Panasonic FP2 - Manual (Page 21)

Names and Functions of Parts FP2−CCU
2 − 5
2.1 Names and Functions of Parts
2.1.3 COM.1 and COM.2 Ports (9 Pins)
These are used to connect the RS232C connector of an RS232C device such as a
personal computer or display panel, using a shielded cable.
Pin layout
Pin No. Name Mnemonic Signal direction
1 Frame Ground FG —
2 Send Data SD Unit → External device
3 Receive Data RD Unit ← External device
4 Request to Send RS Unit → External device
5 Clear to Send CS Unit ← External device
6 (Not used) — —
7 Signal Ground SG —
8 Receive Carrier Detect CD Unit ← External device
9 Equipment Ready ER Unit → External device
(9−pin internal)