AMI RF Mesh Communication Module For Single Phase Meter DC2-RSF1

Company Profile

Willfar Information Technology Co., Ltd.

- Established in 2004;
- Listed on the STAR Market of the Shanghai Stock Exchange in December 2019;
- Leading supplier of meter reading (AMI) equipment and operation service;
- The first company to develop "One DCU Reading Multi-meter" solution in China;
- The first company to have large-scale application of technologies and systems like "CPU smart-card Charge and Control", "One DCU Reading Multi-meter", LoRa-based RF Communication and "District Metering Area (DMA)”

Introduction

- The DC2-RSF1 RF Mesh Communication Module is based on SoC (System on Chip) platform as configured for energy meters and other devices to be used in Willfar AMI Solution.

A basic block diagram of the module is shown in Figure as below:

- Willfar DC2-RSF1 conforms to Wi-SUN FAN Specification, which is open-standards based secured, interoperable communications for large scale IoT for Smart Utility and Smart City networks.

- DC2-RSF1 integrates SWMW920S Radio Module produced by Zhuhai Zhonghui Microelectronics Co., Ltd (a sub company of Willfar), whose certification identifier in Wi-SUN Alliance is WSA 0215.

- In a typical application, the module will be installed in electricity metering applications.

- The module will communicate with other network devices. This can include other meters, relays, access points, Distribution Automation devices and other host devices.

- DC2-RSF1 could be adopted to Single Phase Electric Meter

Technical Parameter

Certificate

Wi-SUN/IEEE802.15.4g/6LowPAN

Features

1. Conforms to Wi-SUN FAN specification

• Feature complete specification is approved
• Supports IEEE802.15.4g/4e PHY/MAC, 6LowPAN, and IPv6
• Supports multi-hopping operation and frequency hopping
• Supports encryption (AES) and authentication (802.1x)

2. Programmable frequency band: 902~928MHz US/BZ and PHY operational mode.

3. Highly Secured: certificate based authentication

4. Easy to install and maintain: self-forming/healing mesh network, upgradeable

5. Longevity: open standards, upgradeable

6. Ability to scale easily to thousands of nodes: optimal use of frequency band

7. Reliable and resilient: mesh, multiple channels, demonstrated interference tolerance

8. Long range: sub GHz, mesh

9. Low latency: high data rates, low channel utilization

10. Energy Efficient: short transmission time, long battery life leaf nodes

11. Low Cost: open standards, multiple silicon vendors

12. Multi-vendor Interoperability: certification program for complete communications protocol stack

Functions

Host Interface

Antenna

The NIC can support several different types of antenna:

Onboard/internal:

The onboard antenna is soldered to the NIC PCB. It is a stamped metal antenna supporting 900MHz

Off-board:

The off-board antennas connect to the NIC via an MMCX RF connector. The off-board antenna is located inside the host enclosure. The host enclosure provides a safety barrier, which means that the NIC power supply will generally not need to be isolated from the mains voltage. The off-board antenna is typically a flexible dipole antenna.

External:

External antennas connect to the NIC via the same RF connectors as the off-board antenna.

Typically, the external antenna cables are routed to a bulkhead SMA connector on the outside of the host enclosure. An external antenna solution will require safety isolation from the AC mains voltage.

Situation

For Single Phase Electric Meter, or data concentrator or other instruments required communication module.

Dimension

Introduction

As the first company in Hunan Province to be listed on SSE STAR Market, Willfar is the pioneer manufacturer in China that can simultaneously provide related industries with all kinds of advanced electricity, water, gas and heat metering products and meters for power distribution, power quality monitoring equipment, a full range of energy data concentrators, relay protection equipment, switchgear products and equipment related to metering automation system and all kinds of application systems as well as services which cover the demand of the whole process of energy production, distribution, transmission and consumption.

Willfar Information Technology Co., Ltd always focuses on customers and takes full control of products’ delivery and deployment, including the process of designing, testing and experimenting as well as the manufacturing process of raw material. We attach great importance to production control plan, potential failure mode and product reliability design which require us to implement the production approval procedure and control the production process strictly so as to ensure the products’ quality.

On November 4, 2013, President Xi Jinping, also general secretary of the Communist Party of China (CPC) Central Committee, visited Wasion in Changsha. He visited the product showroom and production workshops, where he talked with workers and labor models. Xi spoke highly of Wasion's achievements in product development and market expansion and encouraged the company to step up innovation in technology, management, product, marketing and branding.

So far, Willfar has 396 valid patents, of which 26 are invention patents, 240 pieces for utility model, 130 pieces for design and 442 software copyrights; it has also received 10 technical awards of provincial or ministerial level or above. Willfar has participated in the setting of 15 national industry standards, 10 of which have been published.

Willfar Information Technology Co., Ltd takes "smart manufacturing capability" as one of its core competing powers by realizing the whole process data tracing and full-lifecycle management of product design, processing, procurement, production, logistics and service via SCM, CRM and APS on the basis of ERP, PDM, PLM and MES.

So far, Willfar has 396 valid patents, of which 26 are invention patents, 240 pieces for utility model, 130 pieces for design and 442 software copyrights; it has also received 10 technical awards of provincial or ministerial level or above. Willfar has participated in the setting of 15 national industry standards, 10 of which have been published.

The smart manufacturing technology research project of Willfar is the upgrading and reconstruction of the production facility which is about 100,000 square meters. It will become a leading digital factory with full coverage of information system, high level of production technology and automation.