Synapse RTU-DI8 Manual
  1. Manuals
  2. Brands
  3. Synapse Manuals
  4. Control Unit
  5. RTU-DI8
  6. Manual

Synapse RTU-DI8 Manual

8 channel digital in modbus rtu module
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
RTU-DI8 – 8 Channel Digital In
Modbus RTU Module
Documentation Issue 1.1 DRAFT

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the RTU-DI8 and is the answer not in the manual?

Questions and answers

Related Manuals for Synapse RTU-DI8

Summary of Contents for Synapse RTU-DI8

  • Page 1 RTU-DI8 – 8 Channel Digital In Modbus RTU Module Documentation Issue 1.1 DRAFT...
  • Page 2 Features  8 Channel Opto-Isolated Digital Inputs  Fast Opto-Coupler design capable of reading high speed pulses  Wide Voltage input range (5-48V)  Three modes of operation High/Low Level Mode Pulse Width Measurement Mode Pulse Count Mode  Software Modbus registers for Channel High/Low Level State Mode Channel 32bit Pulse Count totalizer (value also stored in Non-Volatile FRAM) Mode Channel 32bit Pulse Count Offset Value...

  • Page 3: Safety And Esd Precautions

    Safety and ESD Precautions Before first use, refer to this manual. Before first use, make sure that all cables are connected properly Please ensure proper working conditions, according to the device specifications e.g. Supply voltage, ambient temperature, maximum power consumption requirements.

  • Page 4: Specifications

    Specifications Voltage 6-28 VDC Power Supply Maximum Current 10mA @12V Max No of inputs 8 (AC or DC Inputs) Input Range (Voltage Mode) 0–48V Low Level 0 - 3V Digital Inputs High Level >= 5V 6.8 KΩ Input Resistor Operating Temperature -20°C to +70°C Environmental Conditions Storage Temperature...
  • Page 5 RTU Module Pin Out 1 – 0V 2 – DC IN 1 – TRIG 2 – 5V 3 – 0V 3 – 0V 2 – RS485 B 4 – 0V 1 – RS485 A 1 – CH1 + 8 – CH8 - 2 –...
  • Page 6 Status LEDs & Modbus ID Modbus Address ID Link Setting Status LEDs Bottom Green Power On Modbus Rx Modbus Tx Link No Address Setting Modbus Address +1 Modbus Address +2 Modbus Address +4 Modbus Address +8 Modbus Address +16 No Links Use factory defaults* * Factory Default setting : ...
  • Page 7 Modbus Address ID Selection Link Addr * Invokes Factory Default setting:  Address Id = 1  Baud Rate = 19200 8N1...

  • Page 8: Pulse Width Measurement Mode

    Pulse Width Measurement Mode The auxiliary pulse width measurement interface connector allows for the integration, and daisy chaining, of sensors which require a low 5V voltage power supply and/or trigger pulse in order to initiate conversion/pulse generation. The width/length of the received pulse is then measured and stored in the respective Modbus register.
  • Page 9 Ultrasonic Sensor Accessory Breakout Board The breakout board is configured such that each sensor triggers sequentially in the sequence 1-8, if using a smaller amount of sensors strictly use the 1-8 ordering for both the sensor plugs and the RTU channel ordering the so that the trigger signal propagates correctly and the matching pulse output is wired to the corresponding RTU digital input channel.
  • Page 10 RTU PWM Interface Plug Function RTU Trigger Pin J1/2/4/5/6/7/8/9 Maxbotix Sensor Plug Function Sensor Pulse Width Output Trigger Signal To Sensor (Input) Trigger Signal From Sensor (Output) RTU Sensor Plug Function Sensor 1 Output Pulse Sensor 2 Output Pulse Sensor 3 Output Pulse Sensor 4 Output Pulse Sensor 5 Output Pulse Sensor 6 Output Pulse...
  • Page 11 Pulse Counting Mode This operating mode puts the system into pulse count mode, where each channel will count the number of pulses received on a given input channel. The system features a user-definable de-bounce period, which is factory set to 10mS, allowing for pulses <100kHz.
  • Page 12 RS485 Bus Option Links Fit links below to enable the function shown 120Ω Termination Resistor RS485 Low Bus Pull RS485 High Bus Pull Important: Only one set of bus data line pulls should be active, either at the master side or on a single slave Important: Termination resistors should only be enabled at far ends of bus...

  • Page 13: Rs485 Bus Connection

    RS485 Bus Connection High Bus Pull 120Ω Termination 120Ω Termination RS485 A/+ Modbus Master RS485 B/- Low Bus Pull Module Module Module RTU Plug RS485 Wiring Belden 9481 (120Ω Cable) Shield – Only connect on one end of cable!
  • Page 14 Modbus Registers – Readings Register Type Read/Wite Description 40001 16bit (Big Endian) Read Only Channel 1 Static Level Reading 40002 16bit (Big Endian) Read Only Channel 2 Static Level Reading 40003 16bit (Big Endian) Read Only Channel 3 Static Level Reading 40004 16bit (Big Endian) Read Only...
  • Page 15 40073 32Bit (Big Endian) Read/Write Channel 1 PWM Min Peek Reading 40075 32Bit (Big Endian) Read/Write Channel 2 PWM Min Peek Reading 40077 32Bit (Big Endian) Read/Write Channel 3 PWM Min Peek Reading 40079 32Bit (Big Endian) Read/Write Channel 4 PWM Min Peek Reading 40081 32Bit (Big Endian) Read/Write...
  • Page 16 Modbus Registers – Configuration Register Type Read/Wite Description 40105 16bit (Big Endian) Read/Write Channel 1 Operating Mode 40106 16bit (Big Endian) Read/Write Channel 2 Operating Mode 40107 16bit (Big Endian) Read/Write Channel 3 Operating Mode 40108 16bit (Big Endian) Read/Write Channel 4 Operating Mode 40109 16bit (Big Endian) Read/Write...
  • Page 17 Register Value Setting Channel AOK Channel PWM Input Faulty 40121 Channel PWM Long/Short average Setting This value defines how many readings the PWM average is taken over. Default is 8 Register Value Setting 8 Readings 4 Readings 8 Readings 40122 Pulse Count De-bounce Setting Pulse Counting de-bounce period, this value in milliseconds (ms) gives the minimum gap between pulses before a new pulse is counted.
  • Page 18 19200 38400 57600 40124 – Configuration Register Writing 255 to this register will cause the system to save the current configuration and reboot the unit, this is required if any of the parameters have changed e.g. baud rate or channel resolution. Values between 880 and 888 will erase and zero out selective channels NVRAM storage for pulse count totals or erase and zero out totals for all channels.

  • Page 19: Software Support

    Software Support Open-Source code samples can be downloaded from the GitHub repositories below : RTU-DI8 Configuration Tool https://github.com/synapsertu/rtu-di8 Multi RTU module Logger https://github.com/synapsertu/rtu-log Modbus Utilities The following windows and Linux command line utilities are useful for development Windows/Linux x86 Binary https://www.modbusdriver.com/modpoll.html...

Table of Contents