UCERB 24

CyberResearch® Digital I/O

Chapter 3

Functional Details

Internal components

The UCERB 24 has the following internal components, as shown in Figure 3-1.

ƒTwo (2) USB connectors

ƒTwo (2) external power connectors

ƒUSB LED

ƒPWR LED

ƒInvert/non-invert switch (S1) — sets the relay control logic polarity

ƒPull-up/down switch (S2) — sets the relay power-on state

ƒScrew terminals

USB IN POWER IN

USB POWER

OUT OUT

Invert/non-invert switch (S1)

Pull-up/pull-down switch (S2)

PWR LED

USB LED

Screw terminals

Figure 3-1. UCERB 24 components

USB in connector

The USB out connector is labeled USB IN on the board and enclosure.

The USB IN 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, USB 2.0 devices.

USB out connector

The USB out connector is labeled USB OUT on the board and enclosure.

The USB OUT connector is a downstream hub output port intended for use with other CyberResearch 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 CyberResearch products, refer to Daisy chaining additional modules to the USB-ERB08.

External power connectors

The UCERB 24 has two external power connectors labeled POWER IN and POWER OUT on the enclosure. The POWER IN connector is labeled PWR IN and P19 on the board, and the POWER OUT connector is labeled PWR OUT and P20 on the board.

Connect the POWER IN connector to the supplied +9 V external power supply. External power is required to operate the UCERB 24. The POWER OUT connector lets you power additional daisy

chained products from a single external power supply. Depending on your load requirements, daisy chained products may require a separate power supply. Refer to "Power limitations using multiple UCERB 24 devices"

for more information.

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©Copyright 2005 CyberResearch, Inc.