Automotive Solutions Home Solutions Metering Solutions Healthcare Solutions Standard Solutions Bluetooth base DECT base KNX base DFM 10N Radio Modem Accessories FM 433 Radio Modem		DFM 10N Radio Modem The DFM 10N radio modem is a small, handy transceiver for no chargeable radio data transmission. It has a combined transmitting and receiving unit and is optionally supplied with a ë/4 rod aerial or as a jack variant for the connection of a customer-owned ë/4 rod aerial and can be connected to a TTL level RS232 interface port. The modular character of this modem enables the user to integrate it with little expenditure into existing units or into equipment to be drafted. According to the ETS 300 220 European Permission Standard, the unit has been granted a general permit and requires no further permits for its use in Germany and in most of the European countries. Application Examples Due to the above features of this radio modem, applications on any areas of mobile data collection are possible: Logistics Acquisition of stock changes Stock taking Gastronomy Teleordering Confirmatory information Electronic Cash Radio transmission from cash terminals to the central computer Higher flexibility of cash terminals Mobile Measuring Technology No reading off on site, no manual entries Difficult-to-reach measuring points are accessible Safety Equipment Components of alarm systems Industrial Control Systems Substitution of cablings for plant control systems Plant state monitoring and many more. Technical Features This radio modem is suitable for transmitting and receiving of short data blocks. The length of one data block may be up to 64 bytes and should be terminated by ETX (03H, Ctrl C). An optional data block length of 256 bytes is possible. Then, automatic changing into the transmitting mode takes place, and the data block is transmitted. For data security, an SDLC protocol with automatic CRC check is used. The application of frequency synthesizer technology facilitates the operation frequency to be set between 433.25 MHz and 434.60 MHz over 28 channels within 50 kHz spacing. Functional Description The DFM 10 radio modem should be connected to a TTL level serial interface port and to the 5 V power supply. "Receiving" on channel 01 is the basic condition. After the "ETX" end-of-block code is recognized, the transmitting condition is established for the data transfer period. The output of data received can be enabled or discontinued through the RTS control line. The operating frequency is controlled through a given format which implements the tuning on one of the 28 different channels. This control sequence represents a complete data set is reserved for frequency changing. The data to be transferred should be entered as ASCII characters.		Downloads Datasheet (70 KB) Manual (385 KB)