Seneca Z-SG User manual
MI00532-3-EN INSTALLATION MANUAL 1/7
INSTALLATION MANUAL
SENECA s.r.l.; Via Austria, 26 – 35127 – PADOVA – ITALY; Tel. +39.049.8705359 - Fax +39.049.8706287
PRELIMINARY WARNINGS
The word WARNING preceded by the symbol indicates conditions or actions that put the user's safety at risk.
The word ATTENTION preceded by the symbol indicates conditions or actions that could damage the
instrument or connected equipment.
The warranty shall become null and void in the event of improper use or tampering with the module or devices
supplied by the manufacturer as necessary for its correct operation, and if the instructions contained in this manual
are not followed.
WARNING: The full content of this manual must be read before any operation. The module must only be used by
qualied electricians. Specic documentation is available using the QR-CODE shown on page 1.
Electrical and electronic waste disposal (applicable in the European Union and other countries with recycling). The
symbol on the product or its packaging shows the product must be surrendered to a collection centre authorized to
recycle electrical and electronic waste.
The module must be repaired and damaged parts replaced by the Manufacturer. The product is sensitive to electro-
static discharges. Take appropriate measures during any operation.
CONTACT INFORMATION
This document is the property of SENECA srl. Copies and reproduction are prohibited unless authorised.
The content of this document corresponds to the described products and technologies.
Stated data may be modied or supplemented for technical and/or sales purposes.
Z-SG
DOCUMENTATION
Z-SG
MI00532-3-EN INSTALLATION MANUAL 2/7
MODULE LAYOUT
Dimensions LxHxD 17.5 x 102.5 x 111 mm; Weight: 110 g; Enclosure: PA6, black
17.5 mm 111 mm
102.5 mm
LED STATUS LED meaning
PWR Green ON The device is powered correctly
FAIL yellow On Faulty
RX Red Flashing Receipt of packet completed
RX Red ON Anomaly / Check connection
TX Red Flashing Transmission of packet completed
SIGNALS VIA LED ON FRONT PANEL
FUNCTIONS DESCRIPTION
• Power supply and serial connection wiring facilitated by means of a bus housed in the DIN rail.
• Communication can be congured by DIP-switch or software.
• RS485 serial communication or via USB with MODBUS-RTU protocol.
• Protection against ESD discharges up to 4 kV.
• 1500 Vac insulation: between input and all other circuits, between communication and power supply and
between retransmitted output and power supply.
• Analog output in voltage or current, with programmable limits.
• Cell calibration with sample weight, not required in case of known cell sensitivity.
• Congurable digital I/O.
• Rejection at 50 Hz and 60 Hz.
• Stable weighing signal via digital output/Modbus register.
• Remote tare writing in volatile and/or non-volatile memory via digital input/Modbus register
• Strain gauge directly powered by the instrument.
• Ratiometric measurement.
• Sensitivity from ± 1 to ± 64 mV/V.
• Complete congurability with dedicated EASY SETUP software.
• Cell calibration and conguration using Easy Setup software.
MI00532-3-EN INSTALLATION MANUAL 3/7
TECHNICAL SPECIFICATIONS
CERTIFICATIONS
INSULATION
ENVIRONMENTAL
CONDITIONS
Temperature: -10
÷
+ 65°C
Humidity: 30%
÷
90% non condensing.
Altitude: Up to 2000 m above sea level
Storage temperature: -20
÷
+ 85°
Protection degree: IP20.
ASSEMBLY IEC EN60715, 35mm DIN rail in vertical position.
CONNECTIONS
3-way removable screw terminals, pitch 5 mm
Rear connector IDC10 for DIN bar 46277
front micro USB
POWER SUPPLY Voltage: 10
÷
40 Vdc; 19
÷
28 Vac 50
÷
60 Hz
Absorption: Typical: 1.5 W @ 24Vdc, Max: 2 W
ANALOG
INPUT
Input type: 4- or 6-wire differential measurement input
Input impedance: > 1 MΩ
Full scale: ± 10 mV / ± 320 mV
Error: 0.01% of the electrical full scale in “factory calibration” mode *
Thermal stability: 0.0025%/C° of full scale.
Insulation: 1500 Vac three-ways
COMMUNICATION
Serial communication ports:
RS485, 2400 - 115200 Baud / USB 38400 Baud
Address: 01, parity: NO, Data: 8 Stop bits: 1
Protocol: Modbus Rtu
LOAD
CHARACTERISTICS
Supply voltage: 5 Vdc
Minimum impedance: 87 Ω equivalent (possibly deriving from several load cells)
Sensitivity: From ±1 mV/V to ±64 mV/V
Load cells: 4 or 6 wires
ANALOG
OUTPUT
Voltage output: Congurable between 0
÷
10 Vdc, minimum load resistance 2 kΩ
Current input: Congurable between 0
÷
20mA, maximum load resistance: 500 Ω
Retransmission error: 0.1 % of maximum eld
Response time (10%..90%): 5ms
DIGITAL
IN/OUT
Opto-insulated digital input: Min. voltage: 12 V / Max. voltage: 30 V
Opto-insulated digital input: Min. current: 50 mA / Max. voltage: 30 V
OTHER
SPECIFICATIONS
Input type: 4- or 6-wire differential measurement input
Input impedance: > 1 MΩ
Full scale: ± 10 mV / ± 320 mV
WARNING
the maximum working voltage between
any terminal and ground must be less than
50 Vac / 75Vdc
Communication
Power
Supply
Input Output
1500 V~
10..40Vdc/19..28Vac
mA / V
RS485
ModBUS
USB
* In the case of “calibration with sample weight” mode, the accuracy is given by the linearity error (0.003% of the
electric full scale)
MI00532-3-EN INSTALLATION MANUAL 4/7
SETTING THE SW2 DIP-SWITCHES
SW2 DIP-SWITCH SETTING
1DIGITAL I/O TYPE + CALIBRATION BUTTON ENABLING
Selects digital input. Enables calibration button
Selects digital output
23OUTPUT
0 - 10 V
0 - 5 V
0 - 20 mA
4 - 20 mA
4 5 METHOD OF USE/CALIBRATION
Selects how to use 2 and 4
Selects how to use 1 and 3
Acquisition of the tare value via button or Digital input (2 and 4)
Manual cell calibration mode (1 and 3)
678 CELL SENSITIVITY
± 1 mV/V
± 2 mV/V
± 4 mV/V
± 8 mV/V
± 16 mV/V
± 32 mV/V
Sensitivity from ModBus register SENSE_RATIO (40044). Real non-integer values can also be set.
SETTING THE SW1 DIP-SWITCHES:
The position of the DIP-switches denes the Modbus communication parameters of the module: Address and Baud Rate
The following table shows the Baud Rate and Address values according to the DIP-switch setting:
DIP-Switch status
SW1 POSITION BAUD
RATE
SW1 POSITION
ADDRESS
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
9600 #1
19200 #2
38400 #...
57600 #63
From
EEPROM
From
EEPROM
Note: When DIP switches 3 to 8 are
OFF, the communication settings are
taken from programming (EEPROM).
SETTING THE SW3 DIP-SWITCHES
Note 1: Since the GND terminal of the RS485 port and the
negative terminal of the analog output are not isolated from
each other, in order to use the analog outputs of several in-
struments simultaneously and connected to each other via the
RS485 port, it is necessary to disconnect the GND terminal of
the RS485 port via the dedicated dip-switch (SW3).
Note 2: The RS485 line must be terminated only at the ends
of the communication line.
Status of the SW3 dip-switches
SW3 POSITION SW3 POSITION
1Mass RS485
Connected
Disconnected
2RS485 terminator
On
Off
MI00532-3-EN INSTALLATION MANUAL 5/7
ModBUS CONNECTION RULES
1) Install the modules in the DIN rail (120 max)
2) Connect the remote modules using cables of an appropriate length. The following table shows cable length data:
-Bus length: maximum length of the Modbus network according to the Baud Rate. This is the length of the cables
that connect the two farthest modules (see Diagram 1).
-Derivation length: maximum length of a derivation 2 m (see Diagram 1).
Lunghezza
bus
Lunghezza
derivazione
1200 m 2 m
Schema 1
Modulo 2Modulo 1
Modulo 3
Modulo 4
Modulo 5
Lunghezza del Bus
Ld= Lunghezza derivazione
Ld
For maximum performance, it is recommended to use special shielded cables, such as BELDEN 9841.
(*)
Check that the device in question is included in the list of products supported by the Easy Setup APP in the store.
USB PORT
The module is designed to exchange data according to the modes dened by the MODBUS protocol. It has a
micro USB connector on the front panel and can be congured using applications and/or software programs.
The USB communication has priority over the RS485 communication.
The USB serial port uses the following communication parameters: 2400 BAUD, 8BIT, NO PARITY, 1 STOP BIT, ModBUS
ADDRESS 1. The USB communication port responds exactly like the RS485 port with the exception of the
communication parameters. During the use of the USB port, the bus will be inactive; it will reactivate automatically
after disconnecting the USB port cable. EASY SETUP (for Windows systems) is the software to be used for the
conguration and calibration of the load cell.
For more information, visit www.seneca.it/prodotti/z-sg.
INSTALLATION REGULATIONS
The module has been designed for vertical installation on a DIN 46277 rail. For optimal operation and long life,
adequate ventilation must be provided. Avoid positioning ducting or other objects that obstruct the ventilation slots.
Avoid mounting modules over heat-generating equipment.
Installation in the bottom part of the electrical panel is recommended.
Guida DIN
MODULO
Inserimento nella
guida DIN
Insertion in the DIN rail
As shown in gure:
1. Insert the IDC10 rear connector of the module on a
free slot of the DIN rail
(the insertion is univocal since the connectors are
polarized).
2. To secure the module to the DIN rail, tighten the two
hooks on the sides of the IDC10 rear connector.
Bus
length
1200 m 2 m
Diagram 1
DL
Bus length
Ld= Derivation length
Derivation
length Module 1 Module 2
Module 3
Module 4
Module 5
Insertion in the
DIN rail
MODULE
DIN rail
MI00532-3-EN INSTALLATION MANUAL 6/7
ELECTRICAL CONNECTIONS
Power supply and Modbus interface are available using the Seneca DIN rail bus, via the IDC10 rear connector, or the
Z-PC-DINAL-17.5 accessory.
RS485GND
RS485A
RS485B
Power Supply AC / +
Power Supply AC / -
IDC 10
1
Back connector (IDC 10)
The illustration shows the meanings of the various
IDC10 connector pins if signals are to be sent via
them directly.
Power Supply AC
Ground
Power Supply AC
GNDSHLDG ND
CANL / BCANL / A
DIP SWITCH
(1230 Ohm terminator)
Z-PC-DINAL2-17.5 accessory use
If the Z-PC-DINAL2-17.5 accessory is used, signals
can be sent via terminal boards. The illustration
shows the meaning of the various terminals and
DIP-switch position (found in all supports for the DIN
rail listed in Accessories) for the termination of the
CAN network (not used for the Modbus network).
GNDSHLD:
Connection cable signal protection shield
(recommended).
CAUTION
The upper power supply limits must not be exceeded, as this could cause serious damage to the module.
To meet the electromagnetic immunity requirements:
• use shielded signal cables;
• connect the shield to a preferential instrumentation earth system;
• separate shielded cables from other cables used for power installations (inverters, motors, induction ovens, etc...).
Power supply
Terminals 2 and 3 can be used to provide the module with power supply as an
alternative to the connection using the Z-PC-DINx bus. The upper limits must
not be exceeded as this can seriously damage the module. If the power
supply source is not protected against overload, a safety fuse with a 2.5A max
permissible value must be installed in the power supply line.
Uscita in
Tensione +
4
5
Uscita in
Corrente
+
4
5
Output
The module provides a retransmitted voltage (congurable in the 0 - 10 Vac
range) or current (congurable in the 0 - 20 mA, range) output. For the electrical
connections, screened cables are recommended.
Vac/Vdc
Vac/Vdc
2
3
Voltage
output
Current
output
MI00532-3-EN INSTALLATION MANUAL 7/7
+ Signal - Signal
- Excitation
+ Sense
+ Excitation
7
8
912
10
11
- Sense
Misura a 6 fili
+ Signal - Signal
+ Excitation
7
8
912
10
11
Misura a 4 fili
- Excitation
Connection to the load cell via 4 or 6 wires:
The gure shows the connections to be made for a connection to a load cell. The terminals have the following
meaning:
7: Load cell positive supply
8: Load cell positive supply reading
9: Cell reading positive
10: Load cell negative supply
11: Load cell negative supply reading
12: Cell reading negative
For the connections, the use of screened cables is required.
1
6+
24 Vdc
Ingresso Digitale
6
1+
Usc ita Digitale
24 Vdc
Load
Digital input/output
Depending on the settings, it is possible to decide whether to have a digital output or input.
The connections in the two cases are shown below:
CONFIGURATION OF FACTORY SETTINGS
All DIP-switches in OFF
Communication parameters of ModBUS protocol: 38400 8, N, 1 Address 1
Communication parameters of micro USB front port 2400 8, N, 1 Address 1 (not congurable)
Digital input Digital output
4-WIRE MEASUREMENT 6-WIRE MEASUREMENT
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