Installation and Setup
57
Instruction 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: Multi-Format TX, HDMI TX, and HDMI 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 Multi-Format TX
or HDMI TX and the HDMI RX) to a destination device or vise versa from the HDMI RX to the Multi-
Format 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.
The RS-232 port labels are relative to the data flow. On the Multi-Format 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 95.)
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 41. For Serial SEND_COMMANDs, see page 95.
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
TXD
RXD
GND
