GDA-HLU1 is a USB-to-RS485 adapter(automatic data direction control) for all Gicren standard devices whose conversion mechanism is "USB <-> UART(FT232RL) <-> RS485(SP485EEN)" so it can also be used for other general purpose via pin header such as “USB<->UART” “USB<->RS485” and ”UART<->RS485”.

Taking into account security issues there are only D+ and D- pins connected to SP485EEN. In other words the front-end circuit and back-end circuit do not share the same ground in the printed circuit board but it is recommended to connect them manually to avoid excessive common-mode voltage when you are sure the connection is correct.

In addition the onboard high-quality D-Sub-9Pin-Female SMT-PH2.0-9Pin Header-2.54mm-Pitch-9Pin fuse and selectable matching resistor make this adapter more flexible and reliable.

It could cooperate with Gicren Drivers (DRI0032/DRI0033/DRI0037/DRI0038) directly.