Seneca Z-8AI User manual

INSTALLATION MANUAL
Z-8AI
Module with 8 voltage-current ANALOGUE INPUTS
with Modbus protocol on RS485
SENECA s.r.l.
Via Austria, 26 – 35127 – PADOVA – ITALY
Tel. [phone] - Fax [phone]
For manuals in other languages and the configuration software, visit www.seneca.it/products/z-8ai
MI00362-3-EN 1/8
EN

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 manu-
al are not followed.
WARNING: The full content of this manual must be read before any operation. The module must only be used by
qualified electricians. Specific documentation is available at www.seneca.it/products/z-8ai
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 electro-
static discharges. Take appropriate measures during any operation.
LED STATUS LED meaning
PWR Green ON The device is powered correctly
FAIL yellow Flashing Anomaly or fault
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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TECHNICAL SPECIFICATIONS
STANDARDS
EN61000-6-4 Electromagnetic emissions, industrial environment.
EN61000-6-2 Electromagnetic immunity, industrial environment.
EN61010-1 Safety
Note UL: use in environments with pollution degree 2 or lower. The power supply unit must
be class 2.
INSULATION
ENVIRONMEN-
TAL
CONDITIONS
Temperature: -20 – + 65°C (-10 - +55 °C UL)
Humidity: 30%– 90% non condensing.
Altitude: up to 2000 m above sea level
Storage temperature: -20 + 85°
Protection degree: IP20.
ASSEMBLY 35 mm DIN rail IEC EN60715 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: 3.5 W
INPUTS
Voltage input: Bipolar with F.S. programmable at +2 Vdc and +10 Vdc Input impedance >100 kOhm
Current input:Bipolar with F.S. Programmable at +20 mA with 50 Ohm internal shunt selectable via DIP-
switch. Available power supply: 90 + 90 mA at 13 Vdc.
Number of chan-
nels: 8
Input resolution: 15 bit + sign.
Input protection: ± 30 Vdc or 25 mA
Precision
voltage and
current:
Starting: 0.1 of full scale
Linearity : 0.03% of scale.
Zero: 0.05% of scale.
TC: 100 ppm, EMI: <1 %
Sampling
time 120 ms/channel or 60 ms/channel
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Power
Supply
Analog
Input
Comm.
1500 V~
mA / V
mA / V
mA / V
mA / V
mA / V
mA / V
mA / V
mA / V
RS485
WARNING
the maximum working voltage between any
terminal and ground must be less than 50
Vac / 75Vdc

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.
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 equipment generating heat. Installation in the bottom part of the switchboard is rec-
ommended.
Insertion in the DIN rail
As shown in figure:
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.
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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
Channel input from 1 to 8: VOLTAGE ± 10 Vdc
Numerical representation of the input measurement: ± 10000 mV
Sampling time: 120 ms
1200 m 2 m
21
4
5
Ld
Diagram 1
Bus length Derivation
length
Module Module
Module
Module
Module 3
Bus length
Ld= derivation length
Insertion on
the DIN rail MODULE
DIN rail

USB PORT
The module is designed to arrange data according to the modes defined by the MODBUS protocol. It has a micro
USB connector on the front panel and can be configured 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,1The 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 a few seconds after the last message exchanged
on the USB port. EASY SETUP is the software to use for the configuration. For more information, visit www.sene-
ca.it/products/z-8ai
Check that the device in question is included in the list of products supported by the Easy Setup APP in the store.
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CU MICROO TG-A-- CU MICROB-A-
CU MICROB-A-
Android APP
configuration
PC software
configuration

6/8
SETTING THE DIP-SWITCHES
The position of the DIP-switches defines 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 POSITION TERMINATOR
1 2 3 4 5 6 7 8 3 4 5 6 7 8 10
9600 #1 Disabled
19200 #2 Enabled
38400 #...
57600 #63
From
EEPROM
From
EEPROM
Note: When DIP switches 1 to 8 are OFF, the communication settings are taken from programming (EEPROM).
Note 2: The R S 485 line must be terminated only at the ends of the communication line.
SW2 ANALOGUE INPUTS
12345678 CHANNEL
CURRENT INPUT
VOLTAGE INPUT
Modbus registers: Holding registers
Register Name Description
40003 IN CH1 Channel measurement value with scale± 10000 normalised.
40004 IN CH2 Channel measurement value with scale± 10000 normalised.
40005 IN CH3 Channel measurement value with scale± 10000 normalised.
40006 IN CH4 Channel measurement value with scale± 10000 normalised.
40007 IN CH5 Channel measurement value with scale± 10000 normalised.
40008 IN CH6 Channel measurement value with scale± 10000 normalised.
40009 IN CH7 Channel measurement value with scale± 10000 normalised.
40010 IN CH8 Channel measurement value with scale± 10000 normalised.
LEGEND
ON
OFF
position
The settings of the dip-switches must be compatible with the settings on the registers. The description of the regis-
ters is available in the USER MANUAL.

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
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 (recom-
mended).
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INPUTS
A) Voltage input with sensor supply from the MODULE (13 Vdc)
B) Voltage input with sensor supply NOT coming from the MODULE
C) Current input with sensor supply NOT coming from the MODULE
D) Current input with sensor supply from the MODULE (13 Vdc)
E) Current input with sensor EXTERNAL power supply
#I 7n
#I 5n
#I 6n
#I 8n
#I 2n
#I 4n
#I 3n
gnd
#I 1n
gnd
++++
TX
TX
TX
TX
vext
TX
TX
TX
TX
+
ABCDE
S
S
S
S
+
+++
TX
TX
TX
TX
vext
TX
TX
TX
TX
+
S
S
S
S
vaux*
vaux
vaux
vaux
vaux
vaux*( generata dal modulo ) = 13 Vdc
vaux*

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 fit support for DIN rail - HEAD + 2 SLOT P = 17.5 mm
Z-PC-DIN2-17.5 Quick fit support for DIN rail - 2 SLOT P = 17.5 mm
Z-PC-DIN8-17.5 Quick fit support for DIN rail - 8 SLOT P = 17.5 mm
CONTACT INFORMATION
Technical support [email protected] Product information [email protected]
This document is 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 modified or supplemented for technical and/or sales purposes.
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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...).
• install a fuse with a MAX capacity of 2.5 A near the module.
• make sure that the power supply voltage to the module does not exceed: 40 Vdc or 28 Vac, otherwise the
module will be damaged.