Using 1 Proximity Sensor to Supply 2 Loads

I currently have a piece of equipment that uses 2 NPN proximity sensors. Both sensors monitor the same toothed pulley on a machine are used as
inputs to independant counting circuits.
I would like to modify the set up, so that only 1 sensor is used. The resulting system will look something like the diagram below. Is there anything commercially available (perhaps from RS Components) that I can use to provide the 2 isolated outputs for loads A & B, from a single input fom an NPN sensor ?
TIA, woodglass
_____________ _________ _________ ! NPN ! ! Signal ! ! ! ! Sensor !--------! Isolator !--------! Load A ! !____________! !__________! !_________ ! ! ! ! ! _________ ! ____________! ! ! Load B ! ! _________!
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woodglass wrote:

One technique is to daisy-chain the inputs of two opto-isolators.
It does create the risk of a single point of failure - possibly not too great a problem if the loads are only counters (and it isn't counting money ;) )
--
Sue



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What about a pair of isolation diodes from the counter inputs to the collector of the one NPN sensor? This assumes that each counter has its own internal pull up resistor. And as another poster questioned, perhaps the redundant sensors are purposeful for data integrity. In other words if a sensor fails, how do you determine if the process was correct?
woodglass wrote:

--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"
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