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4
SS 2.1 MLR/TERM Installation and Operation Manual
OVERVIEW
Product Overview
The SS 2.1 MLR/TERM is a transparent two input, dual output switcher/router with
mechanical latching relays. The SS 2.1 MLR/TERM is perfect for all types of pas-
sive 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. 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 2.1 MLR/TERM can be controlled and mon-
itored 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.
• Remote control via contact closures, 5-volt TTL/CMOS logic levels and/or the
multi-drop RS-232 serial port. TCP/Telnet control/monitoring with our option-
al ESS-1, RS-232 to Ethernet adapter.
• Two SPDT relay outputs for remote channel status.
• Internal silence sensor with front panel LED indicator; separate SPST silence
sensor alarm relay, adjustable alarm delay and restore duration.
• Audio/signal switching via mechanical latching sealed relays utilizing 2-form-C
bifurcated - crossbar silver alloy with gold overlay contacts.
• Removable euro-block screw terminal connectors are used for audio/signal I/O
and remote control connections. Necessary mating plugs are supplied.
• The power-up source selection feature allows the user to select which source is
active at power up, including the last source selected.
• If power is lost, the last selected channel is passed to the output.
• Fully RFI proofed.
• Surge protected internal power supply, domestic power supply provided.
Optional CE 240 Vac 50-60 Hz power supply available.
• Up to three units may be mounted on the optional RA-1 rack shelf. Desk top and
wall mounting is also possible.
Applications
Switching/routing applications include: Analog and/or AES audio sources, Studio
selection, Audio processing selection, EAS audio, RS-232, RS-422 or RS-485 data
signals and telephone lines.
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