Horner APG QX351 OCS HEQX351C103 - Manual (Page 26)

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
1
8
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
1
8
* +5Vdc 60mA Max