NCR RealPOS 7458 - Serial COM3 (CN6); Serial COM4 (CN5)

Chapter 3: Hardware Service 3-59
Serial COM3 (CN6)
Pin Signal Name
1 DCD
2 Serial In - (SIN)
3 Serial Out - (SOUT)
4 DTR-
5 GND
6 DSR-
7 RTS-
8 CTS-
9 +12V For powered RS232
Serial COM4 (CN5)
Pin Signal Name
1 DCD
2 Serial In - (SIN)
3 Serial Out - (SOUT)
4 DTR-
5 GND
6 DSR-
7 RTS-
8 CTS-
9 +12V for powered RS232