Seneca Z-SG User manual

INSTALLATION MANUAL
Z-SG / Z-SG2
Strain Gauge converter
SENECA s.r.l.
Via Austria, 26 – 35127 – PADOVA – ITALY
Tel. [phone] - Fax [phone]
For manuals in other languages and the conguration software, visit www.seneca.it/products/z-sg
or www.seneca.it/products/z-sg2
EN
MI00532-0-E 1/8

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
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 might damage the
instrument or the 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
qualied electricians. Specic documentation is available at www.seneca.it/products/z-sg2
Important: Obstructing ventilation slots with any object is prohibited.
Installing the module next to devices that generate heat is prohibited.
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
electrostatic discharges. Take appropriate measures during any operation.
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
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ATTENTION: for further information regarding register settings or other details, refer to the USER MANUAL downloadable
from www.seneca.it/products/z-sg2

TECHNICAL SPECIFICATIONS
STANDARDS
EN61000-6-4 Electromagnetic emissions, industrial environment.
EN61000-6-2 Electromagnetic immunity, industrial environment.
EN61010-1 Safety
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
ANALOGUE
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
ANALOGUE
OUTPUT
Voltage output: Congurable between 0 - 10 Vdc, minimum load resistance 2 kΩ
Current input: Congurable between 0 - 20 mA, maximum load resistance: 500 Ω
Retransmission error: 0.1 % of maximum eld
Response time ( 10%..90%): 5 ms
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
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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)

SETTING THE SW1 DIP-SWITCHES: Z-SG / Z-SG2 VERSION
DESCRIPTION OF COMMON FUNCTIONS
• Power supply and serial connection wiring facilitated by means of a bus housed in the DIN rail.
• Communication can be congured 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.
• Analogue output in voltage or current, with programmable limits.
• Cell calibration with sample weight, not required in case of known cell sensitivity.
• Congurable 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 congurability with dedicated EASY SETUP software.
• Cell calibration and conguration using Easy Setup software.
• Congurable resolution (max, auto, customized).
• Sampling frequency can be set from 5.4 Hz to 1365.3 Hz.
• Alarm can be activated when a set threshold is exceeded.
• Measurement that can be stabilized by means of a special noise lter.
• Available sizes in both integer and oating point.
• Piece counting function
• Upgradeable rmware.
• Min/max values of the net weight
• Automatic tare reset
DESCRIPTION OF FUNCTIONS DEDICATED TO THE Z-SG2 INSTRUMENT
The position of the DIP-switches denes the Modbus communication parameters of the module: Address and Baud Rate
The following table shows the values of the Baud Rate and the Address according to the setting of the DIP-switches:
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 Z-SG / Z-SG2 VERSION
Status of the SW3 dip-switches
SW3 POSITION SW3 POSITION
1
RS485 terminator
2
GND interruption
Note 1:The RS485 line must be terminated only at the
ends of the communication line.
Note 2: Since the GND terminal of the RS485 port and the
negative terminal of the analogue output are not isolated
from each other, in order to use the analogue outputs
of several instruments 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). 4/8

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).
For maximum performance, it is recommended to use special shielded cables, such as BELDEN 9841.
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SETTING THE SW2 DIP-SWITCHES: Z-SG VERSION
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
45METHOD 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)
678CELL 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.
1200 m 2 m
21
4
5
Ld
Bus length Derivation length
Module Module
Module
Module
Module 3
Bus length
Ld= derivation length
Diagram 1

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).
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(*) 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 dened by the MODBUS protocol. It has a
micro USB connector on the front panel and can be congured using applications and/or software programs. The
USB communication has priority over the RS485 communication.
The USB serial port uses the following communication parameters: 2400,8,N,1 (Z-SG) / 3800,8,N,1 (Z-SG2) .
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
conguration and calibration of the load cell. For more information, visit www.seneca.it/products/z-sg or
www.seneca.it/products/sg2.
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.
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 side of the IDC10 rear connector.
Insertion on the
DIN rail
DIN rail
CU MICR TG-A CU MICROB-A-
CU MICROB-A-
*
--
O
Android APP
conguration
PC software
conguration
MODULE

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+ Signal - Signal
- Excitation
+ Sense
+ Excitation
7
8
912
10
11
- Sense
+ Signal - Signal
+ Excitation
7
8
912
10
11
- 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
6
1+
24 Vdc
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:
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 2.5 max
permissible value must be installed in the power supply line.
+
4
5
+
4
5
Output
The module provides a retransmitted voltage (congurable in the 0 - 10 Vac
range) or current (congurable in the 0 - 20 mA, range) output. For the electrical
connections, screened cables are recommended.
-Vac/Vdc
+ Vac/Vdc
1
2
Digital Input Digital Output
4-wire measurement 6-wire measurement
current
output
voltage
output

ACCESSORIES
CODE DESCRIPTION
CU-A-MICROB USM - micro USB 1 metre communication cable
CU-A-MICRO-OTG Mobile phone adapter cable
Z-PC-DINAL2-17.5 Quick t support for DIN rail - HEAD + 2 SLOT P = 17.5 mm
Z-PC-DIN2-17.5 Quick t support for DIN rail - 2 SLOT P = 17.5 mm
Z-PC-DIN8-17.5 Quick t support for DIN rail - 8 SLOT P = 17.5 mm
SG-EQ4 Equalization and connection system for load cells
CONTACT INFORMATION
Technical support [email protected] Product information [email protected]
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 modied or supplemented for technical and/or sales purposes.
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CONFIGURATION OF FACTORY SETTINGS
All DIP-switches in OFF position
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 congurable) (Z-SG)
38400 8, N, 1 Address 1 (not congurable) (Z-SG)
FIRMWARE UPDATE MODE (ONLY FOR Z-SG2 VERSION)
To bring the device in Firmware update mode, follow the procedure below:
1) Remove power from the device
2) Keep the side button pressed
3) Power the device keeping the side device pressed
4) Wait a few seconds
5) Release the side button
To exit the rmware update mode and return to the normal device operation, just:
1) Turn off the device
2) Power the device without pressing the side button
ATTENTION
The upper power supply limits must not be exceeded, as this might cause serious damage to the module. Switch
the module off before connecting inputs and outputs.
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...).
• Make sure that the power supply voltage to the module does not exceed: 40 Vdc or 28 Vac, otherwise the
module will be damaged.