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6-9
6.2.5 Interface pin assignment
Serial and parallel interface pin assignment tables are shown below.
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
4 RTS − RS-232C (pull up to +5V with 2 KΩ)
5 CTS Input RS-232C data transmission on computer
enabled
6 NC − Not connected
7 S.GND − Signal ground
8 NC − Not connected
9 NC − Not connected
10 NC − Not connected
11 NC − Not connected
12 NC − Not connected
13 S.GND − Signal ground
14 +5VDC − +5 V (max. load 100 mA)
15 NC − Not connected
16 NC − Not connected
17 NC − Not connected
18 NC − Not connected
19 NC − Not connected
20 DTR Output RS-232C data transmission on printer
enabled (Busy)
21 NC − Not connected
22 NC − Not connected
23 NC − Not connected
24 NC − Not connected
25 NC − Not connected