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RS232 Serial Port Pin Assignment
Table 5 - J4 (RS232 Channel #1) or J9 (Channel #2)
Pin
Number
Name Description Type
1 CD Carrier Detect Input
2 DSR Data Set Ready Input
3 RX Receive Input
4 RTS Request To Send Output
5 TX Transmit Output
6 CTS Clear To Send Input
7 DTR Data Terminal Ready Output
8 RI Ring Indicator Input
9 Ground Ground Power
10 +5V
Supply voltage, Must be regulated if
power to board is being supplied from this
pin (Option must be specified when
ordering)
Input
RS485 Serial Port Pin Assignment
Table 6 - J7 RS485 Channel #1
Pin
Number
Name Description Type
1 RS485_RX+
Non-Inverting Receiver Input
(Full Duplex Mode)
Input
3 RS485_RX-
Inverting Receiver Input
(Full Duplex Mode)
Input
5 RS485_GND
RS485 Ground
(Not signal Ground!!!)
Power
RS485_TX+
Non-Inverting Driver Output
(Full Duplex mode)
Output
7
RS485_TX/RX+
Non-Inverting Receiver Input /
Driver Output (Half Duplex
mode)
Input/Output
RS485_TX-
Inverting Driver Output
(Full Duplex mode)
Output
9
RS485_TX/RX-
Inverting Receiver Input /
Driver Output (Half Duplex
mode)
Input/Output
MicroGate™ User Manual 9