IBM L40 SX Quick Reference page 118

B.5 Pin Assignments
The following table shows the Serial Adapter external connector pin
assignments.
+------------------------------------------------------------------------+
¦ Pin ¦ ¦
¦ No. ¦ ¦
¦ ¦ Signal Name¦ Directio¦ Description
¦ ¦ ¦
+-----+------------+---------+-------------------------------------------¦
¦ 3 ¦ TX DATA ¦ Out
+-----+------------+---------+-------------------------------------------¦
¦ 2 ¦ RX DATA ¦ In
+-----+------------+---------+-------------------------------------------¦
¦ 7 ¦ RTS ¦ Out
+-----+------------+---------+-------------------------------------------¦
¦ 8 ¦ CTS ¦ In
+-----+------------+---------+-------------------------------------------¦
¦ 6 ¦ DSR ¦ In
+-----+------------+---------+-------------------------------------------¦
¦ 5 ¦ GND ¦
+-----+------------+---------+-------------------------------------------¦
¦ 1 ¦ DCD ¦ In
+-----+------------+---------+-------------------------------------------¦
¦ 4 ¦ DTR ¦ Out
+-----+------------+---------+-------------------------------------------¦
¦ 9 ¦ RI ¦ In
+------------------------------------------------------------------------+
PS/2 Model L40 SX Quick Reference
Pin Assignments
¦
¦
¦
¦ Transmit Data
¦ Receive Data
¦ Request to Send
¦ Clear to Send
¦ Data Set Ready
¦ Signal Ground
¦ Data Carrier Detect
¦ Data Terminal Ready
¦ Ring Indicator
¦ Copyright IBM Corp. 1991
B.5 - 1
¦
¦
¦
¦
¦
¦
¦
¦
¦
¦
¦
¦
¦