3 Installation and Wiring Connecting NB Unit and CP1E Execute One-to-one connection between the Host (PLC) and the NB Unit. Connect CP1E and NB7W with a PT-PLC connecting cable (XW2Z-200T). NB CP1E RS-232C(15m max) Note Please use OMRON PT-PLC connecting cable. Using other cables may result in failure. Precautions for Safe Use • Always keep the connector screws firmly tightened after the communication cable is connected. • The maximum tensile load for cables is 30 N. Do not apply loads greater than this. • Always turn OFF the power supply before connecting or disconnecting cables. 3-8 NB-series Programmable Terminals Startup Guide Manual(V109)