EX-HDU
8
© Copyright 2018 Hall Research, Inc.
7)
RS-232 Port and 4 Digital I/O ports
a.
The RS-232 port typically functions as an output and is used to
turn a projector on or off or control the volume of an external
audio amplifier. The RS-232 port can also be used as an input
to control the EX-HDU itself. For example, users can send a
command to the Receiver that causes it to issue a
corresponding IR output command. Please refer to Software
GUI User's Guide for futher information and command list.
b.
The 4 digital I/O ports each have a signal and a ground contact
(G indicates ground). For convenience a 5v output is also
provided (with 80ma of maximum current available).
Each of the I/O ports can be configured to act as an input or as
an output. When configured as input, they can sense high/low
signal transitions or open/close contact events. System can be
programmed to issue RS232 or IR commands based on those
transitions. For example a simple external toggle switch can be
used to issue on and off commands to a projector. Note that
commands can also be triggered by detecting video, so the
on/off command functions can be automatic.
When the I/O ports are configured as output, they behave as
Open Collector (similar to contact closure) and can withstand
upto 30V DC in open state. These ports can be used to control
equipment such as motorized projector screens.
8)
Optional LAN Port - This connector is only functional on the Receiver
with the IP control option (EX-HDU-R-IP). Users can configure an
internal Web GUI with buttons to control the unit or peripheral
equipment. Please refer to Software GUI User's Guide for futher
information.
9)
Link RJ45 Connector - Connects to the corresponding LINK port on the
Wall Plate Sender.
10)
Power Input - Connects to the power supply provided
