Measurement Computing USB-2527 - Manual (Page 10)

USB-2527 User's Guide Installing the USB-2527
10
Installing the USB-2527
To connect the USB-2527 to your system, turn your computer on, and connect the USB cable to a USB port on
your computer or to an external USB hub that is connected to your computer. The USB cable provides power
and communication to the USB-2527.
When you connect the USB-2527 to a computer for the first time, a Found New Hardware dialog opens when
the operating system detects the device. When the dialog closes, the installation is complete.
The power LED (bottom LED) blinks during device detection and initialization, and then remains solid as long
as the USB-2527 has sufficient power. If the power provided from the USB is not sufficient, the LED turns off,
indicating you need a PS-9V1AEPS-2500 power supply.
When the board is first powered on, there is usually a momentary delay before the power LED begins to blink,
or come on solid.
Connect external power, if used, before connecting the USB cable to the computer
If you are using a PS-9V1AEPS-2500 power supply, connect the external power cable to the USB-2527 before
connecting the USB cable to the computer. This allows the USB-2527 to inform the host computer (when the
USB cable is connected) that the board requires minimal power from the computer’s USB port.
In general, all standoffs should be used to mount the board to a metal frame.
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the
USB-2527, or you may lose data and/or your ability to communicate with the USB-2527.
Configuring the hardware
All hardware configuration options on the USB-2527 are software-controlled. You can select some of the
configuration options using InstaCal, such as the analog input configuration (16 single-ended or 8 differential
channels), and the edge used for pacing when using an external clock. Once selected, any program that uses the
Universal Library initializes the hardware according to these selections.
You need a PS-9V1AEPS-2500 power supply (sold separately) when there is insufficient power from the USB
port. However, you can use this power supply in any scenario.
The standoff at this location
connects to the USB-
2527
’s internal chassis
plane for shunting
electrostatic discharge.
The standoff at this location
connects to the USB
chassis for shunting
electrostatic discharge.