Appendix G - External Serial Controllers
286
Enova Digital Media Switchers - Hardware Reference Manual
However, it will attempt to install a new virtual COM port using the new port. If completed, the new port will be
assigned a different COM number.
IMPORTANT:
You must identify the virtual COM port assigned to the USB connector to enable communication between the
Control PC and the switcher.
11.
Set up and run the desired method of control:
AMX Controller
– For control programming information, see the manual for the specific controller.
Terminal Emulation
– Open the program (see "Terminal Emulation" on page 287). Check to be sure the COM port is
set for the port determined in the previous steps. Set the settings to match the Enova DGX 100 Series defaults:
baud rate – 115200
data bits – 8
parity – 1
stop bits – none
flow control – 1
IMPORTANT:
If power is cycled on the enclosure, the USB connection must be reestablished. (1) Remove the USB cable, (2)
close the software application in use, (3) reconnect the USB cable to the same USB connector that was used previously,
and (4) reopen the communication software.
External Serial Control via DB-9 Control Port
The DB-9 Control port provides a standard serial connection and can be used to connect directly to a control application
or to a PC running a terminal emulation program. To access the terminal emulation program in NetLinx Studio, go to Tools/
Terminal Session.
PC Requirements for Serial Control
Windows 7 or Windows 8
Terminal emulation program
Serial port or USB port
RS-232 Pin Diagram
A serial connection via the Control port requires a null modem cable that matches the pin diagram in FIG. 176 for RS-232
without hardware flow control. Enova DGX Switchers require pins 2, 3, and 5 only (FIG. 176):
Establishing External Serial Control Via the Control (DB-9 serial) Port
1.
Plug one end of the null modem serial cable into the Control port on the enclosure (FIG. 177):
2.
Plug the other end of the serial cable into the serial port on the serial controller.
3.
If not already on, apply power first to the switcher and then to the source and destination devices (see page 66).
CAUTION:
To avoid system damage, follow the power-up sequence on page 66. We recommend attaching all power
cords to a surge protector and/or AC line conditioner.
4.
Setup and run the desired method of control:
AMX Controller – For control programming information, see the specific controller’s manual.
Terminal emulation – Open the program, set the COM port settings to match the following default values:
FIG. 176
RS-232 null modem cable pin diagram, no hardware flow control
FIG. 177
RS-232 null modem cable pin diagram, no hardware flow control
PC: DB-9
Enova DGX: DB-9
CONTROL (Serial) port
Cable to serial control device / system