LDG SLS-2 Operation Manual - page 8
OPERATION
Desktop / Local Operation
When connected as shown above, pushing the pushbutton on the front of the SLS-2 selects
between the two connected ports. The LED corresponding to the selected port will illuminate,
indicating the active port. An audible click will be heard each time the pushbutton is toggled. This is
the sound of the internal relays clicking.
Note that if no DC power is applied to the SLS-2, the selection defaults to Port 1, and no LEDs
will illuminate. You can take advantage of this situation to create your own “remote mode” as
shown below:
Remote Operation
For mobile installations, or installations where it is not convenient to place the SLS-2 near the
operating position, it is possible to employ a “remote” mode. This “mode” uses the fact that the
SLS-2 relays are non-latching relays, and will revert to their normally closed position when no power
is applied.
To use “remote” mode, push the pushbutton so that it is in the “in” position. Port 2 will be
selected. To remotely switch the SLS-2, you must place a switch (not supplied) in line with the DC
power to the SLS-2. When power is applied, the relays will click on, and Port 2 will be selected and
the Port 2 LED will light up. When power is removed from the SLS-2, Port 1 will be selected, but
no LEDs will be illuminated.
In this manner, if remote operation is desired, you simply have to mount an on/off switch near
the operating position, and use that switch to toggle power to the SLS-2. So long as the pushbutton
is pushed in on the SLS-2, this will allow remote control of the port selection!
APPLICATION INFORMATION
The SLS-2 can be used in a variety of ways, providing the capability to connect a single RJ45-
equipped piece of equipment to two other pieces of equipment. The examples already shown depict
sharing one mic between two radios, or one radio connected to two different mics. But any
equipment with an RJ45 plug and compatible signal levels can be switched.
One example is the Tigertronics SignaLink™
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radio interface device. With the SLS-2, one
SignaLink™ device could be connected to two different radios. The SignaLink™ uses RJ45
connectors for its interface, and provides documentation on how to connect different radios to the
SignaLink™. Using the internal jumpers of the SLS-2, the two radios could even be different types
of radios. Alternately, one radio could connect to two different SignaLink™ devices, for example, to
connect to two different computers.
The internal wire jumpers of the SLS-2 allow you to adapt the wiring of two different pieces of
equipment, for example, allowing you to connect a single microphone to two different radios. Some
examples follow. Before using this feature of the SLS-2, be sure to check the pinouts and signal
levels of BOTH pieces of equipment. Also be sure to check the pin number ordering in your
equipment’s documentation. Not all vendors number the pins in the same left-to-right order.
Failure to take these precautions could damage the connected equipment! LDG assumes no
responsibility for damage to your equipment caused by attempting to connect two pieces of
incompatible equipment.
SLS-2 OPERATIONS MANUAL
MANUAL REV. A
PAGE 8
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SignaLink™ is a registered trademark of Tigertronics.