2
FRONT & REAR PANEL FEATURES
on
activity
SPM723
FRONT PANEL FEATURES
Activity LED:
This red LED indicates when control information is
being received via RS-232.
On Indicator:
When the power transformer is plugged in, and AC
power is applied to the SPM723, the red On indicator remains lit.
When power is removed, all 'current' settings (sources, levels,
tone, etc.) will be stored in non-volatile memory and recalled when
power is restored. During Setup the SPM723 may instead be set
to always recall Preset #1 when power is turned back on (see
Setup on pg. 10).
REAR PANEL FEATURES
AC Power Cord:
The power transformer provides 27 Volts AC to
the SPM723, and is detachable via a 5-pin DIN connector. The
SPM723 has two internal ‘self-resetting’ fuses (there are no user
serviceable 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 SPM723 requires service.
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. 16). 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. BiampWin software
and a null-modem cable are provided for programming (see Setup
on pg. 4).
NOTE:
The Serial Port can also transmit commands
received via the Logic Inputs (see Setup on pg. 9).
Link Port:
This 9-pin Sub-D (female) connector provides a Link
Port for RS-232 control of multiple BIAMP products (see RS-232
Control on pg. 16). 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 the Link Switch pressed in
(see below)
. The Link Port has the following pin assignments
(right-to-left & top-to-bottom):
Pin 1)
not used;
Pin
2)
Transmit
Data (TxD) output;
Pin 3)
Receive Data (RxD) input;
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 will also
transmit commands received via the Logic Inputs (see Setup on
pg. 9).
Link Switch:
The Link Switch is used when connecting multiple
devices in a ‘Link Port to Serial Port’ configuration (see Link Port
above). From the factory, the Link Switch is released (out). When
connecting multiple devices, the Link Switch must be depressed
(in) on all devices except the final device in the system (the device
with no Link Port connection).