Specifications

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SS 4.1 MLR Installation and Operation Manual
OVERVIEW
Product Overview
The SS 4.1 MLR is a transparent four input, one output switcher/router with
mechanical latching relays. The SS 4.1 MLR is perfect for all types of passive sig-
nal 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 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 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 channel selection push buttons with active channel LED indicators.
• The audio “MUTE” function allows the user to turn off all audio.
• Front panel Enable switch 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.
• Internal silence sensor with front panel LED indicator, SPST silence sensor alarm
relay with 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.
• Removable euro-block screw terminal connectors are used for audio/signal I/O
and remote control connections. Necessary mating plugs are supplied.
• 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 connectors optional.
• Up to three units may be mounted on the optional RA-1 rack shelf. Desk top and
wall mounting is also possible.
Applications
Automation source switching with eight trigger inputs; Studio selection and routing;
Audio processing selection; Exciter input selection; Remote broadcast input selec-
tion; STL source selection; Multiple station program on-hold and/or PA switching;
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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