The 1784-PCC1 is specifically a PC Card (PCMCIA) type communication card and is part of the Allen-Bradley Data Highway Plus (DH+) communication platform. DH+ is a legacy network used for communication between Allen-Bradley PLCs, I/O modules, and other devices.

The 1784-PCC1 card allows a computer to interface with DH+ networks using a PC Card slot, commonly found on older laptops and some industrial computers. The card typically comes with software drivers that enable communication with Allen-Bradley devices using DH+ protocols.