Omron produce NX-series I/O System such as EtherNet/IP Unit, Communication Coupler, Digital Input/ Output Unit, Analog Input/Output Unit, Temperature Control Unit, Temperature Input Unit, Heater Burnout Detection Unit, Load Cell Input Unit, Position Interface Unit, IO-Link Master Unit, Communication Interface Units, RFID Units, System Unit, Safety CPU Unit, Safety I/O Unit and EtherCAT Salve Unit.
| Product name | Serial interface | External connection terminals | Number of serial ports | Communications protocol | Model | 
|---|---|---|---|---|---|
| Omron Communications Interface Unit | RS-232C | Screwless Clamping Terminal Block | 1 port | No-protocol Signal lines | NX-CIF101 | 
| RS-422A/485 | NX-CIF105 | ||||
| RS-232C | D-Sub connector | 2 ports | NX-CIF210 |