voltage, for example, 4 mAwill equal 0 V and 20 mAwill equal 500 V because these
arethetopandbottomfullscalevaluesforrmsvoltage.
Digital Output for pulses (energy counter)
Type : Passive(itmustbepowered),R>480
Range : 50mA
Insulation : 1500Vpeak
Screw terminal : 1and6(commonwithGNDanalogueoutput)

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Installationrules
The module is designed to be installed in vertical position on a DIN 46277 rail. In order to
ensure optimum performance and the longest working life, the module(s) must be
supplied adequate ventilation and no raceways or other objects that obstruct the
ventilation slots. Never install modules above sources of heat; we recommend installation
inthelowerpartofthecontrolpanel.
Electric connections
RS485 SERIAL PORTAND POWER SUPPLY
Theelectricconnectionsforpower supplycanbemadebyusingeithertheterminalsorthe
bus for the Seneca DIN rail. The RS485 bus connections are available only by using the
busfortheDINrail.
Relay scaling can also be selected from 100%, 50 % or 25 %. In the example above, with
50%retransmissionscaling, a4mAsignalwillequal0Vanda20mAsignalwill equal250
V. The retransmission values saturate at approximately 11 V for voltage outputs and at
around21mAforcurrentoutputs.Whenthemoduleisswitchedon,theappropriatesetting
coefficients are measured (depending on the choice of 50 or 60 Hz frequency). All the
settingsmadewillbeautomaticallyloadedwhenthemoduleisreset.TheFeRAM allowsto
recoverytheenergyifablack-outoccurs.
Note that the Vrms, Irms, Active Power and frequency values are obtained by direct
measurement, whereas the energy, Reactive Power and cos values are calculated.
Active power can be only greater than 0. An example: if reactive power is -2500 VAR or
+2500 VAR (physical value, electric line), corresponding numeric value is +10000 and
analogue output (available at the screw terminals) is +10 V (if SW2-2,3=”00”).If reactive
power is 0 VAR (physical value, electric line), corresponding numeric value is 0 and
analogue output (available at the screw terminals) is 0 V (if SW2-2,3=”00”). Cosfi has the
same behavior of reactive power. See the tables provided in APPENDIX A for the
measurementandretransmissionrangesinthecasesof50%and25%scaling.
Isolations
Power
supply
RS485
GND
AB
AC, DC
IN
OUT
OUT
LINE
OUT
LINE
IN
RS232
RS232
DIG.
OUT

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INPUT/RETRANSMITTEDOUTPUT
The module accepts an input voltage of up to a maximum 500 Vac. The input voltage is
connected to Terminals 10 and 12, whereas the load to be analysed is connected to
Terminals7and9.
3.5 mm Stereo Jack
DB9-F
GND Rx
Tx
Rx
Tx
GND
RS232SERIAL PORT
Connection cable DB9 with a 3.5 mm stereo Jack, can be assembled as indicated in the
followingfigure,orcanbeboughtasanaccessory.
1
RS485 B
RS485 A
RS485 GND
Power supply AC -
Power supply AC +
IDC10
Bus connector for DIN rail connections
2.5 W
10 ÷ 40 VDC
19 ÷ 28 VAC
2
3
Power supply from terminals
There is no isolation between RS485 and the retransmitted output.
MAX
5 A rms
MAX
500 VAC
7
9
10
12
LINE IN LINE OUT
Z203-1
2 3
POWER SUPPLY
LINE
LOAD

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Indications by LED on the frontal panel
PWR LED (GREEN)
Steady ON Meaning
Power supply is present.
ANALOGUE OUTPUT
The module provides an analog output in voltage (0..10 Vdc, 0..5 Vdc) or current (0..20
mA,4..20mA).Werecommendusingshieldedcablesfortheelectricconnectionsabove.
Voltage Output Current Output
++
5 5
6 4
EXAMPLE OF CONNECTION WITH AN EXTERNALCT (inthiscase,
configuretheZ203-1usingsoftware,NOTdip-switch)
There is no isolation between RS485 and the analog output.
Z203-1
P
230Vac
I I LOAD
N
97 10 12
S1/K S2/L
CT
N.C.
P1/K P2/L
DIGITAL OUTPUT
The module has a digital output: each pulse (200 ms) corresponds to a given number of
increments of the energy counted (see the register Digital Output Ratio).
Imax=V/R=50mA
Digital output
+
6
1
+
-
I
R
V

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Serial interface
FordetailedinformationonRS485serialinterface,consultthedocumentationprovidedby
thewebsitewww.seneca.it,inthesection .Prodotti/SerieZ-PC/MODBUS TUTORIAL
ERR LED (YELLOW)
Meaning
Steady ON Communication error between internal peripherals.
RX LED (RED)
TX LED (RED)
Steady ON
Steady ON
Meaning
Meaning
Data are being received through the RS485 communication port
Data are being transmitted through the RS485 communication port
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
57600 Baud
38400 Baud
19200 Baud
9600 Baud
1SW1 2
BAUD RATE
In all the following tables, the indication corresponds to a DIP-switch set in 1 (ON); no
indicationisprovidedwhentheDIP-switchissetin 0(OFF).
The instrument leaves the factory with all DIP-switches configured in position 0. The
settings of the DIP-switches defines the module's communication parameters: address
andspeed.
Default configuration
DIP-SWITCH SETTING
Flashing Voltage measured at less than 40 Vac and at less than 20 mA.
Network Frequency: 60 Hz
1SW2 Network Frequency: 50 Hz
NOMINAL FREQUENCY (50 or 60 Hz)

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(*) The default configuration is the following: Address 1, 38400, no parity, 1 stop bit.
0..5 V
0..20 mA
4..20 mA
SW2 0..10 V
OUTPUT TYPE
For the product's programming and/or configuration tools, consult the website
www.seneca.it.
During initial programming, the EEPROM (SW3 ..8 in OFF position) default setting
valuesoriginallyprogrammedasfollowscanbeused:
Address = 01 SPEED =38400 Baud PARITY= none BIT NUMBER = 8 STOP, , , ,
BIT=1.
The module can also be programmed through the front connector (COM) while paying
attentiontosetthefollowingconnectionparameters:
Address=01,Speed=2400Baud PARITY=none STOP BIT 1, , = .
The Com communication port behaves in the sameway asthe RS485bus port except for
thecommunicationparametersdescribedabove.ItalsohaspriorityovertheRS485serial
portandclosesafter15secondsofinactivity.
Programming
2 3
Retransmission of cos
Retransmission of frequency
Retransmission of VAR
Not allowed ( )configuration by EEPROM if SW2-1..8 are all «0»
Not allowed
Retransmission of Watt
Retransmission of Irms
Retransmission of Vrms
6SW2 7 8
SELECTION OF QUANTITY RETRANSMITTED (RETR. OUTPUT)
25 %
Not allowed
100%
SW2
50 %
RETRANSMISSION SCALING (OUT. RANGE)
4 5
SW2
SW3
TERMINATOR RS485
1 2
x
xTerminator ON, the SW3-2 is not used.
Terminator OFF, the SW3-2 is not used.

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Overall Dimensions
17,5 mm
100 mm
1 2 3
4 5 6
7 8 9
10 11 12
PWRERR
RX TX
Z203
COM
Frontal Panel and Led Dip-switch and Modbus register
If all the dip-switch of SW2 are equal to zero, so
“00000000”: the module acquires the configuration from
EEPROM for: nominal frequency, output-type, output-
electric value, retransmitted output, electric start scale,
electricendscale(seethemodbusregisters).
If at least one dip-switch of SW2 is different from zero: the
moduleacquires fromonlytheconfigurationsappliable
dip-switch SW2. For example: if SW2 is equal to “1 | 00 |
00 | 001”, then the nominal frequency is configurated as
“60 Hz” from dip-switch, the output type is configurated as
“0..10 V” from dip-switch, the retransmission scaling is
configurated as “100%” and the retransmitted output is
VRMS. In this case, the content of the registers
40110/40111, 40112/40113 (retransmitted output
range), 40114/40115, 40116/40117 (analogue output
range)arenotacquiredforthescaling.

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MODBUS REGISTERS
Holding Registers
The 16-bit Holding Registers have the following structure:
The Bit notation [x:y] shown in the 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
combinationsofthevaluesofthetwobits.RememberthattheMODBUS3and6functions
(respectively of multiple reading and single writing) can be executed on the following
registers.Defaultvaluesaremarkedwith*symbol.
Thefollowingindication(onlyreadableoralsowritable)isprovidedforeveryregister:
R:Readable
W:Writeable
Supported MODBUS Commands
Code
03
06
Function
Read Holding Registers
Write Single Register
Description
Reading of registers up to 16 words at a time
withinthesamegroup.
Writing of a word register
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Most
Significant bit Least Significant bit
Bit Index
Word (16 bits): MODBUS Register
Z203-1 has MODBUS 16 bits (words) registers, accessible by RS485 or RS232 serial
communication. In the next paragraphs, we shall describe the supported MODBUS
commands,andthefunctionsoftheregisters.
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MI00117 -E8 ENGLISH- 10/16
REGISTER
MACHINE ID Description
Bit[15:8]:containthemodule'sID
Bit [7:0] contain the firmware's external
revision.
R/W
R
ADD.
40001
ADDR
BAUDR
CT_RATIO
Bit [15:8]
Bit [15:8]
Bit [7:0]
Bit [7:0]
Register for the setting of the module's
addressandparitycontrol.
Register for the setting of the Baud rate and
theresponsedelaytimeincharacters.
Register for the setting of thecoefficient ofthe
CT connectedtotheinstrument.
Set the module's address. Permissible values
from to (decimal values in the interval0x00 OxFF
of0-255).Defaultaddress:1.
Set the serial communication speed value
(Baudrate):
00000000 (0x00): 4800 Baud
00000001 (0x01): 9600 Baud
00000010 (0x02): 19200 Baud
00000011 (0x03): 38400 Baud*(Default).
00000100 (0x04): 57600 Baud
00000101 (0x05):115200 Baud
00000110 (0x06): 1200 Baud
00000111 (0x07): 2400 Baud
Set the response delay time in characters that
represents the number of pauses of 6 characters
each to be entered between the end of the Rx
messageandthestartoftheTxmessage.
Defaultvalue:0(hexadecimal:0x00).
Set the type of parity control:
00000000 : No parity ( NONE )*(Default)
00000001 : Even parity ( EVEN )
00000010 : Odd parity ( ODD )
R/W
R/W
R/W
40002
40003
40004
GROUP 1
Set the coefficient forany CT connected to themodule.
The transformation ratio multiplied by 10 must be
entered.This coefficient will influence the floating point
value of IRMS, Active Power and Reactive Power, but
will not influence the integer (0 - 10000) and
retransmission values. Default: 10 (retransmission is
not influenced by CT value, if configuration from Dip-
switch)
FW_CODE Register containing the firmware's internal
code. R40005
Bit [15:0]