Broadcast Tools SS 2.1 MLR/BNC - BNC Switcher/Router

MSRP: $329.00
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The SS 2.1 MLR/BNC is a transparent two input, dual output switcher/router with mechanical latching relays and BNC connectors. The SS 2.1 MLR/BNC is perfect for composite/MPX or other 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. 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/BNC can be controlled and monitored locally and/or with simple contact closures to ground, as well with multi-drop RS-232 serial commands.

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.

• Two SPDT relay outputs for remote channel status

• Audio/signal switching via mechanical latching sealed relays utilizing 2-form-C bifurcated – crossbar silver alloy with gold overlay contacts.

• BNC connectors are used for audio or signal I/O connections, and removable euro-block screw terminal connectors are used for remote control and status to simplify wiring and service, euroblock 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, power adapter with domestic connector supplied. International power supply optional.

• Up to three units may be mounted on the optional RA-1 rack shelf. Desk top and wall mounting is also possible.



  • Inputs/Outputs: Any input level and impedance can be used. Inputs may be balanced or unbalanced. Output levels, impedance, distortion, noise and balancing will match that of the selected input.
  • Switching Method: Passive. Mechanical latching sealed relays utilizing 2-formC bifurcated-crossbar silver alloy with gold overlay contacts.
  • Logic: Flash microprocessor with non-volatile memory.
  • Operation Control: Front Panel - Momentary switches. Remote - Momentary or sustained, compatible with 5 volts CMOS/TTL logic, open collector or contact closures to ground. Serial - Multi-drop RS-232, 2400, 9600, 19200, 38400 8,N,1.
  • Status: Front Panel - LED Indicators. Remote - Two SPDT relays. 1-amp 30 vdc. Refer to the fractional schematic and/or text on the rear panel for connection details.
  • Interfacing: I/O - BNC Remote control - Rear panel pluggable screw terminals. Mating connectors supplied. pin D-Sub adapter supplied.
  • Power Requirements: 7.5 to 12 VDC @ >500 ma. 120 Vac 50-60 hz transformer supplied.
  • Physical Dimensions: 5.65” x 7.10” x 1.575” (WDH)
  • Weight: 2.0 lb.
  • Shipping Weight: 3.0 lb.
  • Options: RA-1 rack shelf, holds three units


One Year Warranty