Datek uses synchronous data transmission, which means that each bit of data is checked very carefully. Even the smallest deviation from the norm is detected, and then the entire data packet that has been received is rejected. Each system has a unique ID code. If the transmitter’s ID code does not match the receiver’s, radio communication will never be established.
Both the protocol and its checksum are digitally verified by dual processors using different software. This provides what is known as a redundancy check. If the processors interpret the protocol differently, they immediately shut down all outputs. Such safety features as digitally verified transmission and redundancy checking are just two of the innovations which Datek has pioneered in the area of radio remote control. Since its founding in 1979 Datek has focused on developing safe radio remote controls, something we still do and will continue to do.
The receiver’s frequency is adjusted to the required fre- quency band. For frequency shift transmitters, the receiver scans the frequency band until it finds the relevant trans- mitter with the correct ID code and protocol.
The receivers in this series can be provided with two-way communication. Feedback to the transmitter unit is ob- tained through semi-duplex, which means that only one frequency is utilised for both control signals to the receiver and feedback data. This is advantageous if availability of frequencies is limited, as you are only taking up one frequency instead of two.
The receiver cabinet is available in two different sizes, depending on the number of functions/relays required. Receivers with up to 23 relays come in a cabinet measuring 380 x 380 x 210 mm. Receivers with more than 23 relays come in a cabinet measuring 380 x 600 x 210 mm.
D2001 can control up to 20 digital functions. D2801 can control up to 28 digital functions.
D2801 Extended can control more than 28 digital functions by using two receiver logic boards in a master/slave configuration. This makes it possible to have 56 simultaneous digital outputs from the receiver.