Indicators and Connections

Front Panel

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The USB-C-Switch front panel contains all USB ports: Control, Common, and Mux 0-3, along with port and system LED indicators. The control port supports USB Type C power at 5 V, 3 A.

Rear Panel

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The rear panel contains the Input Power Connector, Ethernet port, and the Expansion Connector.

Input Power Connector

Power for the USB-C-Switch Pro can be provided by the VBUS line on the control port or by external power on the rear panel connection, VINPUT. A Euro-style 2-pin terminal block (“Euroblock”) is used for the external power connection, with pin spacing of 3.81 mm (0.150”).

Expansion Connector

The USB-C-Switch expansion connector is Euro-style 8-pin terminal block (“Euroblock”) with pin spacing of 3.50 mm (0.138”). This interface provides additional mechanisms for expandability and test scenarios. Rail 0 is a software-controlled current-limited fixed 5 V source (disabled by default). IO1 is a general-purpose input and output that can also be configured as a selector to cycle through Mux channels.

Expansion connector pinout

Connection Name

Pin Number

Description

GND

1

Ground

RX

2

RS-232 Serial Receive (data to USBCSwitchPro)

TX

3

RS-232 Serial Transmit (data from USBCSwitchPro)

IO1

4

General Purpose Input//Selector

IO2

5

I2C SDA

IO3

6

I2C SCL

GND

7

Ground

5V (Rail 0)

8

Current-limited 5 V source

LED Indicators

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LED Indicators and Function

Type

Icon

LED Name

Color                

Description

System

person Person

User LED

Bled Blue

User-controllable LED

pwr Power Icon.

Power/Watchdog

Rled Red /

Mled Magenta

Alternating Red and Magenta when powered

Control

chain Chain Links

BrainStem Link

Yled Yellow

Link present

heart Heart

BrainStem Heartbeat

Gled Green

Blink when Heartbeat received

Common

LR Left/Right Arrow

Connection Status:

Solid = connected

Gled Green

Unflipped

Yled Yellow

Flipped

UD Up/Down Arrow

Partner detection

Gled Green

VBUS present or PD negotiated

Mux Ports

LR Left/Right Arrow

Mux selection:

Solid = enabled

Blinking = disabled

Bled Blue

Channel selected

Yled Yellow

Split mode

up Up Arrow

Partner Detection

Gled Green

VBUS present or PD negotiated

Ethernet

Left

Ethernet Activity

Gled Green

Blinks with Ethernet activity

Right

BrainStem Link

Aled Amber

BrainStem connection established

Power

The USB-C-Switch Pro can either be bus-powered via the Control Port, or through the 12 V DC input using the included power adapter.

Unit Reset

The USBC-Switch Pro can be reset to factory default settings using the reset button on bottom of the unit. Pressing the reset button once will restart the USBC-Switch Pro as if it had been power cycled. To restore factory default settings, press twice within 5 seconds.