IVB\’s Home Theater and Home Automation

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Terminals? Resistors? RS-485? Is this english?

Posted by IVB on May 12, 2006

Please allow me to tell you how hard it is to get up to speed on the whole resistor/termination thing is for security systems. To be safest, you need to specify "end of line" for a circuit by attaching a resistor. But, you can't attach too many or too few. I can't currently get any of my integrated smoke detectors to work when they're in my 2ndary cabinet. People are really trying to be helpful, but they're using words like termination, RS-485 bus, 2.2K resistors, and terminals. This is even worse than trying to properly calculate Ohms on speaker circuits.

I'm hoping that my track record holds, and the act of making a post declaring that I'm confused will result in me immediately realizing what the problem is, hence making this post invalid.

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