1. An industrial control system communications adapter, comprising: a first connection operatively coupleable to a first open architecture network; a second connection operatively coupleable to a proprietary protocol network for communicating with at least one device on the proprietary protocol network; a third connection operatively coupleable to a second open architecture network for communicating with at least one device on the second open architecture network; and a bridging system operatively coupled with the first, second, and third connections and operative to receive incoming packets from the open architecture and proprietary networks, to construct outgoing packets based at least in part on received incoming packets, and to send constructed outgoing packets to the open architecture and device networks.