CyberResearch UCERB 24, Руководство пользователя

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Chapter 3
Functional Details
Internal components
The
UCERB 24
has the following internal components, as shown in Figure 3-1.
ƒ Two (2) USB connectors
ƒ Two (2) external power connectors
ƒ USB LED
ƒ PWR LED
ƒ Invert/non-invert switch (S1) — sets the relay control logic polarity
ƒ Pull-up/down switch (S2) — sets the relay power-on state
ƒ Screw terminals
Invert/non-invert
switch (S1)
PWR LED
USB LED
USB IN
POWER
OUT
POWER IN
USB
OUT
Pull-up/pull-down
switch (S2)
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 su9 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.
UCERB 24 CyberResearch
®
Digital I/O
1 4 ©Copyright 2005 CyberResearch, Inc.