Measurement-computing USB-ERB08 Instrukcja Użytkownika Pobierz pdf (Strona 14)

Chapter 3

Functional Details

Internal components

The USB-ERB08 has the following internal components, as shown in Figure 3-1.

 Two (2) USB connectors

 Two (2) external power connectors

 PWR LED

 USB LED

 Invert/non-invert switch S1 — sets the relay control logic polarity

 Pull-up/pull-down switch S2 — sets the relay power-on state

 Screw terminals

Invert/non-invert

switch (S1)

PWR LED

USB LED

USB I

POWER

OUT

POWER I

USB

OUT

Pull-up/pull-down

switch (S2)

Screw terminals

Figure 3-1. USB-ERB08 components

USB in connector

The USB in connector is labeled USB IN on the board and enclosure. This connector is a USB 2.0 full-speed

input connector that you connect to the USB port on your computer (or USB hub connected to your computer).

This connector supports USB 1.1 and USB 2.0 devices.

USB out connector

The USB out connector is labeled USB OUT on the board and enclosure. This connector is a downstream hub

output port intended for use with other MCC USB Series products only. The USB hub is self-powered, and can

provide 100 mA maximum current at 5 V.

For information on daisy chaining to other MCC USB Series products, refer to Daisy chaining additional

modules to the USB-ERB08 on page 3-3.

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Measurement-computing USB-ERB08 Instrukcja Użytkownika Strona 14