Citizen CLP-2001 user manual Interface pin assignment

6.2.5Interface 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

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