The ImageWriter LQ has an RS-422/RS-232 serial port with a minicircular-8
socket. The signals on each of the pins are as follows:
Pin Symbol Description Direction
1 DTR Data Terminal Ready Output
2 DSR Data Set Ready Input
3 TxD- Transmitted Data Output
4 SG Signal Ground
5 RxD- Received Data Input
6 TxD+ Balanced Transmit Output
7 NC No Connection
8 RxD+ Balanced Receive Input
Shield PG Protective Ground
To connect an RS-232 interface to an ImageWriter LQ, use the following pin
assignments:
Minicircular-8 RS232
Pin Number Symbol Description DB25 pin number
1 DSR Data Set Ready 6**
1 DCD Data Carrier Detect 8**
2 DTR Data Terminal Ready 20
3 RxD Received Data 3
4* GND Ground 7
5 TxD Transmitted Data 2
6 NC No Connection
7 NC No Connection
8* GND Ground
Shield Shield
* Connect together at minicircular connector
** Connect together at DB25 connector