Thank you for your attention. Have a nice day!
Transportation is very convenient, located at Guangzhou International Airport, customs clearance is fast and delivery is fast. 

Opto-coupler isolated input (supporting current sink
output and current source output) and opto-coupler
isolated open-collector output (current sink type)
This product has the opto-coupler isolated input 8ch
(supporting current sink output and current source output)
whose response speed is 1msec and opto-coupler isolated
open-collector output 8ch (current sink type).
Common terminal provided per 8ch, capable of supporting a
different external power supply
Supporting driver voltages of 12 - 24 VDC for I/O
Conforming to the USB1.1 and USB2.0 Standards and
supporting the internal and external power supplies
Compatible to USB1.1/USB2.0 and capable to achieve high
speed transfer at HighSpeed (480 Mbps).
Not necessary to power this product externally as the bus
power of USB is used. Capable of accepting an external
power supply (optional AC adapter) when lower power
consumption is required, e.g., for use with a notebook PC

Opto-coupler bus isolation
As the USB (PC) is isolated from the input and output
interfaces by opto-couplers, this product has excellent noise
performance.
Trigger monitor function integrated
The CPU inside the module can report status changes (rise
and fall) to the host in a minimum cycle of 1msec.
Easy to increase the number of I/O channels using an
expansion module
Adding optional modules (up to 3 units) can easily increase the
number of I/O channels. The unique structure for connection
by stacking enables easy and compact system configuration.
Screw-less connector plug facilitating wiring and
plugging/unplugging
Wiring and plugging/unplugging are easy as the screw-less
connector plug is used.
Capable of being mounted on 35-mm DIN rails