B&B Electronics manual Table B-3, DB-25 Serial Port Connections P to S 232SPS2

Some printers may require one or more of the following connections:

6.Data Set Ready (DSR) from the printer must be connected to Pin #6 on the 232SPS2 module.

7.Clear To Send (CTS) from the printer should be connected to Pin #5 on the 232SPS2 module.

8.Data Carrier Detect (DCD) from the printer should be connected to Pin #8 on the 232SPS2 module.

NOTE: IBM PC’s (or compatible) serial ports and serial printers are both DTE devices. Therefore, a null modem cable ( like a serial printer cable!) must be used when connecting a PC’s serial port to a printer. A null modem cable or serial printer cable should not be used to connect to the 232SPS2 (unless your device is a DCE -- such as a modem).

TABLE B-3

DB-25 Serial Port Connections (P to S)

Serial Port			232SPS2
(DTE)			(DCE)
	Signal Name	Direction	DB-25P
DB-25S			Pin #
2	Transmit Data	----------->	2
3	Receive Data	<-----------	3
4	Request to Send		4
5	Clear to Send	<-----------	5**
6	Data Set Ready	<-----------	6**
7	Signal Ground		7
8	Carrier Detect	<-----------	8**
20	Data Terminal	----------->	20
	Ready
22	Ring Indicator		22

232SPS24595 Manual Appendix BB-5

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