Series Resistor Sizing for 6 Parallel Reed Switch Meters on 24V—How to Calculate?

i have a 2 conductor reed switch device (meter) that suggests adding a series resistor after Vcc to increase the life of the sensor. I hadn't done that before, and now I am wondering if the device not ticking is because i fried the magnetic pickup  

Anyhow, I want to put a 10k in series with Vcc but in the production model of this test there will be 6 of these meters running via the same 24v source. It seems counter intuitive that the resistors are in parallel when looking at the electrical enclosure and envisioning them separately, but in reality, they share the same ground and source, so will I need to find resistors that equate to 10k net resistance after the parallel calculation? Thanks 

Hi,

Does it state that the series resistance should be 10KΩ? I didn't get the part where you said in the production model there will be 6 meters running via the same 24 volt source. Can you restate your conditions here? Are you asking if you need to connect series resistance despite the parallel resistance seen at the enclosure? Can you show us the circuit diagram? My thoughts are if the device needs additional series resistance to last longer, it can be connected anywhere before the meter..

Kevin, I am traveling a bit at the moment, so I will try and draw something up as soon as possible. But I quite literally mean this: picture a 24v Vcc, then a resistor, then a switch (the pulser) and it goes into a current sinking discrete input module on a PLC. Now imagine that module filled up with 5 more of these circuits. They all share the same Vcc and Com, so I'm just wondering if the resistor I choose in these individual circuits is going to be drastically reduced via parallel resistance.
M