23All rights reserved ©N1 Critical Technologies, Inc.NE Series (20-30kVA)User Manual Chapter 3 InstallationStep 5 Connect the parallel communicating connector of each paralleled UPS by parallel cables(shielding communication wire), and fasten the corresponding parallel communicatingconnector by bolts.----EndThe lead of UPS 1’s and UPS 2’s output N, U, V, W are from the terminal bar of UPS, and shortcircuited on load or distribution cabinet of load. The connection of parallel system is as shown inFigure3-8.Figure3-8 The terminal wiring of NE Series (20-30kVA) UPS3.9 Connect Communication Wires3.9.1 RS232 CommunicationThe RS232/RS485 communication port is located in the rear of the device. It can realize the remotemonitoring for input voltage, frequency, output voltage, frequency, load, etc. of the UPS, and it alsocan achieve remote power on/ off operation.Definition for RS232 pins:DB9(RS232/485): 6P, RXD of UPS;DB9(RS232/485): 7P, GND;DB9(S232/485): 9P, TXD of UPS.
