In order to wire our Eclipse series readers for data communication you must run the wiring in parallel.You run your wire from either the ACC-1000 or your CN-550 (RS485 to RS232 Converter) to your first reader then you run in parrallel from your first reader to your next reader and so on. Do not home run the readers. Please see diagram below. You would wire it the same way if you were going to the ACC-1000.