Front of house a/b switch – PRG S400 User Manual 3.1 User Manual
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PRG SERIES 400
®
POWER AND DATA DISTRIBUTION SYSTEM USER MANUAL
Front of House A/B Switch
This component requires software version 2.0 or greater.
The Front of House A/B Switch is connected to a FOH Breakout Module to provide a convenient method for switching
between two sets of DMX512 universes (A and B). With software v2.0, all input universes are given a Source Identifier,
in addition to a Universe Number. The default is Source A. Sources A, B, C or * can be selected at a Breaker Module’s
Menu Display (refer to
on page 39). Sources A or B can be toggled by pressing the appropriate
selector button at the A/B Switch. (Source C is normally reserved for system testing and/or setup and is not selectable
at the A/B Switch. System Source * is omnipresent and is also not selectable at the A/B Switch.)
As an example, two universes from a primary console could be input into the FOH Breakout Module and labeled 0a
and 1a. Two (mirrored) universes could be added from a backup console and labeled 0b and 1b. The system outputs
would be assigned 0 or 1 as appropriate. All universes from both consoles are active on the network all the time,
making it possible to verify that both desks are up and running by checking the source status. A third source (C) has
been provided for an additional input, such as a tech console.
The A/B Switch indicates the current source with state of its backlit selector switches, even if this is changed
elsewhere (i.e., using the Menu Display feature). The selector states indicate the following:
+
A Selector lit - Source A universes are selected.
+
B Selector lit - Source B universes are selected.
+
Both A and B Selectors lit - Source C universes are selected.
Figure 1-16: Front of House A/B Switch Connections and Indicators
CAUTION:
Connecting or disconnecting an A/B Switch while the system is powered up can cause an
apparent switch closure resulting in a change to the source. This action is not recommended during a show-
critical situation.
Note: The A/B Switch requires S400 software version 2.0 or greater, and a S400 7-pin cable.
XLR Output Connector -
connects to FOH Breakout
Module.
Source A Selector
Source B Selector