Maple Systems PC110CF - Manual (Page 17)

14 PC100 Series Operation Manual
1010-1022 Rev. 01
Serial Ports
The PC110C has two DE9 connectors for serial devices. COM1 is fixed for RS-232. COM2 is selectable for
RS232/422/485. The pinouts for each port are below.
COM1 [RS232
]
Pinout
Pin # Symbol Function
1 DCD Data Carrier Detect
2 RxD Received Data
3 TxD Transmitted Data
4 DTR Data Terminal Ready
5 GND Signal Ground
6 DSR Data Set Ready
7 RTS Ready to send output
8 CTS Clear to send
9 Not Used
Restrict cable length to less than 500 feet (150m) for RS422/RS485 devices and less than 50 feet (15m)
for RS232 devices in order to avoid communication problems.