Introduction & Differences Between RS-232, RS-422 and RS-485 (Video)

Differences RS-422 RS-485 Profibus

RS-232, RS-422, and RS-485 are pretty old serial communication interfaces, and I was not even born when RS-232 was specified in 1962, but there are still commonly used today in various applications such a points-of-sales,  multi-meters, industrial equipment like PLC or HMI, as well as medical devices. Maxim Integrated shared a video – embedded at the end of this article – on  social networks today explaining the fundamentals of serial transmitter devices and differences between RS-232, RS-422, RS-485, and Profibus. The video goes into more details with a glossary of terms, discussion of cable length and bitrate, hand-shaking, and auto-shutdown, but I’ll provide a quick summary below: RS-232 supports one transmitter and one receiver, and operate between -15 and +15V (with input tolerance of up to -/+ 25V). A logic zero is between +3 and +15V and a logic one between -15 and -3V on the receiver side RS-422 is an improved version of RS-232 with twisted pair cable and …

Support CNX Software – Donate via PayPal or become a Patron on Patreon

Texas Instruments Announces AMIC110 Sitara Industrial Communication Processor & Development Board

Texas Instruments Sitara AM335x SoCs integrate an ARM Cortex A8 processor @ up to 1GHz with a PRU-ICSS for industrial communication, but also include a display controller, an optional PowerVR GPU, and a rich-set of peripherals making it useful for a wide range of applications. The company has now launched AMIC110 Sitara processor with a Cortex A8 core @ 300 MHz, and a PRU-ICSS specifically designed for industrial Ethernet, and fieldbus communication. Texas Instruments AMIC110 Sitara processor key features and specifications: CPU – ARM Cortex-A8 processor @ up to 300 MHz with NEON, 32+32KB I/D cache, 256KB L2 cache, 176KB boot ROM, 64KB RAM External Memory Interfaces (EMIF) – mDDR(LPDDR), DDR2, DDR3, DDR3L Controller up to 1GB General-Purpose Memory Controller (GPMC) – 8-bit & 16-bit Asynchronous Memory Interface with up to Seven Chip Selects (NAND, NOR, Muxed-NOR, SRAM) 2x programmable Real-Time Unit Subsystem and Industrial Communication Subsystem (PRU-ICSS) supporting  EtherCAT, PROFIBUS, PROFINET, EtherNet/IP, and more (10 communication standards in total) …

Support CNX Software – Donate via PayPal or become a Patron on Patreon

Bosch Rexroth IndraControl XM22 PLC Runs Ubuntu Core IoT, Supports Industrial Apps

Canonical wants you to run Ubuntu apps (snaps) for everything and on all types of devices, not only on your computer or smartphone. For example, base station apps (4G LTE, Bluetooth, LoRa…) will soon be able to run on LimeSDR board, the company is pushing for branded app stores, like the one for Orange Pi Boards, and now they have introduced the concept of App Logic Controllers (ALC) which are PLC devices running apps, thus bringing the concept of apps to the industrial world. Bosch Rexroth demonstrated the solution at Embedded World 2017 on their IndraControl XM22 PLC running Ubuntu Core. Let’s have a look at the hardware first with IndraControl XM22 specifications: Processor – Intel Atom E620 one core / two threads processor @ 600 / 1300 MHz (3.3W TDP) Memory – 512 MB RAM Storage – likely some flash + SD card slot Networking Connectivity – Gigabit Ethernet (RJ45) port USB – 1x USB host port, 1x USB …

Support CNX Software – Donate via PayPal or become a Patron on Patreon

MYD-C437x-PRU Development Board Leverages TI Sitara AM437x Programmable Real-time Unit

MYIR Technologies launched MYC-C437x system-on-module based on TI Sitara AM437X processor, and the corresponding MYD-C437x development board at the end of 2015, but the latter did not make use of the processor’s PRU-ICSS (Programmable Real-Time Unit Subsystem and Industrial Communication SubSystem) block. The company has now released a new version of the baseboard called MYC-C437x-PRU which exposes I/Os pins to leverage the PRU-ICSS and enable implementation of protocols like EtherCAT and Profibus.MYD-C437x-PRU industrial development board specifications: System-on-Module – MYC-C437x module with SoC – Texas Instruments AM437x ARM Cortex A9 processor @ up to 1GHz with PowerVR  SGX530 GPU (AM4378/AM4379 only) System Memory – 256 or 512MB (default) DDR3 SDRAM Storage – 4GB eMMC Flash (reserved 256/512MB Nand Flash design), 16MB QSPI Flash (unpopulated by default), 32KB EEPROM Connectivity – Gigabit Ethernet PHY Storage – 1x micro SD slot Serial ports – 1x 3-wire RS232 debug serial port, 2x  5-wire RS232 serial port, 1x RS485 with isolation USB – 1x USB 2.0 …

Support CNX Software – Donate via PayPal or become a Patron on Patreon

FOSDEM 2017 Open Source Meeting Schedule

FOSDEM (Free and Open Source Software Developers’ European Meeting) is a 2-day free event for software developers to meet, share ideas and collaborate that happens on the first week-end of February, meaning it will take place on February 4 & 5, 2017 this year. FOSDEM 2017 will features 608 speakers, 653 events, and 54 tracks, with 6 main tracks namely: Architectures, Building, Cloud, Documentation, Miscellaneous, and Security & Encryption. I won’t be there, but it’s always interesting to look at the schedule, and I made my own virtual schedule focusing especially on talks from “Embedded, mobile and automotive” and “Internet of Things” devrooms. Saturday 4, 2017 11:00 – 11:25 – Does your coffee machine speaks Bocce; Teach your IoT thing to speak Modbus and it will not stop talking, by Yaacov Zamir There are many IoT dashboards out on the web, most will require network connection to a server far far away, and use non standard protocols. We will show …

Support CNX Software – Donate via PayPal or become a Patron on Patreon

Kunbus RevolutionPi RevPi Core Raspberry Pi based Industrial Computer Sells with Digital I/O Modules and Fieldbus Gateways

Kunbus, a German company specialized in industrial network solution, has decided to design an industrial system based on Raspberry Pi Computer module supporting variable power supply, a wide temperature range, DIN rail mounting, etc, as well as corresponding digital I/O modules and fieldbus gateways. RevolutionPI RevPi Core specifications: SoC – Broadcom BCM2835 ARM11 processor @ 700 MHz System Memory – 512 MB Storage – 4GB flash Video Output – Micro HDMI port Connectivity – 10/100M Ethernet port USB – 2x USB 2.0 host ports, 1x micro USB port Misc – RTC, 3x status LEDs (2 programmable) Power Supply – 10.7 V to 28.8 V; polarity protection; 4 kV / 8 kV ESD protection & EMI passed (according to EN61131-2 and IEC 61000-6-2), surge and burst tests passed Power Consumption – Max: 10 Watts including 2 x 450 mA USB load; typ.: 4 watts. Dimensions – 96 x 22.5 x 110.5 mm (Polycarbonate case) Housing type – DIN rail housing for …

Support CNX Software – Donate via PayPal or become a Patron on Patreon