Gpio Interface; Ir Interface - Lightware UMX-HDMI-140 Series User Manual

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4. Device Concept
4.10. GPIO Interface
The GPIO (General Purpose Input/Output) port is a multi-functional input/output interface to control the
switcher or third-party devices and peripherals. You can establish connection between the controller/
controllable device and the switcher by the 8-pole Phoenix connector. Seven pin's direction is configurable
independently based on needs of the application.
GPIO Options - Example
The Concept
Ceiling lamp is turned off by Relay 1 and projection screen is rolled down by Relay 2 when signal received
from the PC over the VGA input. Both relays are controlled by the GPIO port.
Settings of the Switcher
▪ For Relay 1: create an event in Event manager: when signal is present on Input 1 (I1) then set GPIO pins
to low level for Relay 1 opening. Also create another event when signal is not present on Input 1 (I1)
then set GPIO pins to high level for Relay 1 closing.
For Relay 2: create an event in Event manager when signal is present on Input 1 (I1) then set GPIO pins
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to high level for Relay 2 closing. Also create another event when signal is not present on Input 1 (I1)
then set GPIO pins to low level for Relay 2 opening.
When the PC starts to play the video presentation, the signal is received over the VGA input so GPIO pins
send signal to Relay 1 to open which results turning off the lights. Furthermore GPIO pins also send signal
to Relay 2 to close and the projection screen is rolled down. When the presentation is ended, signal ceases
on the VGA input, so GPIO pins send signal to Relay 1 to close which results turning on the lights and sends
signal to Relay 2 to open so projection screen returns to its enclosure.
ATTENTION!
Please always check the electrical parameters of the devices what you want to control. The
maximum current of one GPIO pin is 30 mA, the maximum total current for the seven pins is 180 mA.
See the LDC settings for GPIO port in the
in the Event Manager section.
GPIO section. See also the details about the Event Manager settings
Applied firmware package: v1.3.0b5 | LDC software: v2.5.6b2
UMX-HDMI-140 series– User's Manual
4.11. IR Interface

ATTENTION! For the complete usage attach the IR emitter unit to the IR OUT and the IR detector unit to
the IR IN connectors. To order IR receiver and transmitter units please contact sales@lightware.com.
Technical Background
The UMX-HDMI-140 switcher contains dedicated IR I/O connection and is able to transmit/receive IR signal
via the IR emitter and detector units. The signal is in pronto HEX format.
Block diagram of the UMX-HDMI-140 Infrared interface
The device has an IR recognizer function. Recognizing IR commands can trigger actions in Event Manager.
The second option is the command injection mode (like at serial interface in the previous section) where
you can send IR commands over LAN. Command injection mode can be enabled and disabled on the input/
output ports.

INFO: All settings are available in the LDC software, see settings in the

INFO: The modulation of output IR signal can be turned off or on by LW3 command, see the
Disable Output Signal Modulation
IR Signal Transmission - Example
Infra section.
section.
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Enable/