Serial Ports; Com1 - Maple Systems PC100 Series Operation Manual

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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.
Restrict cable length to less than 500 feet (150m) for RS422/RS485 devices and less than 50 feet (15m)
COM1 [RS232
]
Pinout
Pin # Symbol
1 DCD
2 RxD
3 TxD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 Not Used
1010-1022 Rev. 01
for RS232 devices in order to avoid communication problems.
Function
Data Carrier Detect
Received Data
Transmitted Data
Data Terminal Ready
Signal Ground
Data Set Ready
Ready to send output
Clear to send
PC100 Series Operation Manual