B&B Electronics RS-232 Digital I/O Module 232SDD16 Manual de usuario descargar pdf (Pagina 5)

232SDD16-1005 Manual 5

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

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

Chapter 2 - Connections

This chapter will cover the connections required for the

232SDD16. There are three sets of connections: digital I/O, serial

port, and power supply. Do not make any connections to the

232SDD16 until you have read this chapter.

Digital I/O Connections

Connections to the I/O lines are made through the DB25S

(female) I/O port connector. Refer to Table 2.1. See Chapter 5 for

I/O interfacing examples.

Digital Inputs

The digital input lines are CMOS/TTL compatible and can handle

voltages from 0Vdc to +5Vdc.

Digital Outputs

The digital output lines have a maximum voltage of +5Vdc and

are CMOS/TTL compatible.

Ground

The pin should be connected to your external digital devices

ground.

6 232SDD16-1005 Manual

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

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

Serial Port Connections

In order to communicate to the 232SDD16 module it must be

connected to an RS-232 serial port. The unit automatically detects

baud rates from 1200 to 9600. A data format of 8 data bits, 1 stop

bit and no parity is used.

The 232SDD16 is configured as a DCE

device (See Table 2.2). If your communications equipment is

configured as a DTE device, such as a standard IBM PC serial port,

the 232SDD16 should be connected using a “straight through” DB-

25 cable or a standard DB-9 to DB-25 cable adapter as shown in

Table 2.3. If your communications equipment is configured as a

DCE device, such as a modem, the 232SDD16 should be connected

using a “null modem” cable (See Table 2.4).

Table 2.1 - 232SDD16 I/O Port Pinout

DB-25S

Pin #

Function

DB-25S

Pin #

Function

1 No connection 14 I/O #15

2 No connection 15 I/O #14

3 No connection 16 I/O #13

4 No connection 17 I/O #12

5 No connection 18 I/O #11

6 No connection 19 I/O #10

7 Ground 20 No connection

8 +12Vdc Input 21 I/O #9

9 I/O #0 22 I/O #8

10 I/O #1 23 I/O #7

11 I/O #2 24 I/O #6

12 I/O #3 25 I/O #5

13 I/O #4

1 2 3 4 5 6 7 8 9 10 ... 26 27

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