In the Broadcast Mode of operation, all nodes receive the same data regardless of who is transmitting. The broadcasting applies to both ports of a two-port I/O.

The Master Mode of operation designates a particular NCM at a node, as the master. If the NCM is set up for TERM/DI-A or DI-B operation, and the I/O has only one port, the actual functionality is the same as the broadcast mode. If the NCM is set up for both DI-A and DI-B operation, the data received from either bus is terminated and is not passed back onto the bus. If the I/O has two ports, Port 2 is always the slave to the Port 1 master, and cannot transmit onto or receive from the T1 bus. Typically, the master transmits to and receives from all of the slave locations. Only one slave can transmit onto the T1 bus any time, otherwise the data received by the master will be corrupted.

The D&I Slave Mode of operation designates an NCM at a D&I node as slave that must pass data thru but only transmits to and receives from the master. Set for TERM/DI-A or DI-B operation towards the master location. Only one slave can transmit onto the T1 bus any time, otherwise the data received will be corrupted.

The End Slave Mode of operation designates the particular NCM at a node as the terminating point of a network that is not the master. The NCM is setup for TERM/DI-A or DI-B operation depending on the direction to be terminated. If the I/O has only one port, the actual functionality is the same as the broadcast mode. If the I/O has two ports, both ports are slaves that transmit to and receive from the master, but not with one another.

The NMS uses the following I/O Interface types:

I/O Types/Module Adapter

RS-232 (or none)/ MA-402I

Ethernet/ MA-490

RS-485 4W/ MA-485

RS-485 2W/ MA-485

The MA-485 I/O is used for both 2W and 4W RS-485 applications, and will support all of the NCM Application Modes except NMS mode. The jumper position on the I/O is set to either “2W” or “4W”, and sets the Type ID accordingly. The input and output serial data is routed as required for the selected RS-485 type. In “4W” mode, a jumper on the I/O will force the driver to always be enabled so that an idle condition produces a MARK output. The “2W” mode only supports half-duplex operation, while the “4W” mode supports both half and full duplex operation.

3. UART RECEIVE SECTION

The UART receivers are programmed for the appropriate baud, number of data bits, and parity for the input data expected to be received. The input data, including start, stop, and parity, is sampled by a 64X nominal baud internal clock. The received parity bit is compared to the parity calculated by the UART> Once the data is recognized as valid, the data is latched and is ready for transmission. The UART receiver is reset if a framing error, parity error, or break indication is detected.

RFL NCM

 

RFL Electronics Inc.

November 6, 2007

24

(973) 334-3100

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RF-Link Technology RFL NCM, Network Communications Module manual Uart Receive Section
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Network Communications Module, RFL NCM specifications

RF-Link Technology has emerged as a significant player in the realm of wireless communication, and one of its standout offerings is the RFL NCM (Network Communications Module). This module is designed to facilitate efficient and reliable data transmission in a variety of applications, making it a versatile solution for both industrial and commercial needs.

The RFL NCM is built on advanced RF technologies that support multiple communication protocols, ensuring compatibility with different systems and devices. One of its main features is its exceptional range. The module is capable of transmitting data over long distances, making it ideal for applications where devices are spread out. This long-range capability is essential for remote monitoring and control tasks, such as in smart agriculture, environmental monitoring, and industrial automation.

Another defining characteristic of the RFL NCM is its low power consumption. The module employs energy-efficient communication methods, enabling devices to operate for extended periods without frequent battery replacements. This makes it particularly useful in applications where power availability is limited or where continuous operation is required without maintenance interruptions.

The RFL NCM supports a variety of communication protocols, including LoRa, Zigbee, and MQTT, providing flexibility for developers and integrators to choose the most suitable technology for their specific applications. Its robust design ensures resilience in various operating conditions, including extreme temperatures and potential environmental hazards like moisture and dust.

Ease of integration is another strong point of the RFL NCM. With extensive documentation and support, developers can quickly incorporate the module into their existing systems. It also features built-in security protocols to safeguard data during transmission, which is particularly important in today’s increasingly connected world where data breaches are a growing concern.

The RFL NCM is not just about performance; it inherently supports scalability, allowing users to expand their network as their needs grow, whether that's adding more sensors to a monitoring system or integrating additional devices in a smart home. This commitment to both performance and adaptability makes the RFL NCM an attractive option for developers looking to harness the power of RF communications.

In summary, the RF-Link Technology RFL NCM stands out due to its long-range capabilities, low power consumption, support for multiple communication protocols, and robust integration features. With applications across various sectors, including industrial, commercial, and residential, this module promises to enhance connectivity and streamline operations in an increasingly wireless world.
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