Specifications

6
REMOTE CONTROL
An optional wall-mount push-button Controller
with status indicators (see diagram below) is available for the SPM412e. Remote control
affects Channel Select and Main Level (plus mute). Remote control may be added at any time, and does not require the SPM412e to be
modified, opened, or removed from a rack. Remote control of the SPM412e is also possible via third-party controllers, which utilize a
carrier-stripped serial bit-stream (see Translator on next page).
Controller
: The Controller is a ‘hard-wired’ control, which is powered b
y
the SPM412e. Ther
e
are no batteries to wear out, and it is not easil
y
lost or stolen. The Controller ma
y
be wired up t
o
2000 feet from the SPM412e, using 2-conductor shielded cable
(
not included
)
. The Controlle
r
overrides all similar commands which mi
g
ht be initiated from the front panel of the SPM412
e
(
see NOTE below
)
. To install Controller, first remove mountin
g
box from circuit board & fron
t
panel. Route cable through "knock-out" hole on rear of mountin
g
box. Install mountin
g
box in
wall or panel. Three screw terminals on circuit board
(
‘GND’, ‘IR2’, & ‘IR3’
)
correspond t
o
‘Remote’ terminals on rear panel of SPM412e. Connect cable shield to ‘GND’ terminals at each
end. Use conductors to connect ‘IR2’ to ‘IR2’ & ‘IR3’ to ‘IR3’. Install circuit board & front panel
on mountin
g
box. The Controller has seven buttons which control functions on the SPM412e.
The Channel Select buttons & indicators provide the same functions as those on the SPM412
e
front panel
(
includin
g
the abilit
y
to select more than one stereo line input at a time
)
. The Main
Level buttons & displa
y
provide the same functions as Main Level on the SPM412e front panel
(except that onl
y
a sin
g
le indicator will li
g
ht to displa
y
the level settin
g
, and it will dim when th
e
output is muted). The Controller also includes an infrared detector, which allows it to operate a
s
an Infrared Receiver as well. NOTE: Two additional screw terminals
(
‘GND’ & ‘KEY SWI’
)
allo
w
an external key-switch (or contact-closure) to ‘lock-out’ control of Channel Select and/or Main
Level functions from the Controller. These functions will then be temporaril
y
available from th
e
SPM412e front panel, as long as the ‘lock-out’ is maintained. When ‘lock-out’ is released, th
e
Controller memory will then reassert its previous settings on the SPM412e. A 4-
g
an
g
DIP switch
on the Controller circuit board allows custom functions to be assigned, such as Channel Selec
t
‘lock-out’, Main Level ‘lock-out’, key-lock triggering, and infrared detector defeat (instruction
s
included with Controller).
MAIN LEVEL
SPM412e Controller
CHANNEL SELECT
1
2
3
4
max
min
MUTE
Translator: When the adjacent switch is depressed, the ‘hi’, ‘lo’, & ‘gnd’ terminals on the SPM412e rear panel Remote connector provide
a ‘Translator’ input, which allows third-party controllers (such as AMX
®
or CRESTRON
®
) to directly interface to, and control, the SPM412e.
To interface a third-party controller to the Translator input, connect the controller output to either the ‘hi’ or ‘lo’ terminal on the SPM412e
(depending upon high or low idle signal from the controller) and the controller ground to the SPM412e ‘gnd’ terminal. For reliable operation
it is recommended that the SPM412e be located within 10 feet of the third-party controller. The Translator input is compatible with bi-polar
signal voltages (such as -12V to +12V RS-232 signal levels) as well as uni-polar signal voltages (such as 0V to +5V TTL or CMOS logic
signals). The maximum input voltage range for the Translator input is -15 Volts DC to +15 Volts DC, The switching threshold for the
Translator input is approximately +2 Volts DC (at idle-high terminal) or +3 Volts DC (at idle-low terminal). Input impedance for the
Translator signal is about 6k ohms. The third-party controller must be programmed to output a ‘carrier-stripped’ bit-stream in the Biamp
format (contact the controller manufacturer to determine if their device driver library supports the Biamp format).
AMX is a registered trademark of AMX Corporation.
CRESTRON is a registered trademark of CRESTRON Electronics, Inc.
RANGER is a registered trademark of Rauland-Borg Corp.