Steinberg UR24C 2x4 USB Gen 3.1 Audio Interface - Manual (Page 5)

Panel Controls and Terminals
UR24C Operation Manual 5
Rear Panel
[POWER SOURCE] switch
For selecting the port for supplying power to the
UR24C.To supply bus power via the [USB 3.0] port, set
this switch to the [USB 3.0] side. To supply power via the
[5V DC] port, set this switch to the [5V DC] side.
[5V DC] port
For connecting a USB power adapter or USB mobile
battery. This port can be connected to 5-pin micro USB
plug. Use a power supply when connecting the UR24C to
a device that does not supply sufficient bus power, such
as an iPad. (The UR24C does not include a USB power
adapter or USB mobile battery.)
NOTICE
• Read the safety precautions for the USB power adapter or
USB mobile battery that you use.
• Use a USB power adapter or USB mobile battery that can
supply power in compliance with USB standards with a
5-pin micro USB plug.
Output voltage 4.8 V to 5.2 V
Output current 0.9 A or greater
[USB 3.0] port
For connection to a computer or an iOS/iPadOS device.
NOTICE
When connecting to a computer with a [USB 3.0] port,
observe the following to prevent the computer from freezing
or shutting down, as well as corruption or even loss of data.
• Before connecting/disconnecting the USB cable, be sure to
quit all open software applications on the computer.
• Wait at least six seconds between connecting/
disconnecting the USB cable.
NOTE
Apple accessories may be required when connecting the UR24C
with an iOS/iPadOS device. For details, refer to the UR24C
Startup Guide.
[MIDI OUT] jack
For connection to the MIDI IN jack of the MIDI device.
Transmits MIDI signals from the computer.
[MIDI IN] jack
For connection to the MIDI OUT jack of the MIDI device.
Receives and inputs MIDI signals to the computer.
NOTE
• Select [Steinberg UR24C-port1] for the MIDI port when using a
MIDI jack with an iOS/iPadOS app. Please note that [Steinberg
UR24C-port2] is not available.
• Do not activate dspMixFx UR-C when using a MIDI jack. This
may interfere with stable data transmission/reception.
[LINE OUTPUT 1L/1R/2L/2R] jacks
For connection to external devices or monitor speakers
These outputs any stereo output. These jacks can be
connected to RCA pin type (unbalanced) plugs.
[MAIN OUTPUT L/R] jacks
For connection to monitor speakers. These jacks can be
connected to phone-type (balanced) plugs. To adjust the
output signal level, use the [OUTPUT] knob on the front
panel.
Using the [5V DC] port
Even when the UR24C is connected to a computer, you
can supply power via the [5V DC] port by external
power supply if the [POWER SOURCE] switch is set to
the [5V DC] side. This can be used to avoid power
supply problems. For example, ground loops due to
differences in voltage potential can occur if the device
connected to the UR24C is using the same power outlet
as the computer, and audio quality degradation can
occur if the power supply from the computer’s USB port
is not stable.