Extron Electronics DMP 44 LC User Guide - Manual (Page 14)

The digital input port is used to monitor TTL level digital signals. Voltages greater than
2 V indicate a logic “high” signal while voltages less than .8 V indicate a logic “low.”
NOTE: These ports are configured via DSP Configurator (see the “ Digital input
ports ” section for additional information).
Do not tin the wires!
1
2
3
_
Digital I/O Wiring
Both the RS-232 and digital input connectors may be used simultaneously by using a
6-pin captive screw connector with two wires sharing the same ground connector (see
the diagram below).
RS-232 DIGI IN
Tx Rx 1 2 3
g
Reset button — The recessed reset button is used to access various modes of resets.
The single green power LED on both the front and rear panels indicates what mode
of reset was accessed (see the “
DMP 44 LC Hardware Reset Modes ” section for
additional details).
USB Configuration port (front panel)
A front panel configuration port uses an Extron USB A Male to USB Mini B Male
Configuration Cable, 26-654-06 for connection to a PC computer via the USB port.
The DMP USB driver must be installed prior to using the port (see the “
Install the USB
Driver ” section for USB driver installation details).
DMP 44 LC • Installation 8