EMB-M2 User`s Manual
23
COM1, COM2 Serial Ports
COM1 and COM2, a 9-pin D-Sub male connector, is the onboard
COM1 and COM2 serial port. The following table shows its pin
assignments.
Pin #
Signal Name
1
DCD, Data carrier detect
2
RXD, Receive data
3
TXD, Transmit data
4
DTR, Data terminal ready
5 GND,
ground
6
DSR, Data set ready
7
RTS, Request to send
8
CTS, Clear to send
9 +5V,Ring-IN
or
+12V
COM4 Serial Ports
COM4, a 9-pin D-Sub male connector, is the onboard COM4 serial
port of the M2. The following table shows its pin assignments.
Pin #
RS232 Mode
Signal Name
RS422/RS485 Mode
Signal Name
1 DCD,
Data
carrier detect
TX- (422/485)
2
RXD, Receive data
TX+ (422/485)
3
TXD, Transmit data
RX+ (422)
4
DTR, Data terminal ready
RX- (422)
5 GND,
ground
GND
6
DSR, Data set ready
N.C.
7
RTS, Request to send
N.C.
8
CTS, Clear to send
N.C.
9 +5V
or
+12V
N.C.
10
N.C
N.C
Summary of Contents for EMB-M2
Page 1: ...E EM MB B M M2 2 INDUSTRIAL MOTHERBOARD User s Manual Version 1 1...
Page 9: ...2 EMB M2 User s Manual Chapter 1 Features Specifications Features 3 Specifications 4...
Page 15: ...8 EMB M2 User s Manual This page is intentionally left blank...
Page 18: ...EMB M2 User s Manual 11 Jumper Locations on the M2...
Page 23: ...16 EMB M2 User s Manual Connector Locations on the M2 1 2...
