Firmware version 230 added HDCP abilities to the following units:

C2-2200A
C2-2205A
C2-2250A
C2-2255A
C2-2350A
C2-2355A

(Only units with DVI input and output can support HDCP.)

These changes are covered in manual version 2.4, and also in this addendum sheet:
Addendum-C2-2000A-HDCP.pdf

See C2-2000 / C2-2000A Series firmware updates