Manual USB-IDIO-16
5
Screw Terminal Accessory Board
A Screw Terminal Accessory board is included with the unit, except for the Economy (E) and OEM
versions. The board provides access to all I/O signals via removable screw terminals. Each removable
screw terminal carries 8 I/O signals, signal names are clearly marked on the accessory board’s silk
screen. The screw terminal board plugs directly onto the I/O board while fitting inside the rugged
industrial enclosure.
NOTE: Screw termination board is also designed for the USB-isolated input/relay output board.
For USB-isolated input/FET output board, please use “FET OUTPUTS” silk screen for cor-
rect pin designations.
USB Connector
The USB connector is a Type B connector and mates with the cable provided. The USB port provides
communication signals along with +5 VDC power. The board can be powered from the USB port or, if
needed for higher current applications, an external power supply can be used.
LED
The LED on the front of the enclosure is used to indicate power and data transmissions. When the LED
is in an illuminated steady green state, this signifies that the board is successfully connected to the
computer and has been detected and configured by the operating system. When the LED flashes
continuously, this signifies that there is data being transmitted over the USB bus.
Figure 1-1:
Block Diagram