How to Integrate Wireless-Based Remote Components into your Network

Related Vendors

TURCK GmbH

EagleBurgmann Germany GmbH & Co. KG

Angst+Pfister AG

Phoenix Contact Electronics GmbH

Better Penetration of Obstacles

The new Radioline module operating in the 868 MHz frequency band represents an optimal solution for distant remote stations. For the wireless component stands out for its high degree of robustness and reliability. In addition, it works well in bridging great distances, as well as penetrating obstacles better, such as trees. The module operates in the sub-band of the frequency range from 869.4 MHz to 869.65 MHz, with an adjustable maximum transmission power of 500 mW. Especially where remote stations of water-management companies are concerned, effective penetration constitutes an essential factor, because the structures are often located in inaccessible forest sections or isolated residential areas.

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A special feature of the wireless module that can be used in Europe stems from the adjustable data rate of the wireless interface in the range from 1.2 kbps to 120 kbps, which increases its reception sensitivity. A low data rate can span a significantly longer distance than high data rates. As a result of the individual adaptation, users can therefore make the optimum settings for their particular application and the required range. However, a reduction in the data rate will necessitate an increase in the latency time of the signal transmission in the range of seconds. Since communication with elevated water tanks, for example, is not a time-sensitive application, the Radioline module is ideal for such applications.

Implementation of Any Network Structures

Each wireless component functions either as a master, repeater, or slave. The master initiates network setup, repeaters transfer the data, and slaves form the end points in the network. The modules are configured in the factory, and can be commissioned without software by simply making the appropriate setting with the yellow thumbwheel. Users define the radio-ID (RAD-ID) using this thumbwheel. In a network every wireless component must have a different setting. The master is defined using the radio-ID ‘01.’ The IDs ‘02’ to ‘99’ configure the module automatically either as a repeater or slave. Thus, a wireless network can consist of up to 99 stations, and any structures can be realized — from simple point-to-point connections to self-healing mesh networks.

The module has one RS232 and one RS485 interface in the two-wire design. This way, for example, serial data packets can be transmitted between Modbus controllers, or I/O signals of the wireless-slave stations can be sent on directly to a Modbus-RTU controller. As a result, the system is highly versatile — for simple I/O-to-I/O communications and as a substitute for serial cables, or for the direct, wireless integration of I/O signals into the Modbus protocol.

The wireless system also sets itself apart as I/O signals can be distributed easily in the wireless network. Learn more on the next page ...

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