CPC and DB9, DB25 Connector Pin-outs

DB9 and DB25 connectors are used for RS232 communication. Scroll down for the pinout illustrations. Also included are the RS232 cables for connecting legacy CNC controls to computers for file transsfer.

Two varieties of the Amp Circular Polarized Connectors (CPC) are used on the OmniTurn CNC and electronics cabinets. The pin numbers for these connectors are shown in the pictures right below.

The 14-pin female bulkhead connector is used on all OmniTurn CNCs, for axis motors, spindle encoder and Misc cable. G4 CNC’s also use the 14-pin female connector for Operator’s Station and (optional) C-pulse cable. Legacy OmniTurns use the 14-pin female bulkhead connector for Operator’s Station connection to the spindle electronics cabinet.

The 16-pin female bulkhead connector is only used for the optional OmniTurn ZipLoader spindle cable, and for the optional Additional I/O Interface. When either of these options is installed, the male bulkhead connector is mounted on the spindle cabinet door

The DB9 and DB25 connectors are primarily used for RS232 connetions. On the almost all motherboards, the DB9(M) is designated COM1. On the legacy motherboards, the DB25(M) is designated COM2. COM1 is used for serial communication with a computer, but the wireless Network Interface is much better for that. COM2 is used for PLC Expanded I/O and for communicating with the Zip Loader automatic bar loader.