User's Manual

T90-DTU User Manual
4
3. Interface definition
3.1. Power interface
Users can choose ⑥ DC power interface,using the power adapter supply with the interface of the 5.5mm outer
diameter , 2.5mm diameter ;
Also users can choose the VCC and GND terminal power supply from ② , both are optional；
8 ~ 28V DC power supply, it is recommended to use 12V or 24V DC power supply for T90-DTU.
3.2. RS232
The T90-DTU can be connected to the device via RS-232 using the standard DB-9 interface.
3.3. RS485
T90-DTU can be connected to the 485_A terminal and 485_B terminal from ② with the RS-485 A terminal
and B terminal of other device respectively.
Pin NO.
Definition
Function
Description
1
VCC
Crimping power interface,
positive
8 ~ 28V DC, recommended 12V or 24V
2
GND
Crimping power interface,
negative
The power supply negative pole is connected to
the system ground and the housing
3
485_B
RS-485 interface, interface B
The RS-485 interface B is connected to the
device interface B
4
485_A
RS-485 interface, interface A
The RS-485 interface A is connected to the
device interface A