Black Box RS0232 manual

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Table of contents for the manual

  • Page 1

    Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500 ) FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mailing address: Black Box Corporation , 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com CUSTOMER SUPPORT INFORMATION FEBRU AR [...]

  • Page 2

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 1 FEDERAL COMMUNICA TIONS COMMISSION AND INDUSTR Y CANADA RADIO FREQUENCY INTERFERENCE ST A TEMENTS This equipment generates, uses, and can radiate radio-frequency energy , and if not installed and used properly , that is, in strict accordance with the manufacturer’ s instructions, may cause inter ference t[...]

  • Page 3

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 2 INSTRUCCIONES DE SEGURIDAD (Normas Oficiales Mexicanas Electrical Safety Statement) 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas[...]

  • Page 4

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 3 TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the pr operty of the trademark owners.[...]

  • Page 5

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 4 Contents Chapter Page 1.Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 6

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 5 1. Specifications Speed — 64,000 bps, max. Connectors — RS-232 port: DB25 female; RS-422 port: DB37 female Indicators — 7 LEDs show status of RS-232 and RS-422 signals and indicate power ON. RS-232 Port: DSR, CTS, DA T A; RS-422 Port: DSR, CTS, DA T A Controls — RS-232 port: DTE/DCE DIP shunts; RS-4[...]

  • Page 7

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 6 2. Introduction The RS-232 ↔ RS-422 Inter face Converter provides bi-directional synchronous or asynchronous conversion of all commonly used RS-232 and RS-422 signals. The unit is designed to operate with one port configured as Data T erminal Equipment (DTE) and the other port as Data Communications Equip[...]

  • Page 8

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 7 1. The Converter does not require special handshaking signals in order to operate. 2. The Converter should always be configured the opposite of the equipment it’ s connected to if straight-through cabling is used. For example, if you are connecting a modem (a DCE device) to the Converter , configure the C[...]

  • Page 9

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 8 3. Installation T o connect the Converter to your devices, follow these steps: 1. Attach the cable from the RS-422 device to the 37-pin female receptacle on the rear panel of the Converter . 2. Attach the cable from the RS-232 device to the 25-pin female receptacle on the rear panel of the Converter . 3. Pl[...]

  • Page 10

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 9 Figure 3-1. Board Layout Showing Component Locations. (Dashed Lines show DTE/DCE DIP Shunt Locations.) AC POWER CONNECTOR RS-422 CONNECTOR RS-232 CONNECTOR DIP SHUNTS DIP SHUNTS DSR CTS DA T A RS-422 INDICA TORS POWER DSR CTS DA T A RS-232 INDICA TORS XW1A XW2A XW3A XW4A XW4B XW5A XW5B XW1B XW2B XW3B CR8 CR[...]

  • Page 11

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 10 Figure 3-2. Sample DIP-Shunt Setting. Figure 3-2 shows the DIP-shunt settings used for an application like the one illustrated in Figure 3-3a. NOTE The filled-in rectangles in Figure 3-2 indicate the jumpers that contain a DIP-shunt. CAUTION Never set both ports the same: the cloc ks will not operate corre[...]

  • Page 12

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 11 Figures 3-3a and 3-3b show some typical synchronous applications. Figure 3-3. Synchr onous Applications. Applications involving asynchronous devices are also possible. Figure 3-4 illustrates a popular asynchronous setup, while Figure 3-5 shows the cabling involved. Figure 3-4. RS-422 Asynchr onous Applicat[...]

  • Page 13

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 12 T HE R ECEIVER T ERMINA TION S WITCH This switch is marked S1 on the printed circuit-board diagram in Figures 3-1 and 3-2. This switch ser ves to terminate the receiver with pull-up and pull-down resistors in order to designate the receiver state and enable the Converter’ s anti-streaming function. Setti[...]

  • Page 14

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 13 Figure 3-5. Signal Flow Diagram A. RS-232 (Port is DTE) RS-422 (Port is DCE) 12 Terminal Ready A (-) 30 Terminal Ready B (+) DTR 20 CR8 (RS-422 DSR LED) 11 29 Data Mode A (-) Data Mode B (+) DSR 6 CR9 (RS-232 DSR LED) CTS 5 9 27 Clear to Send A (-) Clear to Send B (+) CR4 (RS-232 CTS LED) RTS 4 7 25 Reques[...]

  • Page 15

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 14 Figure 3-6. Signal Flow Diagram B. RS-232 (Port is DCE) RS-422 (Port is DTE) 12 Terminal Ready A (-) 30 Terminal Ready B (+) DTR 20 CR8 (RS-422 DSR LED) 11 29 Data Mode A (-) Data Mode B (+) DSR 6 CR9 (RS-232 DSR LED) CTS 5 9 27 Clear to Send A (-) Clear to Send B (+) CR4 (RS-232 CTS LED) RTS 4 7 25 Reques[...]

  • Page 16

    RS-232 ↔ RS-422 INTERF ACE CONVER TER 15 4. Ground Strap and Inter face Pinouts Signal grounds (Pins 19, 20, and 37 on the RS-422 inter face and Pin 7 on the RS-232 inter face) are connected together , but not connected to chassis ground (Pin 1). However , for applications requiring all grounds to be at a common reference point, these pins can be[...]

  • Page 17

    1000 P ark Drive • Lawrence, P A 15055-1018 • 724-746-5500 • F ax 724-746-0746 © Copyright 1998. Black Box Corporation. All rights reserv ed.[...]