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Black Box PSD-4 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 SEPTEMBER[...]

  • Page 2

    FCC ST A TEMENT 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 to radio communication. I[...]

  • Page 3

    PSD-4 AND PSD-8 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 las advertencias en el [...]

  • Page 4

    TRADEMARKS 3 TRADEMARKS USED IN THIS MANUAL AS/400 is a registered trademark of International Business Machines Corporation. Any other trademarks mentioned in this manual are acknowledged to be the pr oper ty of the trademark owners.[...]

  • Page 5

    PSD-4 AND PSD-8 4 1. Specifications Number of Sub-Channels — PSD-4: 4 PSD-8: 8 Channel Configuration — Lowest Priority: Sub-channel 1 Highest Priority: PSD-4: Sub-channel 4 PSD-8: Sub-channel 8 Sub-Channel Selection — R TS/DCD on or data transitions (strap-selectable) Sub-Channel Deselection — R TS/DCD off or 16 bits of idle data (strap-sel[...]

  • Page 6

    CHAPTER 2: Introduction 5 2. Introduction The Programmable Sharing Device enables up to 4 (TL304A) or 8 (TL305A) modems or terminals to share a master modem, multiplexor , or computer port in an asynchronous or synchronous multipoint environment. (Asynchronous and synchronous equipment cannot be mixed on the same PSD.) M AIN C HANNEL The main chann[...]

  • Page 7

    PSD-4 AND PSD-8 6 3. Installation 3.1 Choosing a Site • The PSD must be installed within five feet (1.5 m) of a grounded AC outlet. • The PSD must be within 50 feet (15 m) of the equipment that will be attached to the main channel and each sub-channel. • Allow 36 inches (91 cm) frontal clearance for operating and maintenance accessibility . ?[...]

  • Page 8

    CHAPTER 3: Installation 7 T able 1. Printed Circuit-Board Switch and Strap Settings Possible Factory Stap Identity Location Settings Setting Function MAIN DCE/DTE switch DTE DTE Determines the PSD’s Main Channel DCE interface as either DTE (straight connection to a modem) or as DCE (straight connection to a computer or terminal). Sub-channel DTE [...]

  • Page 9

    PSD-4 AND PSD-8 8 Figure 3. The Printed Circuit Boar d of the PSD-4. Figure 4. The Printed Circuit Boar d of the PSD-8.[...]

  • Page 10

    CHAPTER 3: Installation 9 3.3 System Synchronization A SYNCHRONOUS M ODE Strap the J6 jumper over the ASYNC pins. All attached equipment must be asynchronous. T urn the BIT RA TE rotary switch (BRI) to the correct system speed. No other adjustments to the PSD are necessar y . S YNCHRONOUS M ODE Strap the J6 jumper over the SYNC pins (this is the fa[...]

  • Page 11

    PSD-4 AND PSD-8 10 • BIT RA TE rotar y switch: Set BRI to the correct system speed. • EXT . BUFFER: If any of the devices connected to the sub-channels numbered 1 through 4 are set to internal clock, then switch S1 should be ON. If any of the devices connected to the sub-channels numbered 5 through 8 are set to internal clock, then switch S2 sh[...]

  • Page 12

    CHAPTER 4: Operation and T roubleshooting 11 4. Operation and T roubleshooting 4.1 Operation T urn on the rear-panel POWER rocker switch. The front-panel POWER LED will light. The PSD operates automatically . Except for manually disabling a sub-channel, you will not need to attend to the PSD. 4.2 Changing Setting During Operation If you have to rec[...]

  • Page 13

    PSD-4 AND PSD-8 12 Figure 5. The back panels of the PSD-4 (top) and the PSD-8 (bottom). FUSE POWER: Rocker switch to turn AC power on or off 110/220 VAC Selector: Align either 110 or 220 with the arrow. SCREWS: Loosen these screws to take off the cover of the PSD.[...]

  • Page 14

    CHAPTER 5: T echnical Guide 13 5. T echnical Guide 5.1 Control Signals M AIN C HANNEL C ONTROL S IGNALS RTS (DCD) • In R TS/DCD contention mode: follows R TS (DCD) of the selected sub-channels. • In Data Contention mode: ON if one of the sub-channels R TS (DCD) is ON. CTS On only when the CTS signals of all active sub-channels are ON. A sub-cha[...]

  • Page 15

    PSD-4 AND PSD-8 14 Figure 6. Main Channel DTE with Sub-Channel DCE. Figure 7. Main Channel DTE with Sub-Channel DTE.[...]

  • Page 16

    CHAPTER 5: T echnical Guide 15 Figure 8. Main Channel DCE with Sub-Channel DCE. Figure 9. Main Channel DCE with Sub-Channel DTE.[...]

  • Page 17

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