Brother HL-1240 - Manual (Page 49)

CHAPTER 2 OPTIONS
2-7
RS-100M Interface Connector
1 2
3 5 4
6 8 7
Fig. 2-4 Interface Connector
Pin Assignment
Pin No. Signal
IBM(RS-232C) Apple(RS-422A)
1 DTR DTR
2 DSR DSR
3 TxD TxD-
4 0V 0V
5 RxD RxD-
6 TxD+
7 N.C.
8 RxD+