NX-I/O: Selection Guide Digital Click on the model name to learn more NX- OD6121-5 NX- OD6121-6 NX-OD6121 NX-OD6256 16 16 Output 16 Outputs 32 Outputs NPN PNP 24 VDC 12 to 24 VDC MIL MIL ScrewTB Screwless TB Screw TB Screwless TB NX-OD6256-5 Connector Connector NX- NX- NX- NX- NX-OD5121 NX-OD5256 OD5121-1 OD5121-5 OD5256-1 OD5256-5 MIL Fujitsu NPN PNP Connector Connector IL Fuj ector Conn itsu N ector PN PN PN P 32 Outputs NP N PN P Scre wTB M Conn IL ector Screw less TB Scre w TB M Conn IL ector Screw less TB M Conn IL ector Fuj Conn itsu ector N PN