B&B Electronics 232SPS2 - Manual User Manual

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B-4

Appendix B: Serial Port Connections

232SPS2-0812 Manual

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: