NCM Backplane and Power Connections

The NCM occupies a single slot in the multiplexer chassis and conforms to the RFL IMUX 2000 back plane signal format. All T1 and E1 signals, and control signals passing through the back plane, interface with the cross point Lattice device (U6). All inputs and outputs of the Lattice Device are pulled up to 3.3V through approximately 50K Ohms.

The NCM requires digital +5Vdc and digital ground connections to the back plane. TP2 and TP12 are the ground test points. The digital +5V from the back plane is routed to the Hot Swap Controller (U1, which controls the ramp of the power to all of the ICs. The ramped digital +5V supply is only directly used to provide power to the LEDs, DS1 through DS13, and can be monitored at TP1.

Linear voltage regulators U3 and U4 step-down the +5V digital supply to produce +2.5V and +3.3V supplies respectively. The +2.5V is used exclusively to power the Actel FPGA (U2). The 3.3V is used to power the Lattice device (U6), the I/O of the Actel (U2), the 49.152mHz oscillator (U11), and the pull-up resistors on the module. The +2.5V and 3.3V supplies can be monitored at TP3 and TP4 respectively. All pins which connect to the back plane, except for voltages and grounds, are cut back to prevent components from being driven before the module is fully powered.

TX INPUT PORTS

The NCM module supports one or two TX input ports depending on the interface adapter installed (i.e. MA-402I, MA-485, or MA-490). An asynchronous data signal is applied to a TX input of the appropriate interface adapter. The data signal is converted from RS-232, MA-485, or Ethernet to a logic signal on the interface adapter before being fed through the back plane to the NCM module. These logic signals pass through the Lattice device (U6), and are applied to the Actel’s (U2) UART receive section. Indication of TX input activity can be observed at the IN1 and IN2 LEDs, and via the NMS software.

RX OUTPUT PORTS

The asynchronous logic data signal is transmitted by the UART Transmit section of the Actel (U2), and passes through the Lattice device and back plane to the interface adapter. The interface adapter converts the logic signal to the appropriate interface format (i.e. RS-232, RS-485, or Ethernet), depending on the interface adapter installed. The CTS and RLSD are always active for RS-232 applications (MA-402I) that require these to be active. Indication of RX output activity can be observed at OUT1 and OUT2, and via the NMS software.

LOGIC ARRAY (ACTEL DESIGN)

The Actel FPGA controls, processes, and coordinates all functions of the NCM. It interfaces switches, LEDs, SCB bus signals, T1/E1 bus signals, and I/O control lines. The Actel design can be broken down into the following nine functions: SCB, Application Modes and Interfaces, UART Receive, UART Transmit, T1 Transmit, T1 Receive, Rogue Control, Loop-backs, and Baud and Clock Generator.

RFL NCM		RFL Electronics Inc.
November 6, 2007	22	(973) 334-3100

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.

RF-Link Technology RFL NCM NCM Backplane and Power Connections, TX Input Ports, RX Output Ports

Models: Network Communications Module RFL NCM