Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Resistors used with buderus EM10

Ray Landry_2
Ray Landry_2 Member Posts: 114
in THE MAIN WALL
Hello all, I've got a job where I need 500 ohm resistors to enable communication between a tekmar 265 control and a buderus EM 10 interface. Due to the fact that NOWHERE I go has 500 ohm resistors, can I safley assume I can use 5 100 ohm resistors in series to have the same effect?

<A HREF="http://www.heatinghelp.com/getListed.cfm?id=463&Step=30">To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"</A>

Comments

  • jp_2
    jp_2 Member Posts: 1,935
    pull down resistor?

    a 470 ohm might be close enough, better than five 100's, i would use two 1,000 ohm in parallel.
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928


    You got that right jp!

    Standard tolerance for resistors is plus-minus 10% and such is good enough for most applications.

    Two 1,000 ohm in parallel would have a better chance of "close to" 500 ohm than 5 x 100 ohm in series.

    I would though try the standard 470 ohm.

    jp: Do you know why 470 and 4,700 are such common values for resistors?
This discussion has been closed.

Categories