The Weidmüller Wireless Sensor Acutuator Interface (SAI) modules form a wireless I/O communication network and thereby fully replace bus cables in drag chains or fault-susceptible slipring assemblies in a wear-free manner. This increases machine availability and reduces maintenance costs, e.g. for replacing defective drag chains or worn slipring assemblies.
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Through the use of interference-proof and fast Bluetooth communication between the gateway and slave modules, they achieve a cycle time of up to 10 ms. The connection between the wireless modules is established automatically and is not visible to other Bluetooth devices and, as a result, is not susceptible to interference. The output power and, thus, the range, can be set individually on the module.
The gateway module can be directly integrated in the bus network without a bus coupler and is directly addressed via the respective configuration interface (e.g. Simatic Manager or RS-Networks). Various slave modules with digital and analogue inputs and outputs are available and enable exact adjustment to the requirements of a given application. A total of six slave modules can be operated on a gateway. Thus, up to 96 wireless I/Os are available. Each I/O channel can be directly and separately monitored via the bus system.
