Tecnologic TT73 FCR digital timer with potential-free inputs

The Ascon Tecnologic TT73 is a programmable microprocessor timer with one or two outputs. The device offers the ability to program up to 3 desired time values, 5 operating modes for OUT1 output, 4 operating modes for OUT2 output, 4 time ranges (from max. 9999 hrs. to min. 0.1 sec. ), 4 timing enabled function modes and 2 time counting modes (up and down).
The instrument includes an internal backup battery (9 V) that allows operation for up to 10 hours even in the event of a power failure.
The counting status is shown on the 4-digit display, while the status of the outputs is indicated by LED lights.
The instrument can have 2 outputs (relay or transistor to control solid state relay - SSR) and 2 digital inputs for start timing (CNT EN) and reset - reset (RES), which can be voltage free or voltage operated (with the same as the supply voltage).
Programming of the instrument is possible with the three front panel buttons , while timing can be done with the front U button or the digital inputs CNT EN and RES on the rear terminal block.

The operating modes of output 1 can be:

• delayed mode
• continuous mode
• asymmetric time oscillator start on
• asymmetric time oscillator start off
• single cycle asymmetric oscillator start off

The operating modes of output 2 can be:

• as output 1
• on during counting
• as output 1 with time t3 absolute
• as output 1 with time t3 relatively