Biamp EPI User manual

Biamp
Brand
Biamp
Model
EPI
Type
User manual

This manual is also suitable for

Biamp EPI

Biamp EPI is an Emergency Page Interrupter that allows manual or automatic page-override of program signal. It accepts standard unbalanced line-level input from a program source, as well as unbalanced line-level input (up to 25V) from a paging source, and provides a standard unbalanced line-level output.

The EPI consists of a metal box with an internal circuit board and an external power transformer. Screw terminals on the circuit board provide connections for the page input, program input, and output signals, as well as an external contact-closure (switch) for manual activation of the page-override function.

Biamp EPI

Biamp EPI is an Emergency Page Interrupter that allows manual or automatic page-override of program signal. It accepts standard unbalanced line-level input from a program source, as well as unbalanced line-level input (up to 25V) from a paging source, and provides a standard unbalanced line-level output.

The EPI consists of a metal box with an internal circuit board and an external power transformer. Screw terminals on the circuit board provide connections for the page input, program input, and output signals, as well as an external contact-closure (switch) for manual activation of the page-override function.

EPI
Emergency Page Interrupter
Instructions
®
Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. (503) 641-7287 http://www.biamp.com
an affiliate of Rauland Borg Corp.
The EPI Emergency Page Interrupter (Biamp #909-0056-00) allows manual or automatic page-override of program signal. It accepts
standard unbalanced line-level input from a program source, as well as unbalanced line-level input (up to 25V) from a paging source, and
provides a standard unbalanced line-level output. The EPI uses FET gates for noiseless switching. It is designed for use with Advantage
IWA and RPM Series powered mixers, but may be inserted into any system.
The EPI consists of a metal box (3.35” H x 4.1” W x 1.7” D), with an internal circuit board and an external power transformer. Screw
terminals on the circuit board provide connections for the page input, program input, and output signals, as well as an external contact-
closure (switch) for manual activation of the page-override function. Screwdriver-adjustable trim controls are also provided on the circuit
board for adjustment of the automatic page-override sensitivity, the program return time, and the page input gain.
The EPI may be inserted anywhere between the source (mixer) and the output (amplifier) of a sound system. When used with the
Advantage IWA or RPM Series powered mixers, the EPI is connected at the mixer Main (or Zone) patch point. The mixer Main/Zone Out
terminal is connected to the EPI program input and the EPI output is connected to the mixer EQ In terminal. An external page source is
then connected to the EPI page input. Likewise, the EPI may be connected at the main patch point of virtually any mixer.
1.5"
2.2"
4.1"
page
gain
page
override
threshold
program
return
time
page
input
output
manual
trigger
+
gnd
program
input
+
gnd
+
gnd
WARNING:
TO REDUCE THE
RISK OF FIRE OR
SHOCK, DO NOT
EXPOSE TO MOISTURE.
P/N 909-0056-00
BIAMP SYSTEMS
Portland, Oregon
Emergency Page
Interrupter
ADVANTAGE EPI
1.7"
3.35"
EPI
To install the EPI, first remove the two screws from the front of the metal box. The front cover may now be removed, exposing the internal
circuit board. With the sound system turned off, route cables through the front cover access holes and make the proper signal and contact-
closure connections to the EPI (see diagram below). The Program Input, the Page Input, and the Output are all unbalanced line-level
connections, wired with high to (+) and ground to (gnd). Program Input is from the normal signal source. This can be the output from a
microphone mixer or a music source (CD, cassette, etc.). Page Input is from the paging signal source. This can be the output from a
microphone preamp, a telephone system, or a distributed speaker line. Transformer isolation may be required for proper interface to
telephone or distributed speaker systems. The EPI Output goes to the input of the sound system equalizer or amplifier.
When used with the Advantage IWA or RPM Series powered mixers, insert the EPI at the mixer Main (or Zone) patch point. Connect the
mixer Main/Zone Out terminal to the EPI Program Input (+), and connect the EPI Output (+) to the mixer EQ In terminal. Connect the mixer
Com terminal to either the EPI Program Input (gnd) or the EPI Output (gnd), but not both. Therefore, a simple 2-conductor shielded cable
may be used for these connections. Also use this approach when connecting the EPI at the main patch point of other mixers, where send
goes to EPI Program Input (+) and return goes to EPI Output (+), with a single common ground connection. Finally, connect an external
page source to the EPI Page Input (line-level up to 25V).
For manual activation of page override, wire an external contact-closure across the Manual Trigger terminals of the EPI. This can be a
push-to-talk switch, a relay, or even an ‘open collector’ logic output. Whenever manual triggering is used, Page Override Threshold should
be set fully clockwise (maximum). Once all connections have been made, replace the EPI front cover (access holes are provided for
adjusting controls). Turn the sound system on and set it for appropriate program and output levels. Then adjust Page Level for the desired
‘page-to-program’ level. Page Level is factory set fully counter-clockwise (off). If automatic page override is being activated by signal
present at Page Input, adjust Page Override Threshold for desired sensitivity (not triggered by ambient noise). This control is factory set
fully counter-clockwise (minimum). Program Return Time has a range of 0.8~5.0 seconds, and is factory set for 0.8 seconds (minimum).
page
gain
page
override
threshold
program
return
time
page
input
output
manual
trigger
+
gnd
program
input
+
gnd
+
gnd
program
input
cable
entrance
50K
10KC
manual
trigger
cable
entrance
output
cable
entrance
page
input
cable
entrance
page
input
page
override
threshold
+
gnd
+
gnd
output
manual
trigger
page
gain
program
return
time
EPI Block Diagram
program
input
+
gnd
FET
gate
FET
gate
control
circuit
EPI
585.0956.00
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Biamp EPI User manual

Biamp
Brand
Biamp
Model
EPI
Type
User manual
This manual is also suitable for

Biamp EPI

Biamp EPI is an Emergency Page Interrupter that allows manual or automatic page-override of program signal. It accepts standard unbalanced line-level input from a program source, as well as unbalanced line-level input (up to 25V) from a paging source, and provides a standard unbalanced line-level output.

The EPI consists of a metal box with an internal circuit board and an external power transformer. Screw terminals on the circuit board provide connections for the page input, program input, and output signals, as well as an external contact-closure (switch) for manual activation of the page-override function.

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