B&B Electronics manual 232SPS2-3903 ManualAppendix B Serial Port Connections B-3

TABLE B-1

DB-25 Serial Port Connections (S to P)

Serial Port			232SPS2
(DTE)	Signal Name	Direction	(DCE)
DB-25S Pin #			DB-25P 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 Ready	----------->	20
22	Ring Indicator		NC

*When using XON/XOFF control, this connection may not be required.

TABLE B-2

DB-9 Serial Port Connections (S to P)

Serial Port			232SPS2
(DTE)			(DCE)
DB-9S Pin#	Signal Name	Direction	DB-25P Pin#
1	Data Carrier Detect	<-----------	8**
2	Receive Data	<-----------	3
3	Transmit Data	----------->	2
4	Data Terminal	----------->	20
	Ready
5	Signal Ground		7
6	Data Set Ready	<-----------	6**
7	Request to Send		4
8	Clear to Send	<-----------	5**

**Some systems may require this connection.

*When using XON/XOFF control, this connection may not be required.

**Some systems may require this connection.

232SPS2-3903 ManualAppendix B: Serial Port Connections B-3

B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5104

PARALLEL TO SERIAL MODE, HARDWARE HANDSHAKING

The serial port of the 232SPS2 module is wired as a DCE device. For proper operation the following connections must be present:

1.Transmit Data (TD) from the printer (DTE) must be connected to Pin #2 on the 232SPS2 module.

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

3.Signal Ground (SG) from the printer must be

connected to Pin #7 on the 232SPS2 module. If port powering the 232SPS2, these connections are recommended:

4.Request to Send (RTS) from the host must be connected to Pin #4 on the 232SPS2 module.

5.Data Terminal Ready (DTR) from the host must be

connected to Pin #20 on the 232SPS2 module. Some printers may require one or more of the following connections:

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

7.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).

PARALLEL TO SERIAL MODE, SOFTWARE HANDSHAKING For proper operation the following connections must be present:

1.Transmit Data (TD) from the printer (DTE) must be connected to Pin #2 on the 232SPS2 module.

2.Receive (RD) from the printer must be connected to Pin #3 on the 232SPS2 module.

3.Signal Ground (SG) from the printer must be connected to Pin #7 on the 232SPS2 module.

If port powering the 232SPS2, these connections are recommended:

4.Request to Send (RTS) from the host must be connected to Pin #4 on the 232SPS2 module.

5.Data Terminal Ready (DTR) from the host must be connected to Pin #20 on the 232SPS2 module.

B-4 Appendix B: Serial Port Connections232SPS2-3903 Manual

B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5104