Gossen THERMAL GRAPHICS PRINTERS IPP 144 - 40 G - Manual (Page 15)

Pin Signal
1 GND Ground (shield)
2 RXD (+) Receive data
3 n.c.
4 TXD Transmit data
5 RXD (-) Signal ground
6 n.c.
7 DTR (Data Terminal Ready)
+8 V: ready to receive
-7 V: not ready to receive
8 RTS (Request To Send)
+8 V: ready to receive
-7 V: not ready to receive
9 n.c.
13
Serial
Interface II
(only
IPP 144 -40 GE)
This interface can either be operated under hardware
handshake (DTR, RTS) or software handshake
(XON / XOFF - Protocol). This does not require special
settings.
See chapter 4.3.: Connecting diagram