Installation and Setup
47
Hardware Reference Manual – DXLink Twisted Pair™ Transmitters/Receiver
Serial Data Transfer and IR Flow Control
The illustration in FIG. 33 shows the bidirectional serial data transfer and IR flow control when DXLink Modules are used in Endpoint
Mode with an Enova Digital Media Switcher. The switcher has an integrated NetLinx Central Control Processor which provides native
AMX control at each remote location fed by a DXLink Transmitter or Receiver. Control is sent over twisted pair cable (via the DXLink
ports). This also holds true when Enova DVX Solutions are used.
Optional: DX-TX, HDMI TX, and DX-RX – Wiring for Serial Data Transfer
The RS-232 (serial) ports are the 3-position screw terminal blocks on the rear of the modules to the right of the ICS LAN 10/100
connector. Wire these ports to supply serial data along with the associated video and audio signals from a source device (over the
twisted pair cable between the DX-TX or HDMI TX and the DX-RX) to a destination device or vice versa from the DX-RX to the DX-TX
or HDMI TX. In addition to being directly connected to a device, this port can be connected as an independent native NetLinx
control port from a networked NetLinx Central Controller.
IMPORTANT:
For serial strings to pass through a standalone TX and RX pair (in Extender Mode) without a NetLinx Master acting as
the host, DIP switch #2 Toggle must be set to OFF on each
module
.
The RS-232 port labels are relative to the data flow. On the DX-TX or HDMI TX, data enters the system at the RX label and leaves the
system at the TX label on the Receiver (FIG. 34). The flow is reversed from the Receiver to the Transmitter.
NOTE:
On both modules, the
RS-232 connector pinout is “TX - RX - Ground.”
To wire the RS-232 (serial) connectors on the modules for data transfer:
1.
Wire the RS-232 connectors on the modules according to the pinout directly above the connector.
2.
Use the command RXON to enable this port on the Transmitter and the Receiver. (For complete Serial SEND_COMMAND
programming information, see page 76.)
Serial Control – Endpoint Mode and SEND_COMMANDs
In Endpoint Mode (modules are connected to a switcher), serial operations are handled by the host providing control of the
endpoints. The Master’s programming specifies where the serial commands are sent (this is handled independently from the
routing of the video signals). For additional information on Endpoint Mode, see page 28. For Serial SEND_COMMANDs, see page 76.
FIG. 33
Serial data transfer and IR flow control
FIG. 34
Wire RS-232 ports for serial data transfer
IR and/or
RS-232
HDMI
HDMI
DXLink
DXLink
IR and/or
RS-232
Enova DGX 16
DXLink TX
DXLink RX
RS-232 (serial) connector pinout
TX
D
RX
D
GND
