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8 Port Smart Switch
CE
Model 232D4SS8
Documentation Number 232D4SS84502
This product designed and manufactured in Ottawa, Illinois USA
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: orders@bb-elec.com -- Fax (815) 433-5109
Technical Support e-mail:
support@bb.elec.com
-- 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:
orders@bb-europe.com
Technical Support e-mail:
support@bb-europe.com
1999 B&B Electronics -- Revised November 2002
Documentation Number 232D4SS84502 Manual
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Summary of Contents for B&B Electronics 8 PORT SMART SWITCH CE 232D4SS8
- Page 1 8 Port Smart Switch Model 232D4SS8 Documentation Number 232D4SS84502 This product designed and manufactured in Ottawa, Illinois USA 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: orders@bb-elec.com -- Fax (815) 433-5109...
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Page 2: Table Of Contents
TABLE OF CONTENTS Chapter 1: HARDWARE ...1 Introduction...1 Specifications ...2 Checklist ...3 Serial Data Configuration ...3 Port Configuration...4 Master Port...4 RS-232 Configuration...9 RS-422/485 Slave Port Option...10 RS-422/ RS-485 Mode...11 Smart Switch Operation...13 Smart Switch Mode ...13 Three Character Command String ...13 Four Character Command String ...14 Programming the User Defined Character...15 Smart Switch/Port Combiner Mode ...16... -
Page 3: Chapter 1: Hardware
Chapter 1: HARDWARE Introduction The RS-232 Eight Port Smart Switch (232D4SS8) allows one RS-232 host device to connect to eight asynchronous serial devices. Refer to Figure 1. Four RS-232 ports and four RS-232 or RS-485 (two or four wire, send data contol) are standard on the 232D4SS8, depending on the pins you use. -
Page 4: Specifications
Specifications Model: 232D4SS8 Size: 25.65 W x 19.05 D x 8.38 H cm Power: 12VAC 830mA, 2.5mm power jack Connectors: Master - DB-25 female (RS-232 or RS-422) Slave - DB-25 male (RS-232 or RS-422/485) Switching Baud Rate: From 300 to 38.4 Kbps Connected Baud Rate: Any baud rate up to 115.2 Kbps electronics &... -
Page 5: Checklist
Master Port Microcontroller Port Combiner Control Lines Figure 1. Simplified Functional Diagram NOTE: This diagram illustrates only the transmit data (TD) signal. Checklist The following equipment should be in the shipping carton: 1. Smart Switch 2. Instruction Manual 3. (2) 3 1/2" disks If any of the items above are damaged or missing contact the shipper immediately. -
Page 6: Port Configuration
Table 1. Communication & Configuration Switch DIP Switch 1 0 = OFF Port Configuration The 232D4SS8 has a Master port and eight selectable ports labeled "A" through "H". Refer to “Rear View”. The Master port should be connected to the RS-232 device that will be selecting the ports. - Page 7 Figure 2. Printed Circuit Board Outline Documentation Number 232D4SS84502 Manual...
- Page 8 Figure 3. Master Port DCE/DTE Jumpers Figure 4. PC Board Options for RS-485 If an IBM PC (DTE device) is connected to the 232D4SS8 Master port, the Master port should be configured as a DCE port. If a modem (DCE device) is connected to the Master port, it should be configured as a DTE port.
- Page 9 Table 2. DCE MASTER PORT CHART Pin # Signal Description 14** TD (B) 15** TD (A) 16** RD (B) 17** RD (A) * Pins 6 & 8 are tied together inside the 232D4SS8 and share the same output. Refer to Figure 5. ** RS-422 Master port option.
- Page 10 Table 3. DTE MASTER PORT CHART Pin # Signal 14** TD (B) 15** TD (A) 16** RD (B) 17** RD (A) * Pins 6 & 8 are tied together inside the 232D4SS8 and share the same input. Refer to Figure 5. ** RS-422 master port option only.
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Page 11: Rs-232 Configuration
Table 4. DTE PORTS A - H Pin # Signal 14** TD(B) 15** TD(A) 16** RD(B) 17** RD(A) *Pins 6 & 8 are tied together inside the 232D4SS8 and share the same input. Refer to Figure 5. ** RS-422/485 option if installed. The 232D4SS8 has eight ports labeled "A - H". -
Page 12: Rs-422/485 Slave Port Option
Figure 5. Simplified RS-232 Schematic RS-422/485 Slave Port Option The RS-232 transmit and receive data signals on the Master port will be converted to balanced, full-duplex RS-422 or half-duplex RS-485 signals with this option. The 232D4SS8 comes standard with four RS-485 (2 or 4-wire) slave ports. Refer to Appendix B for cable charts. -
Page 13: Rs-422/Rs-485 Mode
Figure 6. Simplified RS-422/485 Schematic When a port has this option, additional circuitry will be mounted to the main board. The standard 232D4SS8 comes with the RS-485 option on four ports (Port A-D). Use Figure 2 to locate its position. Refer to Table 5 for pin-out, signal name, and signal direction information. - Page 14 There are two components located in the port B circuit area on the main printed circuit board, a resistor (R75) and a capacitor (C4), that are part of the send data control circuit. These components are factory selected for 9600 baud, which allows the send data control to operate at 9600 baud or higher.
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Page 15: Smart Switch Operation
Another option available on the 232D4SS8 is the slave ports set up as RS-422 ports. This means that the driver and receiver will be enabled all the time. RS-422 allows point-to-point operation or up to 10 receive only units up to 4000 feet on two pair of lines. Smart Switch Operation The 232D4SS8 has two modes in which it can select ports, smart switch, and smart switch/port combiner. -
Page 16: Four Character Command String
To turn any selected port off, the first and second character of the command control string must be the user-defined character. The third character must be the ASCII EOT character (decimal 4). Example 2: To turn off all ports, with ASCII STX (decimal 2) set as the user defined character. -
Page 17: Programming The User Defined Character
The turn off string also adds the ASCII ESC character to the front of the three-character turn off string. The first character is the ASCII ESC character. The second and third character of the command control string is the user-defined character. -
Page 18: Smart Switch/Port Combiner Mode
Table 4. SW2 Weight Chart DIP Switch 2 For example, if you wish to use the ASCII NAK character as the user defined character, which has a decimal value of 21, you would turn on switches 1, 3, and 5 (1 + 4 + 16 = 21). Caution should be used when selecting the user defined character, so that by itself, or with the ESC character in front of it (4-character command), or with the character following it, it is not a valid command to any of the... -
Page 19: Binary File Transfer
soon as the CTS line on port A was lowered. At that time any of the other RS-232 ports on the 232D4SS8 can raise their CTS line to establish connection. If port A is connected to the Master port and any of the other RS-232 ports on the 232D4SS8 raises their CTS line, the data sent to the 232D4SS8 from those ports would be lost. -
Page 20: Chapter 2: Software
Chapter 2: SOFTWARE 232D4SS8 Users Any references to the 232XSS in this section are also intended for the 232D4SS8 Smart Switch. Introduction The 232D4SS8 is shipped with 2 disks containing a Windows software program that will test the operation of the Smart Switch. When installed the program will allow the Smart Switch to select all available ports. -
Page 21: Smart Switch Setup
Method Two • Place the “Windows” disk #1 in drive A. (The instruction use drive A as default for the floppy drive. Replace A with your drive letter if necessary) • Select Programs from the Start Button and click on Windows Explorer. -
Page 22: Selecting Ports
Selecting Ports To change the com port the user need only go to the Settings Menu and select the Com Port tab. Then select the com port to which the device is attached. The Smart Switch program supports com ports 1 through 6. Uninstalling Windows Smart Switch Selector Program •... -
Page 23: Appendix A: Ascii Character Codes
APPENDIX A: ASCII Character Codes DECIMAL to HEX to ASCII CONVERSION TABLE DEC HEX ASCII KEY DEC HEX ASCII DEC HEX ASCII DEC HEX ASCII ctrl @ ctrl A ctrl B ctrl C ctrl D ctrl E ctrl F ctrl G ctrl H ctrl I ctrl J... -
Page 24: Appendix B: Cable Charts
APPENDIX B: Cable Charts These charts indicate some common cable wiring based on the DCE/DTE configuration of the Master Port. Refer to the Port Configuration section of this manual for information on Master Port configurations. Chart 1. IBM PC DB25 Connector to Master Port Master port configured as a DCE port. -
Page 25: Chart 3. Modem Db25 Connector To Master Port
Chart 3. Modem DB25 Connector to Master Port Master port configured as a DTE port. Async Modem Serial Port DB25 Connector * Pins 6 & 8 are tied together inside the 232D4SS8 and share the same input. NOTE: When using chart 3 above and connecting a DTE device to ports A - H of the smart switch, refer to Charts 7 and 8. -
Page 26: Chart 5. Ibm Pc Db25 Connector To Ports A - H (Dte
Chart 5. IBM PC DB25 Connector to Ports A - H (DTE) Master port configured as a DCE port. IBM PC Serial Port DB25 Connector * Pins are tied together inside the 232D4SS8 and share the same input. Chart 6. IBM PC DB9 Connector to Ports A - H (DTE) Master port configured as a DCE port. -
Page 27: Chart 7. Ibm Pc Db25 Connector To Ports A - H (Dte
Chart 7. IBM PC DB25 Connector to Ports A - H (DTE) Master port configured as a DTE port with a modem IBM PC Serial Port DB25 Connector * Pins 6 & 8 are tied together inside the 232D4SS8 and share the same input. -
Page 28: Chart 9. Rs-422/485 4-Wire Device To Port (A - H)
Chart 9. RS-422/485 4-Wire Device to Port (A - H) Configured RS-422/485 4-Wire Device TD (A)* TD (B)* Signal Ground RD (A)* RD (B)* * If the device being connected uses "+" and "-" in place of "B" and "A", the "+" replaces the "B" and the "-" replaces the "A". NOTE: Make sure the port's set-up jumpers are in the proper position for four-wire communications. -
Page 29: Appendix C: Declaration Of Conformity
APPENDIX C: Declaration of Conformity Manufacturer’s Name: Manufacturer’s Address: Model Number: Description: Type: Application of Council Directive: Standards: William H. Franklin III, Director of Engineering 232D4SS84502 Manual DECLARATION OF CONFORMITY B&B Electronics Manufacturing Company P.O. Box 1040 707 Dayton Road Ottawa, IL 61350 USA 232D4SS8 Eight-port Smart Switch...
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