Dawn CONTROL-1500A Manual page 72

CONTROL-1500A Single Axis Antenna Controller Appendix D The RCI RS422 Interface Spec 65
RS-422 Protocol
The interface is a multi-drop, balanced line, asynchronous, full-duplex communications link
designed to interconnect equipment for remote control and switching applications. Products
that are compatible can be linked together over a parallel-connected 4-wire circuit without
regard to their particular function.
Each network configuration can have one master and up to 32 slave devices. Each controller
is internally configured to respond to a unique address. A master could be a protection switch,
earth station controller, or any micro- or mini-computer that is electrically and operationally
compatible with RS-422. Since the electrical specifications are very similar to EIA standards
RS-422 and RS-449, virtually any computer that meets these standards is capable of
controlling remote devices.
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