Black Box RS-422 User Manual
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Black Box RS-422 User Manual

Black Box RS-422 User Manual

Code-operated switches
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Download this manual See also: Instruction Manual, User Manual
RS-422 Code-Operated Switches
CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com
T E X T
E N T
S P A R
T R A N
H IC S
G R A P
E
M O D
T
R E S E
JUNE 2000
SW421A-R2
SW422A-R2
C O S /
L O
S T
4

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Summary of Contents for Black Box RS-422

  • Page 1 Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 SUPPORT Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 INFORMATION Web site: www.blackbox.com • E-mail: info@blackbox.com...

  • Page 2: Trademarks Used In This Manual

    RS-422 CODE-OPERATED SWITCHES TRADEMARKS USED IN THIS MANUAL DEC and VT100 are trademarks of Digital Equipment Corporation. GW-Basic is a registered trademark of Microsoft Corporation. HP is a registered trademark of Hewlett-Packard. Wyse is a registered trademark of Wyse Technology.

  • Page 3: Specifications

    RS-422 CODE-OPERATED SWITCHES 1. Specifications Data Rates — 300, 1200, 2400, 4800, 9600, 19,200, 38,400, 76,800 bps Interface — RS-422/V.11, full duplex, asynchronous RS-422 Circuits Supported Pin # Description Pin # Description Control in low Data in high Control in high...
  • Page 4 NOTE: Models with RS-232 ports are available as part numbers SW853A and SW854A. The COS can also be specially ordered with some RS-422 and some RS-232 ports. These units are configured at the factory at the time the order is placed. When you receive a specially ordered COS, make sure the configuration matches your order.

  • Page 5: Board Layout

    RS-422 CODE-OPERATED SWITCHES 2.2 Board Layout These switches are for COS-8 RS-232 only W1 = COS/8* SW10 LOCK *W5 on the COS/4 is the same as W1 on the COS/8. Figure 2-2. Component Layout.

  • Page 6: Installation

    RS-422 CODE-OPERATED SWITCHES 3. Installation 3.1 General Installation of the COS is a matter of connecting the modem and terminal connectors to the proper communications equipment using the interface connectors. When viewing the COS from the rear, the leftmost connector is the Master connector. The channel connectors are numbered from left to right 0, 1, 2, 3 (4, 5, 6, and 7 also for COS/8).
  • Page 7 Note that positions 6, 7, and 8 on Switch B may be selected to assert RTS or CTS high or to tie RTS directly to CTS. Switch 5 may be used to assert CD high. RS-422 operates independently of port switch settings. DTE is used if connecting to a terminal.
  • Page 8 RS-422 CODE-OPERATED SWITCHES 3.2.2 S WITCH Switch Position Open = Even Parity Closed = Odd Parity Position 2 Position 3 Word Length Closed Closed 5 bits Open Closed 6 bits Closed Open 7 bits Open Open 8 bits Open = 2 stop bits...
  • Page 9 RS-422 CODE-OPERATED SWITCHES Arming Characters Arming Character Switch Positions ASCII CTRL Decimal SPACE " &...
  • Page 10 RS-422 CODE-OPERATED SWITCHES Arming Characters Arming Character Switch Positions ASCII CTRL Decimal < > ¨...
  • Page 11 RS-422 CODE-OPERATED SWITCHES Arming Characters Arming Character Switch Positions ASCII CTRL Decimal — 3.2.4 S WITCH See the graphics mode description (Section 4.6.3) for additional information. NOTE Close only one position at a time. Position Closed 1 = 5-word gap in transmission...
  • Page 12 Strap W7 selects whether the RS-422 Code Operated Switch (COS) will go into switch time or not, when carrier detect is lost on the master port. This will disconnect any port the RS-422 COS may be on if the session is terminated for any reason.

  • Page 13: Operation

    RS-422 CODE-OPERATED SWITCHES 4. Operation 4.1 Arming Character When the COS receives the arming character in the data stream, it will enter an armed state called “switch time.” When the COS is in this armed state, the ST LED on the front panel will be lit. You choose the arming character with DIP-switch setting SW8 (see Section 3.2.3).

  • Page 14: Modes Of Operation

    RS-422 CODE-OPERATED SWITCHES 4.6 Modes of Operation The COS can operate in one of three modes. The front-panel toggle switch labeled “MODE” is used to select Text, Transparent, or Graphics modes. 4.6.1 T WITCH OSITION In this mode, the COS will enter switch time whenever it receives an arming character. It will select the subordinate channel that is specified by the channel-select character.
  • Page 15 RS-422 CODE-OPERATED SWITCHES 4.8 Basic Test Program for the COS 10 REM************CODE-OPERATED SWITCH TEST******************* 20 OPEN "COM1:9600,N,8,1,CS,DS"AS1 :REM**SET UP COM 1 PC PORT** 30 P=48 :REM**SET PORT # TO 1 (DECIMAL 48)** 40 PRINT #1,CHR$(4); :REM**SEND ARMING CHAR** 50 PRINT #1,CHR$(P);...

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