Pulse Output
Reed/Hall Effect Sensor Pulse Output (..H0)
The Hall Effect sensor is a high resolution solid state 3wire device providing an unsourced, open collector, NPN transistor output. The term “un-sourced” means that no voltage is applied to the output from within the fl owmeter, it must be pulled to a “high” or “on” state by between 5 - 24 VDC supplied from an external source, typically the receiving instrument. The pulse output between signal and -0 V is a voltage square wave with the high level being the DC voltage available at the open collector and the low level being -0 V.The receiving instrument must incorporate a pull up resistor (typically greater than 10 kΩ in most instruments) which ties the open collector to the available DC voltage level when the Hall sensor is not energized. When energized the open collector output is pulled to ground through the emitter (-0 V).For the Reed Switch technical description, see the R0 details below.Hall Effect Power Supply: max. 5-24 VDC, max. 20 mA