Installation and Setup
59
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 vi
c
e 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 on each module.
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 92.)
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 44. For Serial
SEND_COMMANDs, see page 92.
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
