CONNECTIVITY MODULES
Microchip PL460 · G3-PLC CENELEC B · 80–305 VAC · Plug-in module
Communicate over existing power wiring — no new cabling, no RF spectrum, no interference. The same Host API works across all ARG comm modules: switch from Power Line to cellular or Wi-Fi with zero host firmware changes.
ARG CONNECTIVITY MODULES
The ARG G3-PLC Module is built around the Microchip PL460 OFDM modem, implementing the G3-PLC CENELEC B standard (95–125 kHz) for narrowband power line communications. It operates over 80–305 VAC lines, supports up to 255 nodes per mesh network with auto-commissioning and self-healing, and exposes the ARG Common Host API — the same UART binary interface used by every ARG comm module. Deployed in the DC3 edge gateway, PM3 and PM1 power analyzers, and the iAQ-Duct HVAC monitor.
CENELEC B — worldwide standard
Auto-mesh, auto-healing network
AC input, single & three phase
Private network encryption
THE ARG COMM PLATFORM
ARG products are designed around a common comm module footprint and a hardware-agnostic Host API. The same host firmware runs unchanged whether the module inside is cellular, Wi-Fi, Power Line, or Modbus. This means you can build one product and decide connectivity technology at production time — or even swap modules in the field.
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Samtec plug-in headers, common ARG module footprint. Every ARG comm module — cellular, Wi-Fi, Power Line, Modbus — fits the same pinout on the host PCB.
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A single UART binary protocol — PUBLISH, STATUS_GET, RECEIVED — works identically across all module types. The host sends a payload and receives data without knowing the underlying medium.
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Power Line where wiring exists. Cellular for remote field sites. Wi-Fi for campus deployments. Modbus for BMS integration. Select the module for each deployment — the product board never changes.
✈️
3.5MB NOR flash staging partition allows full over-the-air module firmware updates. The host streams the new image over UART; the modem validates, self-programs, and reboots autonomously.
CAPABILITIES
The Microchip PL460 implements the full G3-PLC CENELEC B stack — a proven standard used in smart metering and building automation worldwide. No RF permits, no spectrum congestion, no new wiring runs.
⚡
Microchip PL460 OFDM modem. G3-PLC standard in the CENELEC B band (95–125 kHz). Bi-directional data transfer between the power line and the host UART. Worldwide regulatory acceptance.
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Up to 255 nodes per network. Automatic network commissioning — nodes discover and join without manual configuration. Mesh auto-healing reroutes traffic around failed nodes automatically.
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Network PAN ID and private pre-shared key (PSK) prevent cross-network interference. Optional ECC 256-bit encryption for secure private network commissioning and end-to-end payload protection.
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Operates over 80–305 VAC, 50/60 Hz — single and three phase. The AC input is capacitively coupled with an isolation transformer; no active power is consumed on the AC rail.
SPECIFICATIONS
| Module Specifications | |
|---|---|
| PLC Chipset | Microchip PL460 OFDM Power Line Modem |
| PLC Standard | G3-PLC, CENELEC B band (95–125 kHz) |
| Modulation | OFDM (G3-PLC) |
| Data Rate | Up to 40 kbps (G3-PLC narrowband) |
| AC Input Voltage | 80 – 305 VAC, 50/60 Hz (single & three phase) |
| AC Coupling | Capacitive coupling + isolation transformer; zero active power on AC rail |
| Network Size | Up to 255 nodes per network |
| Network Topology | Auto-commissioning mesh with auto-healing |
| Security | Network PAN ID + private PSK; optional ECC 256-bit encryption |
| 12V Power Rail | 11.5 – 12.5 V, 70–150 mA (analog front end) |
| 3.3V Power Rail | 3.25 – 3.35 V, 56–65 mA (digital section) |
| Digital IO | 3.3V UART (TX, RX), active-low reset, 2× digital outputs |
| Connector | Samtec plug-in headers, 0.38mm board-mount pins |
| Storage Temperature | −40°C to +120°C |
| Operating Temperature | −40°C to +85°C |
| Host API Interface | |
|---|---|
| Protocol | ARG Binary Frame Protocol v0.1 |
| Physical | UART, 460,800 baud, 8N1, hardware flow control (RTS/CTS) |
| Signals | TX, RX, RTS, CTS, nRST, PWR_EN |
| Frame Format | SOF (0xAA) + VER + TYPE + LEN[2] + PAYLOAD[0–512] + CRC16-CCITT[2] |
| Max Frame | 519 bytes | Max payload: 512 bytes |
| CPU Burden | Zero — DMA + hardware flow control on both host and modem; CPU wakes only on complete frame |
| Compatibility | Protocol-identical across all ARG comm modules — cellular, Wi-Fi, G3-PLC, Modbus |
RESOURCES
FREQUENTLY ASKED
Straight answers to the questions we hear most about power line communication and the ARG G3-PLC module.
No. PLC keeps evolving — modern standards such as G3-PLC and IEEE 1901.2 bring improved modulation, stronger security, and hybrid (PLC + RF) networking. It's a core layer in next-generation smart grids and industrial IoT, and increasingly a data backbone: it collects reliable data from distributed devices that AI and analytics platforms use for predictive maintenance, grid optimization, and anomaly detection.
Power lines are noisy, but modern PLC is built for that environment. OFDM modulation, forward error correction (FEC), interleaving, and adaptive tone mapping keep communication robust even under severe noise.
No. PLC uses low-power, high-frequency signals superimposed on the line — negligible next to the power itself. They're designed to coexist with power delivery, are filtered and coupled to avoid affecting equipment, and comply with EMC standards. A properly designed PLC system doesn't affect power quality or supply stability.
PLC isn't inherently slow — it's tuned to the application. Narrowband PLC runs from kb/s to hundreds of kb/s, mid-band reaches Mb/s, and broadband up to roughly 1 Gb/s. Standards like G3-PLC and IEEE 1901.2 deliver hundreds of kb/s — plenty for advanced metering, firmware updates, and real-time grid control, where determinism matters more than peak throughput.
Not for systems already connected to power. Wireless wins on mobility, but PLC offers deterministic coverage — any device on the line can be reached — without coverage gaps, spectrum congestion, or dependence on external infrastructure. The two are complementary: the G3-PLC module pairs naturally with a cellular or Wi-Fi backhaul.
No. The power-line channel is fundamentally different from RF — periodic noise synced to the AC cycle, frequency-selective attenuation, impedance swings, and impulse noise from motors, relays, and switching. Reliable PLC needs a PHY layer purpose-built for that channel, not a wireless modem adapted to it.
Metering (AMI) is common, but PLC also serves street lighting, industrial automation, EV charging, transportation, and renewable energy. Modern narrowband PLC supports IPv6 (6LoWPAN), mesh routing, and strong security, making it a general-purpose technology for large-scale, mission-critical infrastructure.
Yes. Modern PLC standards include AES encryption (128/256-bit), authentication, secure key management, and controlled device provisioning. As a wired medium it also avoids over-the-air exposure, requires physical access to tap, and reduces the risk of jamming, spoofing, or RF-based attacks — a strong fit for critical infrastructure.
Usually the opposite. PLC reuses existing electrical wiring — no trenching, no new cable runs, no wireless site surveys or spectrum planning. With minimal added hardware, deployment is faster and total cost is lower.
Yes — up to millions of nodes across mesh and hierarchical topologies with utility-grade management. ARG's G3-PLC (ITU-T G.9903, CENELEC-B) supports 255 nodes per cluster with roughly 3-mile range over existing wiring, and clusters combine for wider coverage.
PLC is becoming core to long-term grid architecture. Modern standards (G3-PLC, IEEE 1901.2) are IPv6-based (6LoWPAN), built for interoperability and long lifecycles, and still evolving toward hybrid PLC+RF and higher performance. PLC networks already support DER integration, EV charging, and AI-driven grid analytics.
Adapted from “11 Myths About Power Line Communication (PLC)” by Zeev Collin, Semitech Semiconductor — Electronic Design, July 2026.
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