6-11

6.2.5 Interface pin assignment

Serial and parallelinterface pin assignment tables are shown below.

Serial interface pin assignmenttable

Pin No. Signal Input/Output Description
1 F.GND −Frame ground
2 TXD Output RS-232Coutput data
3 RXD Input RS-232C input data
4RTS −RS-232C (pull up to +5V with 2 K Ω]
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 −+5V (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-232Cdata transmi ssion (busy) on
printer permitted
21 NC −No connection
22 NC −No connection
23 NC −No connection
24 NC −No connection
25 NC −No connection