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4
SS 2.1 Term III Installation and Operation Manual
DESCRIPTION
PRODUCT DESCRIPTION
The SS 2.1/Term III passively switches or routes a variety of electrical signals to a
destination. The SS 2.1/Term III selects any one of 2 stereo inputs to a single stereo
output. The SS 2.1/Term III provides PASSIVE switching through gold contact
relays. The passive switching means that the unit can route a signal in either direc-
tion (any one of 2 stereo inputs to a single destination, or a single source to any one
of 2 destinations). 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. In
addition to their normal use with audio signals, the unit can also be used to switch
digital signals and telephone lines.
FEATURES
• Operation by front panel switches and LED indicators, contact closures, 5-volt
TTL/CMOS logic levels and/or the multi-drop RS-232 serial port.
• Removable screw terminals (Euro) are provided for audio and remote control
connections.
• Audio switching via sealed relays utilizing 2-form-C bifurcated-crossbar silver
alloy with gold overlay contacts.
• Microprocessor control with non-volatile memory.
• The Power-Up feature allows the user to select which one source is active at
power up, including the last source selected.
• Three logic-switching modes.
• The ENABLE switch provides a safety lock to the front panel selection switch-
es.
• The audio MUTE switch allows the user to turn off the audio output when acti-
vated.
• Source number one is configured by default to route audio to the output in the
case of loss of power to the unit.
• Non-selected sources are terminated with 10K
Ω
, load resistors.
• Relays provided for remote status.
• Desktop, wall mount or rack mount three units on the RA-1, 1-RU rack shelf.
APPLICATIONS
EAS audio switching, any type of stereo, monaural, composite audio, AES/EBU,
ISDN, RS-232/422/485, telephone lines switching, multiple station program on-hold
and/or PA switching.
