DTD-16 Plus – DTMF Decoder with Relay Outputs and USB

The DTD-16 Plus is a full-featured DTMF tone/sequence decoder that is user programmable to decode single tones or sequences up to six tones in length and maybe assigned to any one of eight SPST normally open relays, eight open collectors and/or the USB serial port.

Categories: , SKU: be3159ad0456


The DTD’s relay and open collector outputs can be programmed to close for the duration of tone, pulse immediately after completion of detection, wait a programmed (up to 9.99 seconds) length of time after detection, or latch/unlatch. Programming is performed using a non-dedicated PC’s USB port equipped with a serial terminal program like HyperTerminal, Tera Term, or PuTTY.

Product Features

  • • Decodes all 16 DTMF tones or user-programmed tone sequences.
  • • 8 SPST really outputs and 8 open collector outputs.
  • • Adjustable tone detection time.
  • • Front panel relay status, power, tone activity, program mode, and activity LEDs.
  • • Programmed via USB serial connection.
  • • All connections except for the USB type B connector and a coaxial DC jack are on removable euro-block screw terminal connectors to simplify wiring and service, mating plugs are supplied.
  • • Fully RFI proofed.
  • • Surge protected power supply. Domestic power supply included.
  • • Up to four units may be mounted on the optional RA-1 rack shelf, using four supplied Velcro feet. Desk top and wall mounting is also possible.