4. Installation
MMX8x4-HT series – User's Manual
29
Applied firmware package: v1.2.2b5 | LDC software: v2.2.1
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
section.
Pin nr.
Signal
1
Left+
2
Left-
3
Ground
4
Right-
5
Right+
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.
Pin nr.
Signal
1
Ground
2
-
3
+
Microphone connector and plug pin assignments
INFO: The maximum rating of Microphone input is 48V and 7mA.
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 the wiring in the
section and about the
connection in
Installation Guide for Connecting a Microphone
section.
4.2.4.
RS-232 Connector
The receiver contains a 3-pole Phoenix connector which is used for RS-232 serial connection.
Pin nr.
Signal
1
Ground
2
TX data
3
RX data
RS-232 connector pin assignments
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
section.
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.
Pin nr.
Signal
1
Ground
2
TX data
Infra/ TTL serial connector pin assignments
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
section and about Infrared in the
section.
