User`s manual

Alcorn McBride Digital Video Machine HD User’s Manual Rev 1.0
36
Input/Output Control
Input Control
The inputs can be
configured for Voltage
or Contact Closure
operation using the
front-panel menu of
the DVMHD.
In addition to the many other methods of control, the Digital Video Machine can also
be controlled using 8 programmable inputs. This interface gives you the power to
interface the DVMHD directly to kiosk buttons, or other IO based systems (such as
PLC’s) without the need for additional control devices.
These inputs are accessible on the 20-pin Input/Output Control connector located on
the rear-panel of the product. Using software settings, they can be configured to
accept either voltage (5-24VDC) or contact closure inputs. The behavior of these
inputs can also be changed to suit your application using software settings.
As you can see from this image, the inputs occupy positions 3-10 of the Input/Output
connector. Position 3 in Input 1, and position 10 is Input 8. Each position has two
contacts; a top and a bottom. When in Contact Closure mode, creating a short-circuit
between these two contacts triggers the input. When in Voltage mode, applying the
negative (-) terminal of a DC power source to the bottom contact and the positive (+)
terminal to the top contact will trigger the input.
How the DVMHD responds to triggered inputs depends entirely upon which mode the
Input Control interface is configured to use. Currently, the available modes are as
follows:
1. Play Mode
2. Encoded Play Mode
3. Combo Mode
Detailed information about these modes can be found in the following sections.