Digital I/O Ports - Extron electronics DMP 128 User Manual

Digital I/O Ports
The DMP 128 provides twenty digital I/O ports that can trigger external events from
DMP 128 actions, or allow external events to trigger DMP 128 actions. DSP Configurator
provides pre-configured scripts with a fixed set of common trigger or event combinations.
When selected, the script is compiled and placed onto the File Management system of the
device. For more advanced or custom scripts, contact an Extron Electronics Applications
Engineer.
When there are no scripts active, the digital I/O ports default to DI (digital input) and inactive
('Logic Hi' ≈ +5 VDC). The DI detects a Logic Hi as +5 VDC and Logic Low (active) as less
than +1 VDC.
A DO (digital output) sends a Logic Lo as less than +1 VDC and a Logic Hi as +5 VDC. For
every script that involves a DO, two versions are available to provide either a Logic Hi or a
Logic Lo response to any action. The alternate script is designated as "Reverse DO".
To build a script and place it into the DMP 128 File Management system:
1.
2.
3.
From the main menu, click Tools > Configure Digital I/O > Build Digital
I/O Configuration.
Figure 60. Build Digital I/O Configuration Tool
A dialog box opens with a list of pre-configured scripts.
Select a script from the Select a Digital I/O Configuration section. The
Event Description panel describes the script and how the digital I/O ports act while
the script is running.
Figure 61. Configure Digital I/O Dialog
Highlight the desired script and click OK.
A dialog box opens, verifying the file successfully uploaded to the device.
NOTE: When performing this procedure in Emulate mode, the connection dialog
opens. The DSP Configurator connects and then disconnects during the
procedure, returning to Emulate mode when completed.
DMP 128 • Software Control 89