STI-73
STI-73 ratemeters are the board-type ratemeters designed to control rotational speed. Available parameters of divider and multiplier enable flexible scaling of rotational speed and also transformation into material linear speed. They also enable operation in the frequency meter mode. The ratemeters have optionally 1 relay or OC output, programmable depending on the instantaneous rotational speed.
Parameters
| Power supply | 19V ÷ 50V DC; 16V ÷ 35V AC or 85 ÷ 260V AC/DC |
|---|---|
| Measurement range | 0 ÷ 999999 + decimal point |
| Power consumption | for 85 ÷ 260V AC/DC and 16V ÷ 35V AC power supply: max. 4,5 VA; 19V ÷ 50V DC power supply: max. 4,5 W |
| Input | pulse, fully isolated, with debouncing filter and pulse width control, max. input frequency 50.0 kHz |
| Data memory | non-volatile memory, EEPROM type |
| Communication interface | RS-485 / Modbus RTU (not galvanically isolated) |
| Output | 1 relay (option) 1A/250V AC (cos fi=1) or OC 30mA/30VDC/100mW; power supply output: 24V DC + 5% -10% / max 100 mA |
| Transmission parameters | 1200 ÷ 115200 bit/s, 8N1 and 8N2 |
| Storage temperature | -10°C ÷ +70°C or -20°C ÷ +70°C (with option 08) |
| Operating temperature | 0°C ÷ +50°C (standard), -20°C ÷ +50°C (option) |
| Accuracy | frequency measurement: ± 0.02% (full temperature range) |
| Case | panel mounting |
| Case dimensions | 72 x 36 x 97 mm |
| Protection class | IP 65 (front), available additional frame IP 65 for panel cut-out sealing; IP 20 (case and connection clips) |
| Panel cut-out dimensions | 66,5 x 32,5 mm |
| Display | LED, red, 6 x 9 mm high |
| Rotational speed unit | revolutions per second (rps), per minute (rpm), per hour (rph) |
| Pulse waiting time | settable from 0,1 to 39,9 seconds |
| Rotational speed accuracy | selected in the range 0 ÷ 0,00000 |
| Installation depth | min 102 mm |
