Seneca Z-8TC-LAB User manual

MI005171-E
SENECA s.r.l.
Via Austria, 26 – 35127 – PADOVA – ITALY
Tel. [phone] - Fax [phone]
EN
EN
INSTALLATION MANUAL
Z-8TC-LAB
Modbus RTU Module
with 8 ThermoCouple Inputs
ENGLISH 8- 1/THE ORIGINAL VERSION IS IN ITALIAN LANGUAGE
This document is property of SENECA rl. Duplication and reproduction are forbidden, if not authorized.S
Contents of the present documentation refers to products and technologies described in it.
This informations may be modified or integrated for technical and / or commercial requirements.

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Dimensions (L×H×W)
17,5 x 102,5 x 111 mm
Weight
140 g.
Case
Material PA6, Black color.
MODULE LAYOUT
lThermocouples measurement : J, K, E, N, S, R, B, T.type
lμMeasurement available in the following sizes: Voltage ( V) or Temperature (°C, °F, °K)
on Integer 16 bit and Floating-point 32 bit, direct o swapped.
lHigh acquisition speed.
lProtection against electrostatic discharge (ESD) up to 4 kV.
lProgrammable value in case of fault or freezing of last measurement.
lEasy power supply and serial bus wiring by means of the Seneca Z-BUS housed in the DIN rail.
lRemovable screw terminals for section Max. 1.5 mm2cable.
lDIP switches configurable or software configurable communication parameters.
lRS485 Serial communication with MODBUS-RTU protocol.
lFrontal USB Port for MODBUS-RTU configuration and communication.
lChannels individually activabl and configurable in pairs.e
For the two inputs of each terminal group, the following common settings are available:
nMeasurement adjustable for temperature or mV.
nProgrammable filter for reading stabilization.
nRejection programmable at 50 Hz or 60 Hz.
nThree configurable acquisition speeds (two 14-bit and one 15-bit).
nIntegrated cold-junction compensation.
GENERAL CHARACTERISTICS
Z-8TC is a digital converter for thermocouples, with 8 measurement channels, collected into 4-LAB
terminal groups, insulated up to 1.5 kV, among them, from power supply and from serial
communication line. The module is characterized by a six-point overall insulation.
MODULE DESCRIPTION
13 14 15 16
910 11 12
111 mm
10 mm2,510 mm2,5
13 14 15 16
1234
5678
910 11 12
17,5 mm

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Power supply
RS485
MODBUS
Communicat.
1500 VA
1211
10
9
8
7
5
6
2
4
3
1
Input
TC
IDC10
IDC10
Input
TC
Input
TC
Input
TC
16
15
14
13
STANDARDS
EN61000-6-4 Electromagnetic emission, industrial environment
Electromagnetic immunity, industrial environmentEN61000-6-2
SafetyEN61010-1
INSULATION
ENVIRONMENTAL COND.
Temp raturee
Hu ymidit
Altitude
S rage temperatureto
P ction degreerote
-20 – +65°C. –EEPROM storing guaranteed in the range: 0 50 °C.
30% – t condensing90% no
Up to 2000 m a.s.l.
-20 + 85°C–
20IP
MOUNTING
IEC EN60715 DIN Rail
CONNECTIONS
Removable -way terminals4 , mm3.5 pitch, for cable max. 1.5mm .
2
Rear IDC10 connector for CEI EN60715 rail
Micro USB frontal panel connector.
POWER SUPPLY
Tension
Power absorbed
10 – 40 V or 19 – 28 Vdc ac 50 60 Hz–
Max. 0.6W
COMMUNICATION
PORTS
RS485 on IDC10 rear connector.
PROTOCOLS
MODBUS-RTU.
TC INPUTS
Number of channels
Thermocouple type: J, K, E, N, S, R, B, T.
8
TECHNICAL SPECIFICATIONS
LED
State
LEDs Meaning
PWR
(Green)
On
Power supply presence
Off
The device is powered off
FAIL
(Yellow)
On
Fault or Failure: power supply lack, failed channel, failed
T , internal communication error.hermocouple
RX (Red)
On
Data reception from 485 communication port.RS
TX (Red)
On
Data transmission to 485 communication port.RS
LED SIGNALLING ON FRONT PANEL

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Before performing any operation is mandatory to read the full contents of this
manual. The module may only be used by qualified and skilled technicians in the field of
electric installation. Specific documentation is available for download at website:
www.seneca.it/products/z-8tc-lab.
Only the Manufacturer is authorized to repair the module or to replace damaged parts.
The product is susceptible to electrostatic discharge, take appropriate countermeasures
during any operation.
No warranty is granted in connection with faults resulting from improper use, from
modifications or repairs carried out by Manufacturer-unauthorized personnel on the device,
or if the content of this user Manual is not followed..
It is forbidden to place anything that could obstruct the ventilation slits.
.It is forbidden to install the module near heat sources
PRELIMINARY WARNINGS
TC
type
Allowed
Range
Linearization
error
TC
type
Allowed
Range
Lineariz.
error
J
-210 1200 °C–
0.05 °C
S
-50 1768 °C–
0.02 °C
K
-200 1372 °C–
0.05 °C
R
-50 – 1768 °C
0.02 °C
E
-200 1000 °C–
0.02 °C
B
250 1820 °C (*)–
0.03 °C
N
-200 1300 °C–
0.04 °C
T
-200 400 °C–
0.04 °C
TC INPUTS
Measurement range
Span mV
Impedance
ADC
Total error
Thermal Drift
Disturbance nRejectio
Cold Junction Error
(*)Up to 250 °C: the input is considered equivalent to a null temperature value.
-10,1 81,4 mV.–
10 MΩ.
Configurable to 14 or 15 bit.
14 bit ADC and Rejection 50 Hz: "(0,040 % + 13 μV).
15 bit ADC and Rejection 50 Hz: "(0,035 % + 10 μV).
14 bit ADC and Rejection 60 Hz: "(0,045 % + 16 μV).
15 bit ADC and Rejection 60 Hz: "(0,040 % + 12 μV).
< 100 ppm/K.
Configurable to 50 Hz or to 60 Hz.
<1 °C.
Test Current
<50 nA.
CMRR (1)
>155 dB (tested port towards all the other ones at GND).
DMRR (1) (2)
>60 dB.
(1) The values are valid at the setted rejection frequency, with the filter ON.
(2) For disturbance values where the input signal peak does not exceed the limit of acceptability.
Refernce Standard
EN60584-1 (ITS-90).
TECHNICAL SPECIFICATIONS

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1) Install the modules on the DIN rail (max 120).
2) Connect the remote modules using cables of proper length.
On the table the following data about the cables length are provided:
-Bus Length: Modbus network maximum length as a function of the Baud rate.
It is the length of the cables which connect the two bus terminators modules (see table).●MODBUS
-Drop Length: maximum length of a drop line (see table).●MODBUS
MODBUS CONNECTION STANDARDS
Insertion on the IEC EN 60715 DIN rail:
1) Move the two hooks on the back of the module
outwards as illustrated in .Pic 2.
2) Insert the module rear IDC10 connector into a free slot
of DIN rail accessory as you can see in .Pic.1
(the insertion is one way only because the connectors are
polarized).
3) To secure the module to the IEC EN 60715 DIN rail,
tighten the two hooks on the side of the IDC10 rear
connector as shown in .Pic.1
Removal from IEC EN 60715 DIN rail:
As shown in :Pic.2
1) Move outwards the two hooks on the side of the
module, with the help of a screwdriver.
2) Extract the module from the IEC EN 60715 DIN rail.
INSTALLATION ON AND REMOVAL FROM IEC EN 60715 DIN RAIL
In order to ensure optimum performance and a longest working life, the module(s) must be provided
with adequate ventilation and no raceways or other objects that obstruct the ventilation slots.
Never install the modules near heat sources.
We recommend installation in the lower part of the control panel.
INSTALLATION RULES
Disposal of electrical & electronic equipment (applicable throughout the EU and other
countries with separate collection programs). found on this product or on itsThe symbol
packaging indicates that this product it must be handed over to an authorised collection point,
for the recycling of electrical and electronic equipments.
PRELIMINARY WARNINGS
Fig. 1
89
7
11 12
10
Fig. 2
89
7
11 12
10

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Power supply
Power supply
19 28Vac 50 – 60 Hz–
10 40Vdc 0.6 W Max–
IDC10
2POWER SUPPLY
Connect the IDC10 rear connector to provide power supply to module.
The supply voltage must be between:
10 and 40V (any polarity), or between 19 and 28 V .dc ac
The upper limits mus not be exceeded as this can seriously damage the
module If the power supply source is not protected against overload, a safety.
fuse of max. 2.5 A must be installed in the power supply line near the device.
2USB
The module has a micro USB port on frontal panel for configuration and MODBUS-RTU parameters
communication.
ELECTRICAL CONNECTIONS
RS485
A
RS485
B
RS485
GND
IDC10
Power supply
AC-
Power supply
AC+
Fig. 4
B
A
Fig. 3
DIP
switch
Slot
Don’t force the insertion of the IDC10 connector into the Z-PC-DIN bus.
The rear IDC10 connector of the module will be inserted on a free slot of Z-PC-DIN accessory.
In the figure you can see the meaning of the various pins of the rear IDC10 connector if you want to
provide the signals directly through this connector. The pictures and show how toPic.3 Pic.4
connect powersupply and RS485 COM1 port to the rear IDC10 connector.
In case of Z-PC-DINAL2-17,5 accessory use, the signals may be provided by terminal blocks.
The figure shows the meaning of terminals and the position of DIP-switch (present on each DIN rail
supports) for network termination (not used in case of Modbus network).
GNDSHLD: Shield to protect the signal inside the connection cables from electromagnetic
disturbances (recommended).
USE OF Z-PC-DINAL ACCESSORY
Module 2
Module 3
Module 1 Module 5
Module 4
DL
Bus Length
DL: Derivation Length
2MODBUS
Bus length
Derivation Length
Baudrate
1200 m
2 m
115kbps
In order to obtain maximum performances it’s
recommended to use a specific shielded cable, as
an example BELDEN 9841.
MODBUS CONNECTION STANDARDS

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2INPUT FILTER
The filtering methods can be set for each pair of channels.
The filter consists of two independent low-pass filters:
-FIR Filter , in running average, able to increase the rejection of disturbances to the mains power line
frequency and to reduce measuring noise.
-IIR exponential Filter, with programmable time constant, able to dampen fluctuations.
If an input variation higher than is detected, both filters are forced to adapt rapidly tostep 0.75 mA
the new value, stabilising it only later on.
are available insideDetailed information about filter settings the USER MANUAL in the REGISTER
MODBUS section.
2SOFTWARE CONFIGURATIONS
The configuration software, allows the parameter setting.EASY SETUP
This software is available for free on the Internet site: www.seneca.com.
Some parameters can also be set using DIP-switches.
CONFIGURATIONS
Detailed information about list of MODBUS registers and their functions are available inside the (Z-8TC).USER MANUAL
MODBUS REGISTERS
AB
GND
109
RS485
IDC10
78
2485RS
Connection for RS485 communication with the Modbus master system
through Z-PC-DINAL2-17.5 accessory.
Note: the indication of the RS485 connection polarity is not standardised
and in some masters may be inverted
28 TC INPUTS
The module input accepts thermocouples type:
J, K, E, N, S, R, B, T.
For electrical connections it is recommended to
use shielded cable.
The two channels that are part of the same
terminal block have the ground terminal internally
connected and aren’t isolated between them.
However, 1.5 kV insulation is guaranteed between
channelsofdifferentterminalblocks.
ELECTRICAL CONNECTIONS
*
1
3
2
TC 2
TC 1
++
--
4
5
7
6
TC 4
TC 3
8
*
*
++
--
9
11
10
TC 6
TC 5
12
13
15
14
TC 8
TC 7
16
*
*
++
-- ++
--

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Technical support
[email protected]
Product Informations
[email protected]
CONTACTS
The USB communication port has priority over the port RS485 and is closed after 3 s of inactivity.
The parameters (not configurable) for USB port are: 2400, 8,N,1 Addr. 1. The protocol is MODBUS RTU.
USB COMMUNICATION PORT
2DEFAULT CONDITION FOR THE CONFIGURATION PARAMETERS OF THE MODULE
The instrument is configured from the factory with ÈAll DIP-switches at OFF position
RS485 MODBUS protocol comunication parameters:
38400, 8,N,1 Addr. 1
2DEFAULT CONDITIONS FOR CHANNEL GROUPS OF THE MODULEINPUT
Enabling
Given data
Cold joint compensation
Rejection
ADC / Filter
Thermocouple type
Both channels are enabled
°C
Enabled
50 Hz
ADC 15 bit with average filter
J for both channels
FACTORY SETTINGS
DIP-SWITCHES CONFIGURATION
BAUD
RATE
SW1
1
2
9600
19200
38400
57600
ADDRESS
SW1
3
4
5
6
7
8
1
2
...
...
...
...
...
...
...
63
LEGENDA
ON
OFF
BAUD RATE AND ADDRESS FROM EEPROM
SW1
1
2
3
4
5
6
7
8
Terminatore
RS485
SW1
10
ON
OFF
Before setting the DIP switches you must disconnect the power supply.
The DIP-switches position defines the Modbus Address and Baud Rate communication parameters.
In the following table the Baud Rate and Address values are listed as a function of the DIP-switches
position.
Note: If switches from 1 to 8 are in OFF position, communication settings are retrieved from
EEPROM.
2nd Note: The termination of the RS485 line must be carried out only at the ends of the
communication line.