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RS485 MODBUS Module 8AI

User Manual

2.2.  Technical Specifications

Power Supply

Voltage

10-38VDC; 20-28VAC 

Maximum Current

70 mA @ 12V / 38 mA @ 24V

Inputs 

No of inputs

2

Voltage input

-10V to 10V 

Current input

-20mA to 20mA 

Measurement resolution

16 bits

ADC processing time

70ms / channel

Voltage measurement error

Max 

±1.7%

 

Current measurement error

Max 

±0.1%

 

Digital outputs

Maximum current and voltage

250mA / 50V

Temperature

Work

-20 °C - +65°C

Storage

-40 °C - +85°C

Connectors

Power Supply

2 pin

Communication

3 pin

Inputs & Outputs

2 x 3 pin

Configuration

Mini USB

Size

Height

90 mm

Length

56 mm

Width

17 mm

Interface

RS485

Up to 128 devices

Expansion Module  – 1 analog input, 1 digital output

User Manual

Version 1.3

4 / 12

Summary of Contents for Mini Modbus 1AI

Page 1: ...Mini Modbus 1AI Expansion Module 1 analog input 1 digital output Version 1 3 User Manual Manufactured for...

Page 2: ...ncurring any liability for the purposes of commercial law This information does not release you from the obligation of own judgement and verification We reserve the right to change product specificati...

Page 3: ...age measurement and 1 input for current measurement both inputs can be used in this same time In addition the module is equipped with 1 configurable digital output PNP or NPN type This module is conne...

Page 4: ...processing time 70ms channel Voltage measurement error Max 1 7 Current measurement error Max 0 1 Digital outputs Maximum current and voltage 250mA 50V Temperature Work 20 C 65 C Storage 40 C 85 C Conn...

Page 5: ...ould be taken at the installation stage to prevent these effects These protective steps include control cabinet grounding module grounding cable shield grounding protective elements for electromagneti...

Page 6: ...3 30001 Input Registers Registered Read 3 4 40001 Output Registers Registered Read Write 4 6 16 3 4 Communication settings The data stored in the modules memory are in 16 bit registers Access to regi...

Page 7: ...bit 2 two stop bits 40004 3 0x03 Data Bits MSB 7 7 data bits 8 8 data bits 40006 5 0x05 Response delay Time in ms 40007 6 0x06 Modbus Mode 0 RTU 1 ASCII 4 Indicators Indicator Description ON LED indi...

Page 8: ...5 MODBUS Module 8AI User Manual 5 Block diagram 6 Module Connection Expansion Module 1 analog input 1 digital output User Manual Version 1 3 8 12 MUX ADC VIN IIN 100 COM V OUT C RS485 VCC GND GND 485...

Page 9: ...igital output 30053 52 0x34 Voltage Read Voltage in V 30054 53 0x35 Current Read Current in A or 30055 54 0x36 Alarm max voltage Read Write Maximum value of voltage excess which causes set bit no 1 in...

Page 10: ...arm hysteresis Read Write Hysteresis for alarm 7 2 Bit access Modbus Address Dec Address Hex Address Register name Access Description 801 800 0x320 Voltage input Read Voltage input state 802 801 0x321...

Page 11: ...ent value of other registers of the module This program can be a convenient way to test the system as well as to observe real time changes in the registers Communication with the module is done via th...

Page 12: ...5 3 3 Types of Modbus Registers 6 3 4 Communication settings 6 3 4 1 Default settings 6 3 4 2 Configuration registers 7 4 Indicators 7 5 Block diagram 8 6 Module Connection 8 7 Modules Registers 9 7...

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