What is a Daisy-Chain, and how many devices (Intelligence Modules) can you connect? A daisy-chain is when devices are connected one after another on the same cable, like links in a chain. Power/communication flows: Supply → Device 1 → Device 2 → Device 3 → … This method is common in motor management systems with devices such as: · Siemens SIMOCODE pro · ABB UMC (Universal Motor Controller) How many devices can we actually connect in the ABB and Siemens? 🧐🧐 - Siemens SIMOCODE pro PROFIBUS → up to 125 nodes per segment (practically less due to cable length & performance). PROFINET → up to 256 devices per controller (depends on PLC & memory). - ABB UMC100.3 PROFIBUS → up to 125 devices per segment. Modbus RTU → up to 247 slaves per master (again, reduced in practice). In reality, integrators rarely push the limits. 😎 😎 Most OEMs (Original Equipment Manufacturers) recommend 30–40 controllers per bus segment to ensure speed, stability, and easier troubleshooting.
What is a Daisy-Chain and how many devices can you connect?
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Understanding Industrial Communication Cables In the world of industrial automation, reliable communication between devices is the backbone of efficiency and performance. Each cable plays a unique role in ensuring seamless connectivity across systems. Here’s a quick overview of some widely used industrial communication cables: Profibus – Trusted in Siemens systems for decentralized device connections. Ethernet – The backbone of modern automation (Profinet, Modbus TCP, OPC UA). MPI (Multi Point Interface) – Still used in Siemens S7-300/400 PLC legacy systems. RS-485 – The go-to for Modbus RTU, energy meters, and sensors. PPI (Point-to-Point Interface) – Designed for Siemens S7-200 and older machines. PC Adapters (USB to MPI/PPI/RS232) – Essential for programming legacy systems.
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Custom PLC panel. · 120V Supply Voltage · Siemens S7-1200 PLC with 7" Touchscreen o 14 Digital Inputs o 10 Digital Outputs o 8 Analog Inputs o 4 Analog Outputs · Additionally, the PLC is reading data from a remote Siemens RWF55.5 via Modbus RS-485. · The PLC will communicate with the customer’s building automation system via BACnet/IP
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MoistTech NIR sensors are factory-calibrated, maintenance-free, and connect directly to PLC or SCADA systems via RS‑232 or Ethernet. They’re non-destructive, non-contact, and insensitive to material variances, perfect for harsh environments and hands-off uptime! Discover the full list of sensor advantages here: http://bit.ly/4oUoydm #MoistTech #MaintenanceFree
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🎬 Now Live: MV820 Series AC Drive – Modbus RTU Communication Control Demo 🚀 We successfully demonstrated MV820 series AC Drive communicating with MC100 PLC via Modbus RTU. Key steps included wiring, parameter setting, and real-time monitoring through the MZ800 HMI. ✅ Quick wiring: RS485+/- connection (Pin1 & Pin3) ✅ Simple setup: V/F control, communication start/stop ✅ Real-time monitor: bus voltage, output current/voltage/frequency 🚀 This solution shows how Megmeet MV820 series AC Drive enables efficient and reliable motor control for industrial automation. #Megmeet #MV820 #VFD #ModbusRTU #IndustrialAutomation #ACDrives #PLC #HMI #RS485
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Acromag has added a new discrete AC input module, the Model NT2140, to their BusWorks® NT I/O family. A network interface supports PROFINET to communicate with programmable logic controllers. http://ow.ly/M6PE30sP2F4
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From wires and relays to advanced PLCs, our new Automation/Electrical/Inspection Unit Division has you covered. We handle everything, including flow meters, process controls, photo eyes, and limit switches. We upgrade your old relay panels to modern PLC systems, replacing outdated DeviceNet setups with fast, flexible Ethernet connections. No more device-dependent headaches, just smooth communication across your line. https://lnkd.in/gNfPuBBZ
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Why Industrial Switches Matter in Automation Industrial environments demand deterministic, real-time, and resilient communication. Industrial Ethernet protocols such as PROFINET, EtherNet/IP, and CC-Link IE TSN add the performance guarantees and interoperability needed for automation systems. Features like Media Redundancy Protocol (MRP) enable ultra-fast fault recovery in ring topologies—crucial for high-availability systems. Different industry brands are: 1.Siemens scalence 2. Moxa switch 3.C3 Automation 4.Phoenix Contact 5.Hirschmann (Belden) 6.Cisco Industrial Ethernet (IE) Series 7.Advantech 8. Stratix by Rockwell Automation Which one is industrial friendly and compactible with other PLC brands?
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I've been working on automation projects this year, and I’d like to share about PROFINET, Industrial Ethernet protocol I use to interconnect field devices. PROFINET is an Ethernet-based protocol designed to connect controllers, drives, sensors, and other field devices in automation systems. 🔗 A typical structure looks like this: ➡️ 🧠 PLC (controller) ➡️ 🔀 PROFINET Switch ➡️ 🧩 Remote I/O Modules ➡️ 🛠️ Field Devices ✨ Key advantages: 🔹 Vendor-independent → devices from different manufacturers work together 🔹 Automatic device detection 🔹 Built-in diagnostic tools 🔹 Error recovery capabilities 📏 Technical notes: Communication uses 2️ pairs of cables: • Pair 1️⃣ (Tx+/Tx–) → 📤 Transmit Data • Pair 2️⃣ (Rx+/Rx–) → 📥 Receive Data Maximum cable length between 2 components: 100 m (longer distances may cause signal loss). 💡 Tip: With fiber optics, you can reach up to 2 km
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