TECHNICAL FEATURES AND REGULATIONS T Period of the built-in timer; the regulation is made by means of a screw driver on the front. The pulses repetition period (period between two pulses) must be shorter than T. The full scale value depends on the selected range. START Pins 4-8 contact N.O. which energizes the internal relay. VISUALIZATIONS ON GREEN LED : supply on A RED LED : it indicates the alarm condition (relay OFF) PROGRAMMING T12 is programmed using the DS1, the DS2 and the potentiometer T, on the front. - With the sliders 2 and 3 of the DS2, the type of sensor is chosen (See Tab. A). - The slider 1 of the DS2 is used to select if, at the start, the alarm will be instantaneous or delayed. - With the slider 4 of the DS2, the mode of operation is chosen: “N” - in the presence of pulses the internal relay is ON, when the pulses are missing the relay goes OFF. “S” - in the presence of pulses the internal relay is OFF, with pulses slowing-down, the relay goes ON. (Example: enable CRANKCASE opening). - With the DS1, sliders 1÷6, the range is chosen (See Tab. A). The range must be greater than pulses repetition time. If, for example, 0,5 sec. pulses repetition time is considered, the range of 1 sec. will be selected (the sliders 1 and 2 are activated simultaneously). If the slowing-down must be identified when T = 0,8 sec., T index must be positioned on the notch 8. With T index on the notch 10, the maximum slowingdown will be 1 second. If a maximum slowing-down of 5 sec. must be applied, the range 5 must be selected (the sliders 1 and 3 are activated and T index must be positioned on the notch 10). REMARK: for each range, the series of T goes from the notch 2 to the notch 10 (overlapping of the ranges). SIZE: 48x96x90 mm undecal male base. Accessories available on request: E 171 : hooks for flush mounting. E 172 : undecal female base for DIN. M 13A: plexiglas protection IP 54-tight closure (for flush mounting). E 346 : hold spring protecting from vibrations. Template:45x92 mm WORKING TEMPERATURE: 0÷70°C WEIGHT: kg 0,200 COLOUR: black

REMARK: It replaces LP 177 and LP 177S (changing the connections). FUNCTION The device controls the shaft revolution or the straight-line movement of a mechanical part, by means of the pulses received from a system: wheelsensor (fig.1) USE belt conveyors overhead conveyors elevator conveyors rotary or straight-line movement etc. enable crankcase opening

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