Edwards 3-RS485B - Network Communication Card Class B over highly reliable central station receiver

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Edwards 3-RS485B - Network Communication Card Class B over highly reliable central station receiverThe 3 RS485B card provides a Class B (Style 4) or Class A (Style 7) circuit for network communications signals and a second Class B (Style 4) circuit for the digitized audio signals. Network messages received by the Network Communications card are re transmitted to the next network node. Re transmission maximizes the wire run lengths between nodes. With 64 nodes miles of network length is possible. Fail safe mechanisms built into the card direct