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4
SS 4.1 MLR/RJ Installation and Operation Manual
OVERVIEW
Product Overview
The SS 4.1 MLR/RJ is a transparent four input, one output RJ45 audio switcher/router
with mechanical latching relays. The SS 4.1 MLR/RJ is perfect for all types of passive
signal switching via front panel switches, contact closures and/or serial RS-232. The
switching is accomplished with mechanical latching gold contact relays, which means
that the unit can route a signal in either direction and it will keep routing signal 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. The
SS 4.1 MLR/RJ can be controlled and monitored locally and/or with simple contact
closures to ground, as well with multi-drop RS-232 serial commands.
Features/Benefits
• Front panel input channel selection push buttons with active channel LED indicators.
• Front panel “Mute” switch, with LED indicator, to turn off all audio to the out-
put.
• Front panel “Enable” switch, with LED indicator, can be configured to provide
a safety lock to the front panel selection push buttons.
• Audio/signal switching via mechanical latching sealed relays utilizing 2-form-C
bifurcated - crossbar silver alloy with gold overlay contacts.
• Four 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.
• Internal silence sensor with front panel LED indicator, SPST silence sensor alarm
relay, and adjustable alarm delay and restore duration.
• Eight input GPI port (PIP 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.
• Four open collector outputs for remote channel status.
• Power-up selection of inputs to outputs, 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 three units may be mounted on the optional RA-1 rack shelf. Desktop and
wall mounting is also possible.
Applications
Automation source switching with eight PIP/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 switch-
ing; EAS audio switching; ISDN or Phone hybrid feed selection; IFB selection;
Satellite audio channel switching and console monitor input and output selection.
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