Communication


The communication network is the backbone for any Control system and is required for various control devices to communicate with each other and to a central information centre capable of taking control actions, which could be either LAN or WAN.


Common Wired Communication:

  • RS232 (One-to-One): Its a single-ended full-duplex interface is used for short distances, maximum cable length - 50 feet
  • RS422 (1Tx-to-10Rx): Reducing common mode noise to enable data transmission over long distances in noisy industrial and factory automation environments, maximum cable length - 1650 feet.
  • RS485 (32Tx-to-32Rx): Similar to RS422 but have multiple commanding devices (Tx) and multiple receiving devices (Rx), maximum cable length - 650 feet.

Industrial Specific Protocol:

  • Serial: PROFIBUS, PROFINET, Modbus™ and CAN
  • Ethernet: EtherCAT, PROFINET, Modbus™ TCP/IP, Ethernet/IP and PowerLink

Data buses like Modbus and Profibus are no longer the de facto standard for industrial communications; both have been overtaken by Ethernet. Ethernet accommodates a wide range of applications, has become universally supported by communications equipment manufacturers and counts ease of configuration and low cost among its many advantages.


However, all the wired communications modes share one significant drawback with other: Cabling.


Wireless communication technologies address the cabling drawbacks of hardwired connections and offer many new possibilities in the industry for particularly flexible and efficient automation solutions. There are many different methods of wireless communication, based on the distance between the transmitting and receiving points. For example, Bluetooth and Wi-Fi for short distances, GSM or CDMA for longer distances.


The key requirement for the use of wireless technologies in industrial applications is that the technology must be as rugged and reliable as a cable connection, even under harsh conditions. The wireless connection is subject to interference, such as electromagnetic interference fields, which can adversely affect transmission.


  • ZigBee - used for simple applications with a low data rate, low power and low-cost requirements. It offers a diversity of channel selections over three bands: one in 868MHz, ten channels in 902-928MHz and sixteen available in the 2.4GHz ISM.

  • Bluetooth - operates in the 2.4GHz (ISM) band. Piconet is the basic unit of networking in Bluetooth. It is an ad-hoc network with one master and up to seven active slave nodes. Ultra-wideband technology is designed for applications which require a power-efficient, high bandwidth solution. UWB offers enormous bandwidth which enables it to tackle multipath and jamming issues.

  • WirelessHART and ISA100.11a protocol has become popular for communication in various types of field devices, such as flow-meter, level controllers with the PLC and Panel instruments. Both are well positioned to address the industrial needs especially because of the advanced security, channel hopping, TDMA and blacklist-based approach to guarantee real-time operations and reliability in an unprotected license-free radio spectrum.

  • Industrial wireless Ethernet is suitable for integration in processes that use data or for SCADA and PLC applications. They transmit distributed Ethernet and analogue, serial or digital I/O data to IP-based networks. It can support all common IP protocols, such as Modbus TCP, PROFINET or EtherNet/IP.

To learn more about Wireless Technologies Click Here


Return to main Industrial Automation Control page

Videos

Engineer It - How to isolate a power supply for RS485 & CAN

Bluetooth Low Energy Demonstration Kit (STEVAL-IDB002V1)

Getting started with Wi-Fi expansion board

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RN4020-V/RM
RN4020-V/RM - Bluetooth® Low Energy v4.1 Module, 2.4 to 2.48GHz, 1MBPS

2442930

MICROCHIP

Bluetooth® Low Energy v4.1 Module, 2.4 to 2.48GHz, 1MBPS

BLUETOOTH, VER 4.1, 2.4-2.48GHZ, 1MBPS; Bluetooth Version:Bluetooth 4.1; Supply Voltage Min:1.8V; Supply Voltage Max:3.6V; Signal Range Max:100m; Data Rate:1Mbps; Bluetooth Class:-; Receive Sensitivity:-92.5dBm; Operating Temperature Min:-30°C; Operating

420 in stock

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    ETRX357HR-LRS
    ETRX357HR-LRS - Zigbee Module, Em357, 2.4Ghz, U.Fl Connector

    1854237

    SILICON LABS

    Zigbee Module, Em357, 2.4Ghz, U.Fl Connector

    ZIGBEE MOD, EM357, 2.4GHZ, U.FL CONN; Module Applications:-; MCU Supported Families:-; Wireless Protocol:-; Data Rate:-; Module Interface:-; Supply Voltage Min:-; Supply Voltage Max:-; Product Range:-; SVHC:No SVHC (15-Jun-2015)

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    XP1001000-05R
    XP1001000-05R - XPort® Embedded Device Server Module

    2115259

    LANTRONIX

    XPort® Embedded Device Server Module

    MODULE, SERIAL TO ETHERNET, XPORT; Module Applications:Industrial, Home Projects; Data Rate:921.6Kbps; Module Interface:Serial; Product Range:XPort embedded; Applications:Web Based Application; Processor Type:DSTni-EX

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    CYBLE-014008-00
    CYBLE-014008-00 - PSoC® Module, Bluetooth® v4.1 Low Energy Module, 2.4GHz, Single Mode

    2646427

    CYPRESS SEMICONDUCTOR

    PSoC® Module, Bluetooth® v4.1 Low Energy Module, 2.4GHz, Single Mode

    BLE MODULE, V.4.1, 2.4GHZ, SINGLE MODE; Bluetooth Version:Bluetooth 4.1; Supply Voltage Min:1.71V; Supply Voltage Max:5.5V; Signal Range Max:-; Data Rate:1Mbps; Bluetooth Class:-; Receive Sensitivity:-87dBm; Operating Temperature Min:-40°C; Operating Tem

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    RN171XVS-I/RM
    RN171XVS-I/RM - Wireless LAN Module, 802.11 b/g, On-board TCP/IP Stack, Reverse Polarity SMA Connector

    2144012

    MICROCHIP

    Wireless LAN Module, 802.11 b/g, On-board TCP/IP Stack, Reverse Polarity SMA Connector

    MODULE, WIFI, 802.15.4 DROP-IN; Frequency RF:2.48MHz; Module Interface:UART; Module Applications:Wireless Connectivity; Product Range:-; SVHC:No SVHC (15-Jan-2018); Compliance Standard:CE, FCC, IC; Transmit Power:12dBm

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    ENW89846A1KF
    ENW89846A1KF - Class 2 Single Mode Bluetooth® v4 Smart Module, 16MHz and 32.768kHz Crystal

    2449320

    PANASONIC

    Class 2 Single Mode Bluetooth® v4 Smart Module, 16MHz and 32.768kHz Crystal

    BLUETOOTH SMART, VERSION4, PAN1740; Bluetooth Version:Bluetooth 4.2; Supply Voltage Min:2.35V; Supply Voltage Max:3.3V; Signal Range Max:100m; Data Rate:1Mbps; Bluetooth Class:-; Receive Sensitivity:-93dBm; Operating Temperature Min:-40°C; Operating Temp

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    RN41-I/RM
    RN41-I/RM - Class 1 Bluetooth® Radio Module with Integrated Ceramic RF Chip Antenna

    2143311

    MICROCHIP

    Class 1 Bluetooth® Radio Module with Integrated Ceramic RF Chip Antenna

    MODULE, BLUETOOTH CLASS 1, ANTENNA; Bluetooth Version:Bluetooth 2.1 + EDR; Supply Voltage Min:3V; Supply Voltage Max:3.6V; Signal Range Max:100m; Data Rate:921Kbps; Bluetooth Class:Class 1; Receive Sensitivity:-80dBm; Operating Temperature Min:-40°C; Ope

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    BLE112-A-V1
    BLE112-A-V1 - Class 2 Bluetooth® Low Energy Module with Integrated Chip Antenna and Software Version 1.0

    2113858

    SILICON LABS

    Class 2 Bluetooth® Low Energy Module with Integrated Chip Antenna and Software Version 1.0

    BLUETOOTH MODULE, CLASS 2, CHIP ANT; Bluetooth Version:Bluetooth 4.0; Supply Voltage Min:2V; Supply Voltage Max:3.6V; Signal Range Max:150m; Data Rate:100Kbps; Bluetooth Class:Class 2; Receive Sensitivity:-97dBm; Operating Temperature Min:-40°C; Operatin

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    CYBLE-012012-10
    CYBLE-012012-10 - PROC™ Module, Bluetooth® v4.1 Low Energy (BLE) Wireless Solution, 2.4GHz, Single Mode

    2646426

    CYPRESS SEMICONDUCTOR

    PROC™ Module, Bluetooth® v4.1 Low Energy (BLE) Wireless Solution, 2.4GHz, Single Mode

    BLE MODULE, V.4.1, 2.4GHZ, SINGLE MODE; Bluetooth Version:Bluetooth 4.1; Supply Voltage Min:1.8V; Supply Voltage Max:5.5V; Signal Range Max:-; Data Rate:1Mbps; Bluetooth Class:-; Receive Sensitivity:-87dBm; Operating Temperature Min:-40°C; Operating Temp

    366 in stock

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    RN4677-V/RM100
    RN4677-V/RM100 - Bluetooth® Dual Mode v4.0 Module, (BR/EDR/LE), 2.402 to 2.48GHz

    2491387

    MICROCHIP

    Bluetooth® Dual Mode v4.0 Module, (BR/EDR/LE), 2.402 to 2.48GHz

    BLUETOOTH, VERSION4.0+EDR, 2.402-2.48GHZ; Bluetooth Version:Bluetooth 4.0 + EDR; Supply Voltage Min:3.2V; Supply Voltage Max:4.3V; Signal Range Max:10m; Data Rate:50Kbps; Bluetooth Class:Class 2; Receive Sensitivity:-90dBm; Operating Temperature Min:-20°

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    CYBLE-212019-00
    CYBLE-212019-00 - PROC™ Module, Bluetooth® v4.1 Low Energy (BLE) Wireless Solution, 1MBPS, 1.8 to 5.5V

    2674187

    CYPRESS SEMICONDUCTOR

    PROC™ Module, Bluetooth® v4.1 Low Energy (BLE) Wireless Solution, 1MBPS, 1.8 to 5.5V

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    ETRX357
    ETRX357 - Zigbee Module, Em357, AMR, M2M, 250Kbps

    1854234

    SILICON LABS

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    ZIGBEE MOD, EM357, AMR, M2M, 250KBPS; Module Applications:RF Communications, Wireless Connectivity-ZigBee; MCU Supported Families:ARM Cortex-M3; Wireless Protocol:IEEE 802.15.4; Data Rate:250Kbps; Module Interface:Serial; Supply Voltage Min:2.1V; Supply

    Available for back order

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    CYBLE-022001-00
    CYBLE-022001-00 - PSoC® Module, Bluetooth® v4.1 Low Energy Communication, 2.4GHz, Single Mode

    2646429

    CYPRESS SEMICONDUCTOR

    PSoC® Module, Bluetooth® v4.1 Low Energy Communication, 2.4GHz, Single Mode

    BLE MODULE, V.4.1, 2.4GHZ, SINGLE MODE; Bluetooth Version:Bluetooth 4.1; Supply Voltage Min:1.8V; Supply Voltage Max:5.5V; Signal Range Max:100m; Data Rate:1Mbps; Bluetooth Class:Class 2; Receive Sensitivity:-87dBm; Operating Temperature Min:-40°C; Opera

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    LM006
    LM006 - Wi-Fi 150Mbps micro USB Adapter, Convenient Plug & Play USB 2.0 Solution for Wireless Networking

    1790361

    LM TECHNOLOGIES

    Wi-Fi 150Mbps micro USB Adapter, Convenient Plug & Play USB 2.0 Solution for Wireless Networking

    WIFI USB NANO ADAPTOR, 150MBPS, 802.11N; Frequency RF:-; Module Interface:-; Module Applications:-; Product Range:-; SVHC:No SVHC (17-Dec-2015)

    No Longer Stocked

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    ENW89823A2KF
    ENW89823A2KF - Easy to Use Bluetooth® RF Module, CC2564 IC, 2.4GHz

    2325982

    PANASONIC

    Easy to Use Bluetooth® RF Module, CC2564 IC, 2.4GHz

    RF MOD, TXRX, BLUETOOTH, PAN1326-HCI-85; Bluetooth Version:Bluetooth 4.0 + EDR; Supply Voltage Min:1.7V; Supply Voltage Max:4.8V; Signal Range Max:-; Data Rate:4Mbps; Bluetooth Class:-; Receive Sensitivity:-93dBm; Operating Temperature Min:-40°C; Operati

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    ENW89823C2KF
    ENW89823C2KF - PAN1316 Bluetooth® v4.0 RF Module

    2325978

    PANASONIC

    PAN1316 Bluetooth® v4.0 RF Module

    RF MOD, TXRX, BLUETOOTH, PAN1316-HCI-85; Bluetooth Version:Bluetooth 4.0 + EDR; Supply Voltage Min:1.7V; Supply Voltage Max:4.8V; Signal Range Max:-; Data Rate:4Mbps; Bluetooth Class:-; Receive Sensitivity:-93dBm; Operating Temperature Min:-40°C; Operati

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    JN5168-001-M00Z
    JN5168-001-M00Z - RF Module, IEEE802.15.4, Standard Power, Internal Antenna

    2341778

    NXP

    RF Module, IEEE802.15.4, Standard Power, Internal Antenna

    RF MOD, IEEE802.15.4, STD PWR, INT ANT; Module Applications:Asset Tracking, RF, Utilities Metering, Wireless Connectivity, ZigBee and JenNet-IP Networks; MCU Supported Families:JN516x; Wireless Protocol:IEEE 802.15.4; Data Rate:-; Module Interface:I2C, J

    No Longer Manufactured

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    XB24-AWI-001
    XB24-AWI-001 - RF Module, Transceiver, Xbee, Wire Antenna

    1337912

    DIGI INTERNATIONAL

    RF Module, Transceiver, Xbee, Wire Antenna

    RF MODULE, TXRX, XBEE, WIRE ANT; Module Applications:Wireless Connectivity; MCU Supported Families:XBee; Wireless Protocol:IEEE 802.15.4; Data Rate:250Kbps; Module Interface:Serial, UART; Supply Voltage Min:2.8V; Supply Voltage Max:3.4V; Product Range:XB

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    ENW89848A1KF
    ENW89848A1KF - Class 2 Bluetooth® Low Energy + NFC Single Mode Module, 2.402Mhz to 2.48Mhz, 40KBPS

    2664584

    PANASONIC

    Class 2 Bluetooth® Low Energy + NFC Single Mode Module, 2.402Mhz to 2.48Mhz, 40KBPS

    BLE+NFC, 2.402MHZ-2.48MHZ, 40KBPS; Bluetooth Version:Bluetooth 4.1; Supply Voltage Min:1.8V; Supply Voltage Max:3.6V; Signal Range Max:100m; Data Rate:-; Bluetooth Class:-; Receive Sensitivity:-90dBm; Operating Temperature Min:-40°C; Operating Temperatur

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    WT12-A-AI3
    WT12-A-AI3 - Class 2 Bluetooth® Module, WT12, iWRAP 3, Bluetooth® 2.1 + EDR

    1704779

    SILICON LABS

    Class 2 Bluetooth® Module, WT12, iWRAP 3, Bluetooth® 2.1 + EDR

    BLUETOOTH MODULE, WT12, IWRAP 3; Bluetooth Version:Bluetooth 2.1 + EDR; Supply Voltage Min:3.2V; Supply Voltage Max:3.4V; Signal Range Max:30m; Data Rate:3Mbps; Bluetooth Class:Class 2; Receive Sensitivity:-84dBm; Operating Temperature Min:-40°C; Operati

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    SIP-0P5WRS301
    SIP-0P5WRS301 - Wi-Fi Module, Samsung ARTIK™ 053 Module, 32-Bit ARM Cortex R4 MCU, On-Module Antenna

    2770348

    SAMSUNG ARTIK

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    ENW89847A1KF
    ENW89847A1KF - PAN1760 Series, Class 2 Low Energy Single Mode Bluetooth® v4.0 Module, 3.6V, 2.4GHz

    2565673

    PANASONIC

    PAN1760 Series, Class 2 Low Energy Single Mode Bluetooth® v4.0 Module, 3.6V, 2.4GHz

    BLUETOOTH, VERSION 4.0, 3.6V, 2.4GHZ; Bluetooth Version:Bluetooth 4.0; Supply Voltage Min:1.8V; Supply Voltage Max:3.6V; Signal Range Max:-; Data Rate:-; Bluetooth Class:-; Receive Sensitivity:-91dBm; Operating Temperature Min:-40°C; Operating Temperatur

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