CJB CJ ISA-E5, User Manual, Page: 31 / 90

ISA-E5 User`s Manual 23
COM3, COM4 Serial Ports
COM3, COM4 are 10-pin header connectors, are the onboard COM3,
COM4 serial ports of the ISA-E5. The following table shows its pin
assignments.
Pin # RS232 Mode
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 Ring-IN
10 N.C.
USB12, USB34 Connectors
The following table shows the pin outs of the USB12 USB34
connectors.
Signal Name Pin # Pin # Signal Name
N.C. 1 2 VCC
GND 3 4 USB-
USB+ 5 6 USB+
USB- 7 8 GND
VCC 9 10 N.C.