
CH.5 MAN0892-03-EN
February 25, 2010 Page 26 of 109 # 1039
Figure 5.2: MJ Serial Port Connectors and DIP Switches for RS-485 Port Termination
Table 5.2 – – MJ2 Serial Port Pin Assignments
Pin Signal Signal Description Direction
1 RX+ RS-485 Receive Positive In
2
RX−
RS-485 Receive Negative
In
3 TX+ RS-485 Transmit Positive Out
4
TX−
RS-485 Transmit Negative Out
5 +5* +5 VDC 60mA max Out
6 0V Ground
−
7 TD
1
RS-232 Transmit Data In
8 RD
1
RS-232 Receive Data Out
Switch
On
Position
MJ2 Pinouts in Full and Half Duplex Modes
* +5Vdc 60mA Max
Pin
MJ2 Pins
Signal Direction
8
TXD OUT
7
RXD IN
6
0 V Ground
5*
+5 60mA OUT
4
TX- OUT
3
TX+ OUT
2
RX- IN
1
RX+ IN
MJ2 Full Duplex Mode
MJ2 Half Duplex Mode
Pin
MJ2 Pins
Signal Direction
8
TXD OUT
7
RXD IN
6
0 V Ground
5*
+5 60mA OUT
4
TX- OUT
3
TX+ OUT
2
TX-/RX- IN/OUT
1
TX+/RX+ IN/OUT
* +5Vdc 60mA Max
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