Seneca Z-8TC-1 User manual

MI00488-1-EN
SENECA s.r.l.
Via Austria, 26 – 35127 – PADOVA – ITALY
Tel. [phone] - Fax [phone]
Manuals and configuration software are available at website: www.seneca.it/products/z-8tc-1
EN
EN
INSTALLATION MANUAL
Z-8TC-1
Modbus RTU Module
with 8 ThermoCouple Inputs
ENGLISH - 1/8THE ORIGINAL VERSION IS IN ITALIAN LANGUAGE
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.
This informations may be modified or integrated for technical and / or commercial requirements.

ENGLISH - 2/8
MI00488-1-EN

Dimensions (L×H×W)
17,5 x 102,5 x 111 mm
Weight
140 g.
Case
Material PA6, Black color.
13 14 15 16
910 1112
111 mm
102,5 mm
13 14 15 16
1 2 34
5 6 78
910 1112
17,5 mm
MODULE LAYOUT
Thermocouples measurement type: J, K, E, N, S, R, B, T.
μMeasurement available in the following sizes: Voltage ( V) or Temperature (°C, °F, °K)
on Integer 16 bit and Floating-point 32 bit, direct o swapped.
High acquisition speed.
Protection against electrostatic discharge (ESD) up to 4 kV.
Programmable value in case of fault or freezing of last measurement.
Easy power supply and serial bus wiring by means of the Seneca Z-BUS housed in the DIN rail.
2 Removable screw terminals for section Max. 1.5 mm cable.
DIP switches configurable or software configurable communication parameters.
RS485 Serial communication with MODBUS-RTU protocol.
Frontal USB Port for MODBUS-RTU configuration and communication.
Channels individually activable and configurable in pairs.
For the two inputs of each terminal group, the following common settings are available:
Measurement adjustable for temperature or mV.
Programmable filter for reading stabilization.
Rejection programmable at 50 Hz or 60 Hz.
Three configurable acquisition speeds (two 14-bit and one 15-bit).
Integrated cold-junction compensation.
GENERAL CHARACTERISTICS
Z-8TC-1 is a digital converter for thermocouples, with 8 measurement channels, collected into 4
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

ENGLISH - 3/8

Power supply
RS485
MODBUS
Communicat.
1500 V
1211
10
9
8
7
5
6
2
4
3
1
Input
TC
IDC10
IDC10
Input
TC
Input
TC
Input
TC
16
151413
STANDARDS
EN61000-6-4 Electromagnetic emission, industrial environment
EN61000-6-2 Electromagnetic immunity, industrial environment
EN61010-1 Safety
INSULATION
ENVIRONMENTAL COND.
Temperature
Humidity
Altitude
Storage temperature
Protection degree
-20 – +65°C. – EEPROM storing guaranteed in the range: 0 50 °C.
30% – 90% not condensing
Up to 2000 m a.s.l.
-20 + 85°C
–
IP20
MOUNTING
IEC EN60715 DIN Rail
CONNECTIONS
Removable 4-way terminals 2 , 3.5 mm pitch, for cable max. 1.5mm .
Rear IDC10 connector for CEI EN60715 rail
Micro USB frontal panel connector.
POWER SUPPLY
Tension
Power absorbed
10 – 40 V or 19 – 28 V  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
Thermocouple, internal communication error.
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
MI00488-1-EN

ENGLISH - 4/8

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-1
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
MI00488-1-EN

ENGLISH - 5/8

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 ● MODBUS table).
-Drop Length: maximum length of a drop line (see ● MODBUS table).
MODBUS CONNECTION STANDARDS
89
7
11 12
10
1 2 34
5 6 78
9 10 11 12
1314 15 16
Pic. 2
89
7
11 12
10
1 2 34
5 6 78
9 10 11 12
1314 15 16
Pic. 1
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 its
The 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
MI00488-1-EN

ENGLISH - 6/8

Power supply
Power supply
19 – 28V 50 – 60 Hz
10 – 40V 0.6 W Max
IDC10
 POWER 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.
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.
 USB
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 Pic.3 and Pic.4 show how to
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
Terminator Terminator
Bus Length
DL: Derivation Length
 MODBUS
Bus length
Derivation Length
Baudrate
1200 m
2 m
115 kbps
In order to obtain maximum performances it’s
recommended to use a specific shielded cable, as
an example BELDEN 9841.
MODBUS CONNECTION STANDARDS
MI00488-1-E

ENGLISH - 7/8

 INPUT 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 the threshold T is detected, both filters are forced to adapt rapidly to
the new value, stabilising it only later on. The value of the voltage threshold is fixed about 0,75 mV.
are available inside
Detailed information about filter settings the USER MANUAL in the REGISTER
MODBUS section.
 SOFTWARE CONFIGURATIONS
The EASY SETUP configuration software, allows the parameter setting.
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 USER MANUAL.
MODBUS REGISTERS
*
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
*
*
+ + -- + + --
AB
GND
109
RS485
IDC10
7 8
 RS485
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
 8 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
channels of different terminal blocks.
ELECTRICAL CONNECTIONS
MI00488-1-E

ENGLISH - 8/8

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
 DEFAULT CONDITION FOR THE CONFIGURATION PARAMETERS OF THE MODULE
The instrument is configured from the factory with All DIP-switches at OFF position
RS485 MODBUS protocol comunication parameters:
38400, 8,N,1 Addr. 1
 DEFAULT INPUT CONDITIONS FOR CHANNEL GROUPS OF THE MODULE
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
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.
SW1
BAUD RATE
SW1
ADDRESS
SW1
TERMINATOR
1 2
3 4 5 6 7 8
9 10

9600

# 1
x 
DISABLED

19200

# 2
x 
ENABLED

38400
. . . . . . . . .
#. .

ON

57600

# 63

FROM
EEPROM

FROM
EEPROM

OFF
x
Not Used
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.
CONFIGURATIONS
MI00488-1-E