Chapter 4; Introduction; The Rs232 Standard - Brainboxes CC-313 Manual

Table of Contents

RS232 Pinouts and Port Cabling

PCI Quad / Lynx 8 Port RS232

Chapter 4

RS232 PINOUTS AND PORT

CABLING.

This chapter gives details of the 9 and 25 pin RS232 pin outs,

cabling and connections, with information on how to connect the

serial ports of two PCs, how to make a selftest loop back connector

and the pinouts of the PCI Quad and Lynx 8 Port RS232 card

The RS232 standard is ancient in computer industry terms.

Introduced in 1962, it is now widely established. RS232 is a slow

speed, short distance, single ended transmission system (i.e. only

one wire per signal). Typical RS232 maximum cable length is 50

feet with a maximum data rate of 20K bits per second.

Figure 4-1. RS232 Point To Point Connection.

T T L

G RO U N D

RS232C Standard

1 Driver 1 Receiver

Line Length

Max Data Rate

50 Feet = 15m

20 Kbits/sec

Chapter 4 Page 36

Table of Contents

Cc-310