SS 8.1 MLR/RJ Installation and Operation Manual
OVERVIEW
Product Overview
The SS 8.1 MLR/RJ is a transparent eight channel audio switcher/router with mechanical
latching relays. The SS 8.1 MLR/RJ is perfect for all types of passive signal switching con-
trolled via front panel switches, contact closures and/or multi-drop RS-232 serial. Switching
is accomplished with mechanical latching gold contact relays, which means that the unit can
route a signal in either direction and keep routing signals even after losing power. Due to
the passive nature of the switching, any input level and impedance can be used. Inputs may
be balanced or unbalanced, while output levels, impedance, distortion, noise, and balancing
will match that of the selected input.
Features/Benefits
• Front panel channel selection push buttons with active channel LED indicators.
• Audio “MUTE” function allows the user to mute/turn off all audio to the output.
• Front panel Enable switch can be configured to provide a safety lock to the front panel
selection push buttons.
• Audio/signal switching via sealed mechanical latching relays utilizing 2-form-C bifurcat-
ed - crossbar silver alloy with gold overlay contacts.
• Eight shielded RJ45 audio input jacks and one shielded RJ45 audio output jack.
• Removable euro-block screw terminal connectors are used for remote control connections.
Necessary mating plugs are supplied.
• Output audio silence sensor with front panel LED indicator, SPDT/SPST silence sensor
alarm relay with adjustable alarm delay and restore duration. May be disabled.
• Eight input GPI port (PIP/triggers or Remote Control) with LED indicator.
• Remote control via contact closures, 5-volt TTL/CMOS logic levels and/or the multi-drop
RS-232 serial port.
• Eight open collector outputs for remote channel status.
• Power-up selection of input to output, mute or last source selected. If power is lost, the last
selected channel is passed to the output.
• Fully RFI proofed.
• Surge protected internal power supply, universal switching power supply with domestic
connector supplied. International power supply optional.
• Up to two units may be mounted on the optional RA-1 rack shelf. Desktop and wall mount-
ing is also possible.
Applications
Automation source switching with eight trigger inputs; Studio selection and routing; Audio
processing selection; Exciter input selection; Remote broadcast input selection; STL source
selection; Multiple station program on-hold and/or PA switching; EAS audio switching;
Codec or Phone hybrid feed selection; IFB selection; Satellite audio channel switching and
console monitor input and output selection.
Inspection
Please examine your SS 8.1 MLR/RJ carefully for any damage that may have been sustained
during shipping. If any damage is present, please notify the shipper immediately and retain
the packaging for inspection by the shipper. The package should contain the SS 8.1 MLR/RJ,
a modular cable with 9-pin “S9” female D-sub adapter, and a 9 VDC power supply. Manuals
may be downloaded from our web site.
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