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USB-SSR08 User's Guide
USB in connector
The USB in connector is labeled
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
hub output port intended for use with other MCC USB devices 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 devices, refer
to Daisy chaining multiple USB-SSR08 devices on page 14.
External power connectors
The USB-SSR08 has two external power connectors labeled
The
connector is labeled
POWER IN
on the PCB.
Connect the
POWER IN
operate the USB-SSR08. The
devices from a single external power supply. Depending on your load requirements, daisy-chained devices may
require a separate power supply. Refer to Power limitations using multiple USB-SSR08 devices on page 15 for
more information.
USB LED
The
LED indicates the communication status of the USB-SSR08. This LED uses up to 5 mA of current
USB
and cannot be disabled. The table below explains the function of the USB LED.
USB LED
On steadily
Blinking
PWR LED
The USB-SSR08 incorporates an onboard voltage supervisory circuit that monitors the external 9 V power. If
the input voltage falls outside of the specified ranges the
function of the PWR LED.
PWR LED
Indication
Steady green
External power is supplied to the USB-SSR08.
Off
Power is not supplied by the external power supply, or a power fault has occurred. A power fault
occurs when the input power falls outside of the specified voltage range of the external supply
(6.0 V to 12.5 V).
on the enclosure and on the PCB. This connector is a USB 2.0 full-
USB IN
on the enclosure and on the PCB. This connector is a downstream
USB OUT
on the PCB, and the
PWR IN
connector to the supplied +9 V external power supply. External power is required to
connector lets you power additional daisy-chained MCC USB
POWER OUT
USB LED Indications
Indication
The USB-SSR08 is connected to a computer or external USB hub.
Initial communication is established between the USB-SSR08 and the computer, or data is being
transferred.
PWR LED Indications
and
POWER IN
POWER OUT
POWER OUT
LED shuts off. The table below explains the
PWR
12
Functional Details
on the enclosure.
connector is labeled
PWR OUT
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