weintek EasyView MT-600 Series Installation Instruction page 5

2.3.2 Connector COM2 [RS232]
Pin Designations
COM2 [RS-232]
2.3.3 Connector COM3[RS485]
Pin Designations
COM3 [RS-485]
2.3.4 USB Client port
The USB client port for ActiveSync，use a USB client to USB host cable connects the USB client port on
MT606 and the USB host port on user's host PC.
Pin
1
2
3
4
2.3.5 USB Master port
The USB Master port can connect USB mouse and USB keyboard.
Pin assignment of the 9 Pin, Male, SUB-D COM2 [RS-232] Port
Pin# Symbol
1
2 RxD
3 TxD
4
5 GND
6
7 RTS
8 CTS
9
Pin 1,6,8 short.
Pin assignment of the 9 Pin, Female, SUB-D COM3 [RS-485] Port
Pin# Symbol
1
2 Tx+
3 Tx-
4 Rx+
5 Rx-
6 GND
7
8
9
Function
N/C
USB_DATA-
USB_DATA+
GND
5
Function
Received Data
Transmitted Data
Signal Ground
Ready to send output
Clear to send input
RS-485 4wire
Transmitted Data+
Transmitted Data-
Received Data+
Received Data-
Signal Ground
RS-485 2wire
Data+
Data-
Signal Ground