The Ross NK-D12/PN has a Phoenix connector on one end to connect to the NK-RP1/P or NK-RP1/PN, and a DB9 connector on the other to connect to a router or control device. You can connect up to four NK-D12/PN cables to the NK-RP1/P or NK-RP1/PN to provide redundant power to up to four Ross NK routers or devices.
The following routers use the DB9 connector for power:
All NK-164 routers
All NK-16 routers
All NK-32 routers
All NK-34 routers
NK-IPS Network Bridge
NK-VRC Virtual Routing Core
NK-3RD Third Party Interface
NK-JBX Geneos RCP Interface
RCP-NKM and RCP-NKQ Remote Control Panels