CAS NT-580A, Manual, Page: 67 / 87

68
8. Serial Communication (RS-232C)
8-1. RS232C Connection
① How to Connect PC
Connect the serial port on the rear panel of the indicator to the serial port of PC as follows.
COM1 - TXD: 2, RXD: 3, GND: 7
RXD 3 O ------------------------------------
O 2 Transmit Data
TXD 2 O ------------------------------------ O 3 Receive Data
GND 7 O ------------------------------------ O 5 Signal Ground
┌─
O 8 Carrier Detect
├─
O 20 Data Terminal Ready
└─
O 6 Data Set Ready
┌─
O 4 Request to Send
└─
O 5 Clear to Send
9 pin port(Male) 25 pin port(Female)
RS-232C port of NT-580A Serial port of computer
COM2 - TXD: 2, RXD: 3, GND: 7
RXD 3 O ------------------------------------ O 2 Transmit Data
TXD 2 O ------------------------------------ O 3 Receive Data
GND 7 O ------------------------------------ O 5 Signal Ground
┌─ O 1 Carrier Detect
├─ O 4 Data Terminal Ready
└─ O 6 Data Set Ready
┌─ O 7 Request to Send
└─ O 8 Clear to Send
9 pin port(Male) 9 pin port(Female)
RS-232C port of NT-580A Serial port of computer