Ready to put up lights but have one question!

Looked around and found one source that said the far end should be terminated with a 120 ohm resistor. It also said the total daisy chain could be 1.2kilometers long.

I'll ignore both items. 

The delay on the scale of our displays can be measured in nanoseconds (that's 0.000000001 seconds).  The COM port speed introduces more delay than the wire ever will, and for most applications even that isn't noticable. 

I had runs of 100ft last year and had no issues....

You have nothing to worry about. There is *NO* delay. The data on the CAT5 cables is moving at a rate of 200,000 km/sec. So even if you could have a delay, your cable would have to be 125,000 miles long (about 5 times around the equator) for 1 second of delay! Btw, the RS485 standard limits your cables to 4,000 feet ;) (I don't remember what the d-light/lor RS485 adaptor limitations are.) If you want to get real technical about it, worst case cenario, if you use a 4000 foot CAT5 cable, your delay would be .000006 seconds (or 6us)!

Edited by Comporder1 - 12 Nov 2008 at 10:09pm

I'm using an FM transmitter also but all I have done so far is listen to the sequences without the lights going. I meant a delay from the sequence itself to the lights, I had heard that depending on the length of cords and cables you might experience delays.