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4. Installation
4.2. Electrical Connections
4.2.1. HDMI Input and Output Ports
The matrix switchers are assembled with standard 19-pole HDMI connectors with screw lock for inputs and
outputs. Always use high quality HDMI cable for connecting sources and displays.
4.2.2. Analog Stereo Audio
5-pole Phoenix connector is used for balanced analog audio input or output. Unbalanced audio signals
can be connected as well. See more details about the balanced and unbalanced I/O port wiring in the
Audio Cable Wiring Guide
section.
Analog audio connector and plug pin assignments
Compatible Plug Type
Phoenix
Combicon series (3.5mm pitch, 5-pole), type: MC 1.5/5-ST-3.5.
®
4.2.3. Microphone IN
DIFFERENCE:
MMX8x8-HDMI-4K-A and MMX8x8-HDMI-4K-A-USB20 models have no microphone input.
The 3-pole Phoenix connector is used for the analog microphone input. 48V phantom powering is available
via connector.
Microphone connector and plug pin assignments
INFO: The maximum rating of Microphone input is 48V and 7mA.
Compatible Plug Type
Phoenix
Combicon
series
®
You can find more information about the wiring in the
connection in
Installation Guide for Connecting a Microphone
Pin nr.
Signal
1
Left+
2
Left-
3
Ground
4
Right-
5
Right+
Pin nr.
Signal
1
Ground
2
-
3
+
(3.5mm
pitch,
3-pole),
type:
MC
Audio Cable Wiring Guide
section and about the
section.
Applied firmware package: v1.2.2b5 | LDC software: v2.2.1
MMX8x4-HT series – User's Manual
4.2.4. RS-232 Connector
The receiver contains a 3-pole Phoenix connector which is used for RS-232 serial connection.
RS-232 Output Voltage Levels
▪
Logic low level: 3V .. 15V
Logic high level: -15V .. -3V
▪
Compatible Plug Type
Phoenix
Combicon series (3.5mm pitch, 3-pole), type: MC 1.5/3-ST-3.5.
®
You can find more information about RS-232 in
4.2.5. Infra/ Serial TTL Connector
The matrix switcher contains a 2-pole Phoenix connector. Depending on the destination port, it can be used
for TTL serial data output or Infra emitter.
TTL digital signal levels can be set to high or low level (Push-Pull).
Using a receiver with at least 1k impedance to any voltage between 0V and 5V, the output voltages are:
Logic low level: 0 .. 0.25V
▪
▪
Logic high level: 4.75 .. 5.0V
In that case the actual current is:
Logic low level: -5mA < current < 0mA (sink)
▪
▪
Logic high level: 0mA < current < 5mA (source)
Compatible Plug Type
Phoenix
Combicon series (3.5mm pitch, 2-pole), type: MC 1.5/2-ST-3.5.
®
You can find more information about TTL in the
1.5/3-ST-3.5.
Interface
section.
Pin nr.
Signal
1
Ground
2
TX data
3
RX data
RS-232 connector pin assignments
Serial Interface
section.
Pin nr.
Signal
1
Ground
2
TX data
Infra/ TTL serial connector pin assignments
Serial Interface
section and about Infrared in the
29
Infra
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Troubleshooting
