Trilithic EASyCAST, Hardware Installation Manual

Page: 24 / 44

EASyCAST - Installation Manual
22
TTL I/O expansion (optional AES/EBU digital audio switch and contact closure input)
AES/EBU Audio - Provides a synchronized AES/EBU audio switch for in-line replacement
of programming audio during EAS operations. If an input is provided (from a station
source), the output sample rate will be equal to the input sample rate. If no input is
provided, the output sample rate will be 48KHz.
AES/EBU input 110
Ω Ω Ω Ω Ω
XLR female
Pin 1: Ground/drain
Pin 2: Ba
Pin 3: Balanced -
AES/EBU output 110
Ω Ω
Ω Ω
Ω
XLR male
Pin 1: Ground/drain
Pin 2: Ba
Pin 3: Balanced -
Contact closure inputs - provide a means for controlling the EASyCAST using
automation equipment or operator switchboard.
Input 1, abort - When closed, causes any EAS message being received to be
disregarded, and any EAS message being transmitted to be stopped. The
EASyCAST will attempt to stop all video displays and audio switches, then return to
monitoring for EAS messages.
(G) Contact ground
(1) 5mA pull-up sense input (5 Volt @ 0mA)
Input 2, trigger - When closed, causes any EAS message waiting to be transmitted to
begin transmission, regardless of the state of the hold-off input (input 3).
(G) Contact ground
(2) 5mA pull-up sense input (5 Volt @ 0mA)
Input 3, hold-off: Configurable for active-open or active-closed. When active, this
prohibits any EAS message waiting to be transmitted from starting transmission except by
the trigger input (Input 2), user activation, or the event delay time-out (configurable).
(G) Contact ground
(3) 5mA pull-up sense input (5 Volt @ 0mA)