Low power consumption and battery operation give the STD-502-R the performance demanded for applications where long range and reliability are required. The transceiver uses a transparent data interface to enable users to communicate using their own protocols with 77 available channels at a line-of-site range of up to 300m. Designed to be embedded in equipment, the STD-502-R was developed as a radio module for industrial applications that require reliable operation. Besides using highly noise-resistant direct-sequence spread spectrum (DSSS) modulation, the module has a true diversity receiver function for preventing signal dropout due to multi-path fading.
The modules can be set easily via the RS-232 UART interface using dedicated commands. Spread-spectrum correlation (a key part of spread spectrum communications) is done in a custom onboard ASIC instead of relying upon conventional RFICs, which guarantees the long-term supply of key radio components required in industrial devices.
The STD-502-R module itself has no built-in communication protocol. Instead, it has a transparent RS-232 data input/output interface, enabling users to employ their own protocols without modification. In addition, it can continuously transmit a LOW or HIGH signal without restriction, which was not possible with earlier models.
An evaluation board – the TB-STD502 – allows evaluation of the STD-502-R module, to perform range, data packet, and switching signal transmission tests. Onboard LEDs, CH switch, ID switch and push buttons can exercise switching signal tests and packet tests with packet error indication.
The STD-502-R is designed for an operating temperature range of -20 to +65 °C with an RF power of 10mW (3.3 V 65 mA) and intended for the remote control of industrial equipment or for industrial measurement systems. The STD-502-R is made by Circuit Design – a leading Japanese low power radio product design and manufacturing company. For detailed specifications, free technical assistance, or additional information, please contact Saelig 1-888-7SAELIG, via email:info@saelig.com, or by visiting www.saelig.com.
About Saelig Company Inc.
Founded in 1988 in Rochester, New York, Saelig is a North American distributor with a growing reputation for finding and sourcing remarkable, unique test and measurement and control products and components for use in a wide variety of industries. Products lines are continuously added from sources across the globe, and are offered at competitive prices, accompanied by full in-house technical support, exceptional customer service, and fast delivery. For full details of available product lines, please visit www.saelig.com.
