Relay Interface; Usb Control Interface - Lightware MMX8x4-HT Series User Manual

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3. Product Overview
The Concept
Motorized curtain is pulled back by Relay box when signal received from
the PC over the HDMI input. Relay box is controlled by the GPIO port.
Settings
Step 1. Create an event in Event manager: when signal is present
on Input 5 (I5) then set GPIO pins to low level for Relay box
opening.
Step 2. Also create another event when signal is not present on Input 5
(I5) then set GPIO pins to high level for Relay box closing.
When the PC starts to play the video presentation, the signal is
received over the HDMI input so GPIO pins send signal to Relay box to
open which results pulling back the curtains.
When the presentation is ended, signal ceases on the HDMI input, so
GPIO pins send signal to Relay box to close which results drawing the
curtains
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
the details about the Event Manager settings in the
section.
3.8.5. Relay Interface
INFO: Only the MMX8x4-HT420M model has relay connector.
The matrix contains four relay modules which can be accessed by an
8-pole Phoenix connector. The relays can be controlled by Lightware
protocol commands (LW3) and Event manager actions can be
assigned to the port.
ATTENTION! The device built with normally open (N.O.) contact
relays which means when the unit is not powered (DC plug is
disconnected), the relays will open.
Application of Relays - Example
MIC
HDMI
GPIO Tab section. See also
PC
Event Manager
The Concept
Projection screen is rolled down by relay when the audio signal is
present on the microphone input of the Matrix. When HDMI signal is
not present on the input, the projection screen is rolled up.
Settings of the Matrix
Step 1. Create an event in Event manager: when signal is present on
the microphone input (I9) then set Relay 1. (P1) to be closed.
Condition (on Advanced tab):
/MEDIA/AUDIO/I9.IndicatorNominal=true
Action (on Wizard tab):
Category: Relay, Expression: Close contact on relay, Port: P1
Step 2. Create another event when signal is not present on Input 5 (I5)
then set the Relay 2. (P2) to be closed.
The lecturer can roll down the projection screen by talking to the
microphone. It means, the audio signal is present on the microphone
input (signal peak indicator becomes true), the Relay 1. (P1) closes.
When the presentation is finished, signal ceases on the HDMI input, so
MMX8x4-HT series – User's Manual
Projection screen
Relay 1.
Relay 2.
HDMI
TPS
MAIN MENU
MMX8x4-HT400MC
LIVE > System Settings
POWER Output Ports Input Ports
Control USB
Multiport HDMI and TPS Matrix Switcher
MMX8x4-HT420M TPS receiver
Projector
the Relay 2. (P2) closes and projection screen returns to its enclosure.
See the LDC settings for Relay port in the
the details about the Event Manager settings in the
section.
3.8.6. USB Control Interface
The device can be controlled over front panel USB port (mini B-type
connector). This interface supports LW3 protocol. The interface can
be used to establish a connection to Lightware Device Controller
software.
INFO: USB control operates locally, USB data is not transmitted.
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Relay Tab section. See also
Event Manager