ABB REO 517 Applications Manual page 15

Multi-function terminals for railway application
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Introduction to the application manual
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A balanced serial interface for the transmission of digital data in
point-to-point connections.
A generic connector specification that can be used to support
RS422, V.35 and X.21 and others.
Substation Automation.
Strömberg Protection Acquisition, a serial master/slave protocol for
point-to-point communication.
Process interface components that delivers measured voltage and
current values.
Coordinated Universal Time. A coordinated time scale, maintained
by the Bureau International des Poids et Mesures (BIPM), which
forms the basis of a coordinated dissemination of standard fre-
quencies and time signals.
Same as RS449. A generic connector specification that can be
used to support RS422 and others.
A digital signalling interface primarily used for telecom equipment.
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