3
REAR PANEL
output
input
DC out
device #
serial port
link port
baud rate
logic inputs
15 watts
class 2 wiring
50/60 Hz
~
27V
1
2
4
8
16
32
19200
9600
2400
last
MADE IN U.S.A.
BIAMP SYSTEMS
Portland, Oregon
an affiliate of
Rauland-Borg Corp.
output
input
DC out
device #
serial port
link port
baud rate
logic inputs
channel 2
channel 1
output
input
15 watts
class 2 wiring
50/60 Hz
~
27V
1
2
4
8
16
32
19200
9600
2400
last
MADE IN U.S.A.
BIAMP SYSTEMS
Portland, Oregon
an affiliate of
Rauland-Borg Corp.
AC Power Cord: The power transformer provides 27 Volts AC
to the equalizer, and is detachable via a 5-pin DIN connector.
The equalizer has two internal ‘self-resetting’ fuses (there are no
user servicable parts inside the unit). If the internal fuses blow,
they will attempt to re-set after a short period. However, this
may be an indication that the equalizer requires service.
DC Out: This 6-pin Modular jack supplies ±12 Volts DC, for
powering external accessory devices. The EQ281/8 DC Out
provides up to 100mA maximum current. The EQ282/8 DC Out
provides only 10mA maximum current.
Device #: This 6-gang DIP switch allows an equalizer to be
assigned a specific device number. Up to 64 different device
numbers (0~63) may be assigned to allow RS-232 control of
multiple ADVANTAGE
®
products in a common system. From
the factory, an equalizer is assigned Device # 1.
Serial Port: This 9-pin Sub-D (male) connector provides an
RS-232 Serial Port for remote control via computer or third-party
controllers (see RS-232 Control on pg. 8). The Serial Port has
the following pin assignments (left-to-right & top-to-bottom): Pin
1) not used; Pin 2) Receive Data (RxD) input; Pin 3)
Transmit Data (TxD) output; Pin 4) Data Terminal Ready
(DTR) output; Pin 5) Ground; Pin 6) not used; Pin 7)
Request To Send (RTS) output; Pin 8) not used; Pin 9) not
used. PC Control Software and a serial cable are provided for
programming via Windows
®
95 (see Setup on pg. 4).
NOTE:
The Serial Port can also transmit commands which are received
via the Logic Inputs (see Setup on pg. 5).
Link Port: This 9-pin Sub-D (female) connector provides a Link
Port for RS-232 control of multiple ADVANTAGE
®
products (see
RS-232 Control on pg. 9). The Link Port of one device simply
connects to the Serial Port of the next device (and so forth).
Link cables are available as an option (Biamp #909-0057-00).
NOTE: All but the final device in a system should have its ‘last’
switch down (see Baud Rate)
. The Link Port has the following
pin assignments (right-to-left & top-to-bottom): Pin 1) not used;
Pin 2) Transmit Data (TxD) input; Pin 3) Receive Data (RxD)
output; Pin 4) not used; Pin 5) Ground; Pin 6) not used; Pin
7) not used; Pin 8) not used; Pin 9) not used.
NOTE: The
Link Port can also transmit commands which are received via
the Logic Inputs (see Setup on pg. 5).
Baud Rate: This 6-gang DIP switch allows an equalizer to be
assigned a specific communications baud rate. Baud rates
available are 2400, 9600, & 19200 bps. The factory default is
9600 bps. Only one baud rate should be selected at a time, by
raising the corresponding switch. The two switches on the far
right are not used. The switch on the far left (labelled ‘last’) is
used when connecting multiple devices in a ‘Link Port to Serial
Port’ configuration (see Link Port). From the factory, the ‘last’
switch is up. When connecting multiple devices, the ‘last’ switch
must be switched down on all devices except the final (‘last’)
device in the system (the device with no Link Port connection).
Logic Inputs: This 25-pin Sub-D (female) connector provides
16 logic input terminals, plus 9 ground terminals (see Logic
Inputs on pg. 7). Once equalizer settings are adjusted (and
presets are stored) via RS-232 control, the Logic Inputs can be
used to recall presets from non-volatile memory using simple
switches or contact-closures. The EQ281/8 Logic Inputs have
the following pin assignments (right-to-left & top-to-bottom):
Pins 1~8) recall Presets 1~8; Pins 9~16) no operation; Pins
17~25) switch ground points. The EQ282/8 Logic Inputs have
the following pin assignments (right-to-left & top-to-bottom):
Pins 1~8) recall Presets 1~8 (channel 1); Pins 9~16) recall
Presets 1~8 (channel 2); Pins 17~25) switch ground points.
Logic Input functions may be programmed using the PC Control
Software and serial cable provided with the equalizer (see Setup
on pg. 4).
Output: These plug-in barrier strip terminals provide a
balanced line-level output (per channel). For balanced
connections, wire high to (+), low to (-), and ground to (
ý
). For
unbalanced connections, wire high to (+) and ground to (
ý
),
leaving (-) unconnected. Signal level will be reduced by 6dB
when outputs are unbalanced.
Input: These plug-in barrier strip terminals provide a balanced
line-level input (per channel). For balanced connections, wire
high to (+), low to (-), and ground to (
ý
). For unbalanced
connections, wire high to (+), and ground to both (-) & (
ý
). The
Input level is adjustable via RS-232 control, and has a range of
±12dB in 1dB steps, plus off.
