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6.2.5 Interface pin assignment
Serial and parallel interface pin assignment tables are shownbelow.
Serial interface pin assignment table
Pin No. Signal Input/Output Description
1 F.GND − Frame ground
2 TXD Output RS-232C output data
3 RXD Input RS-232C input data
4RTS − RS-232C (pull up to +5V with 2 KΩ]
5 CTS Input RS-232C data transmission on
computer permitted
6NC − No connection
7 S.GND − Signal ground
8NC − No connection
9NC − No connection
10 NC − No connection
11 NC − No connection
12 NC − No connection
13 S.GND − Signal ground
14 +5VDC − +5 V (max. load 100 mA)
15 NC − No connection
16 NC − No connection
17 NC − No connection
18 NC − No connection
19 NC − No connection
20 DTR Output RS-232C data transmission (busy) on
printer permitted
21 NC − No connection
22 NC − No connection
23 NC − No connection
24 NC − No connection
25 NC − No connection