2.3.2 Connector COM1[RS485] , COM3[RS485] and COM3[RS232]
The 9 Pin, Female, SUB-D, COM1 [RS-485] , COM3 [RS-485] and COM3 [RS-232] Port on the back of the unit is
the RS-232 and RS485/422 communications port for connecting to a controller.
Pin assignment of the 9 Pin, Female, SUB-D COM1 [RS-485], COM3 [RS-485] and COM3 [RS-
232] Port
Pin#
Symbol
Com1
[RS485]2w
Com1
[RS485]4w
Com3 [RS485] Com3 [RS232]
1
Rx-
Data-
Rx-
2
Rx+
Data+
Rx+
3
Tx-
Tx-
4
Tx+
Tx+
5
GND
Signal Ground
Signal Ground
Signal Ground
Signal Ground
6
Data-
Data-
7
TxD
Transmit
8
RxD
Receive
9
Data+
Data+
2.3.3 USB Host port
Supports various devices with USB interface, such as mouse, keyboard, USB
stick, printer…etc.
2.3.4 Connecter Wire
MT8-Ethernet/RZC045120: Direct connect (Ethernet crossover cable)
MT8000 Ethernet RJ45
Wire color
PC or Note Book RJ45
1 TX+
White/Orange
-------------------------------------
3 RX+
2 TX-
Orange
-------------------------------------
6 RX-
3 RX+
White/Green
-------------------------------------
1 TX+
4 BD4+
Blue
-------------------------------------
4 BD4+
5 BD4-
White/Blue
-------------------------------------
5 BD4-
6 RX-
Green White/Brown
-------------------------------------
2 TX-
7 BD3+
Brown
-------------------------------------
7 BD3+
8 BD3-
-------------------------------------
8 BD3-
Pin
Designations
COM1 [RS-485]
COM3 [RS-485]
COM3 [RS-232]
