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Universal 4.1 MLR Installation and Operation Manual
OVERVIEW
Product Overview
The Universal 4.1 MLR/Serial is a transparent four input, one output switcher/router
with mechanical latching relays designed to pass AES/EBU digital audio or stereo
analog audio signals. The Universal 4.1 MLR/Serial is perfect for all types of passive
signal switching via front panel button, USB/RS-232 serial, and contact
closures/logic remote control. The inputs and output feature stereo XLR and
St compatible RJ45’s connectors. Switching is accomplished via mechani-
cal 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 bal-
ancing will match that of the selected input.
Features/Benefits
• Front panel channel selection push buttons with active channel LED indicators.
• The “MUTE” function with LED indicator allows the user to turn off all audio
to the output.
• Front panel Enable switch with enabled LED indicator can be configured to pro-
vide a safety lock to the front panel selection push buttons.
• Signal switching via mechanical latching sealed relays utilizing 2-form-C bifur-
cated – crossbar silver alloy with gold overlay contacts.
• USB and RS-232 serial interfaces for connection to control PC.
• Five input GPI port (PIP triggers or remote control)
• Four normally open relay contact closure outputs for remote channel status.
• Stereo XLR and St RJ45’s connectors. The RJ45’s conforms to the
St wiring standard and passes “DC-LINK” power.
• Removable euro-block screw terminal connectors are used for remote control
connections. Necessary mating plugs are supplied.
• If power is lost, the last selected channel is passed to the output.
• Fully RFI proofed.
• Surge protected internal power supply, 9 VDC universal switching power supply
with domestic connector supplied. International connectors optional.
• Small 1-RU rack chassis.
Applications
Source switching; Studio selection and routing; Audio processing selection; Exciter
input selection; Remote broadcast input selection; STL source selection; PA switch-
ing; IFB selection; Satellite audio channel switching and console monitor input and
output selection.
Inspection
Please examine your UNIVERSAL 4.1 MLR/SERIAL 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 UNIVERSAL 4.1 MLR/SERIAL, a USB type A/B
cable, a modular cable with 9-pin “S9” female D-sub adapter, and a 9 VDC wall
transformer. Manuals may be downloaded from our web site.
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