Run status or stroke counter, Tachometer input, 7 tachometer input – Pulsafeeder Pulsar DLCM User Manual
Page 23: 3 run status or stroke counter
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5.6.3 Run Status or Stroke Counter
The Status output can be configured through software to indicate that the pump motor is on or to
generate a pulse with every pump stroke (for use with an external stroke counter). The factory default
for this output is to indicate Pump Motor Status. The Stoke output is not in phase with the pump stroke
but has a 50% duty cycle (e.g., the output is ON for half of the stroke and OFF for the other half.).
An opto-coupler is used to achieve total isolation of this output. As such, the external control
equipment must generate the supply on the positive output and detect the return of that signal from the
DLCM. In a typical application, use 0.32mm
2
– 0.52mm
2
(22-20 AWG) wire to attach the terminal
labeled '5-STATUS(+)' – the collector terminal – to the external equipment's logic supply. Connect the
terminal labeled '6-STATUS(-)' – the emitter terminal – to the positive input of the equipment. The
negative input of the equipment should be connected to its isolated ground. A series resistance of 400
ohms is recommended – especially when sinking current (e.g., a photo-diode of an opto-isolator).
There is also an internal stroke counter that is re-settable. Refer to Section 7.2 - Menu –
Diagnostics – Diag. Menu 11/11.
5.7 Tachometer Input
The Tachometer Sensor is connected to the Tachometer Input. It senses motor rotation. This input allows
the DLCM to control motor speed.
Figure 7 – Tachometer Sensor Conduit Assembly