B&B Electronics 232MSS2 Bedienungsanleitung

Documentation Number 232MSS2-0108 Manual Cover Page

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 -Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

Mini Smart Switch CE

Model 232MSS2

Documentation Number 232MSS2-0108

pn3662-rev006

This product designed and manufactured

of domestic and imported parts by

International Headquarters

B&B Electronics Mfg. Co. Inc.

707 Dayton Road -- P.O. Box 1040 -- Ottawa, IL 61350 USA

Phone (815) 433-5100 -- General Fax (815) 433-5105

Home Page: www.bb-elec.com

Sales e-mail: [email protected] -- Fax (815) 433-5109

Technical Support e-mail: [email protected] -- Fax (815) 433-5104

European Headquarters

B&B Electronics Ltd.

Westlink Commercial Park, Oranmore, Co. Galway, Ireland

Phone +353 91-792444 -- Fax +353 91-792445

Home Page: www.bb-europe.com

Sales e-mail: [email protected]

Technical Support e-mail: [email protected]

1995 B&B Electronics --- Revised January 2008

B&B Electronics RESERVED. No part of this publication may be reproduced or transmitted in any form or

by any means, electronic or mechanical, including photography, recording, or any information storage and

retrieval system without written consent. Information in this manual is subject to change without notice, and

does not represent a commitment on the part of B&B Electronics.

B&B Electronics shall not be liable for incidental or consequential damages resulting from the furnishing,

performance, or use of this manual.

All brand names used in this manual are the registered trademarks of their respective owners. The use of

trademarks or other designations in this publication is for reference purposes only and does not constitute an

endorsement by the trademark holder.

Documentation Number 232MSS2-0108 Manual Table of Contents i

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 -Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

TABLE OF CONTENTS

Chapter 1: INTRODUCTION................................................1

Checklist................................................................................2

Chapter 2: SETUP................................................................ 3

Port Configuration .................................................................4

Serial Data Configuration......................................................5

Smart Switch Operation ........................................................5

Programming the Second Character ....................................7

Binary File Transfer...............................................................7

Smart Switch/Port Combiner Mode.......................................8

Specifications......................................................................11

Chapter 3: SOFTWARE..................................................... 13

Introduction..........................................................................13

Windows SSwitch................................................................13

DOS SSTSR........................................................................14

Parameters..........................................................................16

Default Values.....................................................................17

Help Screen.........................................................................17

Un-Install .............................................................................17

Selecting Ports....................................................................17

Hot Key Method...................................................................18

Command Line Method.......................................................19

APPENDIX A: ASCII Character Codes .......................... A-1

APPENDIX B: Cable Charts............................................ B-1

Chart 1. IBM PC DB25 Connector to Master Port..............B-2

Chart 2. IBM PC DB9 Connector to Master Port................B-2

Chart 3. Modem DB25 Connector to Master Port..............B-3

Chart 4. IBM PC DB25 Connector to Ports A - D (DTE)....B-3

Chart 5. IBM PC DB25 Connector to Ports A - D (DCE)....B-4

Chart 6. IBM PC DB9 Connector to Ports A - D (DTE)......B-4

Chart 7. IBM PC DB9 Connector to Ports A - D (DCE)......B-5

Chart 8. IBM PC DB25 Connector to Ports A - D (DCE)....B-5

Chart 9. IBM PC DB9 Connector to Ports A - D (DCE)......B-6

APPENDIX C: Declaration of Conformity...................... C-1

ii Table of Contents Documentation Number 232MSS2-0108 Manual

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 -Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

Documentation Number 232MSS2-0108 Manual 1

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 -Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

Chapter 1: INTRODUCTION

The RS-232 Four Port Mini Smart Switch/Port Combiner, Model

232MSS2, allows one RS-232 host device to connect to as many as

four RS-232 devices. The switch can be controlled in two different

ways. The first way is referred to as smart switch mode. In this

mode, the switch is controlled by sending a programmable preamble

code to the "Master" port of the 232MSS2. The other way the switch

can be controlled is referred to as port combiner mode. In port

combiner mode, a slave port can gain access to the master port by

asserting a handshake line. If none of the slave ports have their

handshake line asserted, the switch can be controlled using the

preamble code.

The master port can be configured as a DTE or DCE port by an

internal switch setting. If the master port is configured as a DTE port,

the four slave ports will become DCE ports. The 232MSS2 supports

the following signals: TD, RD, RTS, and CTS.

The 232MSS2 has an enhanced mode which offers special

timer features. The timer features can be used to prevent slave

devices from receiving preamble commands, inadvertently switching

from binary/graphic file transfers, and inactive slave devices from

holding control of the master port.

The 232MSS2 will work with baud rates from 1200 to 115,200

bps; 7 or 8 data bits; even, odd or no parity; and 1 or 2 stop bits

(7,N,1 is not allowed).

NOTE: The data format and rates mentioned are used to switch

the 232MSS2. The communication between the devices can use

any format or data rate.

There are four LED's on the 232MSS2 to indicate which port is

connected to the master port. The master port has a DB-25S female

connector and the slave ports have DB-9S female connectors. The

232MSS2 requires 12Vdc at 10ma. which is provided through a

2.5mm power jack.

Documentation Number 232MSS2-0108 Manual

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 -Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

Checklist

Examine the shipping carton and contents for physical damage.

If damage is found, file a claim with the shipper immediately.

The following equipment should be in the shipping carton:

1. RS-232 Mini Smart Switch

2. Instruction manual

3. Software media

If any of the items above are not in the shipping carton contact

the shipper immediately.

Documentation Number 232MSS2-0108 Manual 3

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 -Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

Chapter 2: SETUP

The 232MSS2 is set up using an eight-position dipswitch. This

dipswitch is used to set the communication format, port config-

uration, smart switch/port combiner mode and to enable/disable the

enhanced features. To change the settings on the switch, remove

the power from the unit, and remove the screws (4) from the bottom

of the 232MSS2. The dipswitch is located on the top of the PC board

(side with LEDs) and is labeled “SW1.” The other dipswitch, labeled

“SW2” is used to set the second character of the preamble. After the

switches have been set to match your requirements, you can put the

unit back together. NOTE: The end panel should be open end

towards the bottom of the PC board and the smooth side goes

toward the inside. Table 1 shows the settings for dipswitch “SW1”.

* = FACTORY DEFAULT

Table 1. Communication & Port Setup

Dipswitch SW1

1 2 3 4 5 6 7 8

Setting

0 0 0 X X X X X 1200 Baud

1 0 0 X X X X X 2400 Baud

0 1 0 X X X X X 4800 Baud

1 1 0 X X X X X 9600 Baud *

0 0 1 X X X X X 19.2K Baud

1 0 1 X X X X X 38.4K Baud

0 1 1 X X X X X 57.6K Baud

1 1 1 X X X X X 115.2K Baud

X X X 0 X X X X Enhanced Disabled *

X X X 1 X X X X Enhanced Enable

X X X X 0 X X X 8 Data Bits *

X X X X 1 X X X 7 Data Bits

X X X X X 0 X X Parity Disabled *

X X X X X 1 X X Parity Enabled

X X X X X X 0 X Smart Switch Mode*

X X X X X X 1 X Port Combiner Mode

X X X X X X X 0 DCE master port *

X X X X X X X 1 DTE master port

0 = OFF 1 = ON X = DON'T CARE

Documentation Number 232MSS2-0108 Manual

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 -Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

Port Configuration

In order to determine the proper port configuration of the

232MSS2, it is necessary to have a basic understanding of the

terms DCE and DTE. RS-232 was designed, using DB-25

connectors, for connecting a DTE (Data Terminal Equipment) device

to a DCE (Data Communication Equipment) device. Each device will

have inputs on pins that correspond to outputs on the same pins of

the other device. For example, a DTE device will transmit data out

on pin 2 (on a DB-25) and a DCE device will receive data in on pin 2

(on a DB-25). IBM PCs and serial printers are DTE devices,

modems are DCE devices.

If an IBM PC (DTE device) is going to be connected to the

232MSS2 master port, the master port should be configured as a

DCE port. If a modem (DCE device) is going to be connected to the

master port, it should be configured as a DTE port.

The master port can be configured as a DCE port (data received on

pin 2) or a DTE port (data received on pin 3) by setting dipswitch

“SW1”, position 8. To configure the master port as a DCE port, move

dipswitch “SW1”, position 8, to the "OFF" position. When the master

port is configured as a DCE port, ports A, B, C, & D will become

DTE ports (Refer to Table 2). To configure the master port as a DTE

port move dipswitch “SW1”, position 8, to the "ON" position. When

the master port is configured as a DTE port, ports A, B, C, & D will

become DCE ports (Refer to Table 3). Always power down the

smart switch when changing switch settings.

Table 2. DCE MASTER PORT CHART

Master Port

(DCE)

Signal A,B,C & D Ports

(DTE)

Pin# Direction Description Pin# Direction

2 Input Transmit Data (TD) 3 Output

3 Output Receive Data (RD) 2 Input

4 Input Request to Send (RTS) 7 Output

5 Output Clear to Send (CTS) 8 Input

7 <-------> Signal Ground (SG) 5 <----->

Documentation Number 232MSS2-0108 Manual 5

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 -Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

The 232MSS2 supports the following RS-232 signals: TD, RD,

SG, RTS & CTS.

NOTE: Handshake lines DSR and DTR are tied together on

each connector and are not passed through to the master port. All

other lines are not connected.

The Mini Smart Switch selects port A as the default port at power

up.

Serial Data Configuration

In order for the host device that is connected to the master port

to select any of the four ports, the Mini Smart Switch must be set to

match the host's communication format. Dipswitch “SW1” is used to

select the communication format of the Mini Smart Switch. Switch

positions 1 through 3 select the baud rate. Switch position 5 selects

7 or 8 data bits. Switch position 6 determines if parity is enabled or

disabled.

NOTE: A data format of 7 data bits, no parity and one stop is

not allowed.

Switch position 8 selects the port configuration, see section titled

"Port Configuration". Refer to Table 1. Always power down the smart

switch when changing switch settings.

Smart Switch Operation

Smart Switch mode is selected when dipswitch “SW1” position 7

is “Off.” In Smart Switch mode, the 232MSS2 is constantly looking

for the three character preamble code by monitoring the data that is

being received on the master port from the host device. The

232MSS2 requires a three character preamble code to turn on and

off a port. The first character must be the ASCII escape character

(decimal 27). The second character is user programmable by setting

dipswitch “SW2”. “SW2” comes from the factory programmed to the

Table 3. DTE MASTER PORT CHART

Master Port

(DTE)

Signal A,B,C & D Ports

(DCE)

Pin# Direction Description Pin# Direction

2 Output Transmit Data (TD) 3 Input

3 Input Receive Data (RD) 2 Output

4 Output Request to Send (RTS) 7 Input

5 Input Clear to Send (CTS) 8 Output

7 <-------> Signal Ground (SG) 5 <----->

Documentation Number 232MSS2-0108 Manual

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 -Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

ASCII character STX (decimal 2). The third character should be the

ASCII upper case letters "A", "B", "C" or "D" (decimal 65, 66, 67, or

68 respectively) to select those ports. To turn off the selected port

the third character should be the ASCII EOT character (decimal 4).

For instance, to turn on port B you would send:

ESC STX B

If you were writing a program in BASIC to control the Mini Smart

Switch you would form a string like this:

SWB$ = CHR$(27) + CHR$(2) + "B"

You could then send SWB$ to select port B. Similar strings

could be used for turning on the other ports. To turn off the ports the

string might look like this:

TOFF$ = CHR$(27) + CHR$(2) + CHR$(4)

When you are done with a port you can either select a new one

directly or turn off the selected port and then turn on the next one.

We recommend that you turn off the selected port before selecting

the next one. The turn off command consists of three characters that

are nonprinting (ESC STX EOT). If port A is selected and you send

the command to select port B, all three characters (ESC STX B) will

pass through the A port since it is still selected and the letter B will

show up on your port A device. For information on preventing

command codes from being received by slave devices, refer to the

Enhance Mode section.

NOTE: There is no delay through the Mini Smart Switch and

the data is not buffered.

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