Advantech USB-4750 - Manual (Page 19)

13 Chapter 3
3.2.2 I/O Connector Signal Description
3.2.3 LED Indicator Status Description
The USB Module is equipped with a LED indicator to show the current
status of the device. When you plug the USB device into the USB port,
the LED indicator will blink five times and then stay lit to indicate that it
is on. Please refer to the following table for detailed LED indicator status
information.
Table 3.1: I/O Connector Signal Descriptions
Signal Reference Direction Description
IDI<0~15> GND Input Isolated digital input channels
INT<0,1> INT_G Input Interrupt trigger sources.
INT<0,1>_
G - - Ground for interrupt pins.
CNT<0,1> GND Input Isolated input counters
IDO<0~15> GND Output Isolated digital output channels
COM<0,1> - - Common pins for connecting induc-
tive loads of isolated output channels
GND - - Ground
Table 3.2: LED Indicator Status Description
LED Status Description
On Device ready for work
Off Device not ready to work
Slow Blinking (5 times) Device initialization
Fast Blinking
(Depends on data transfer speed). Device working