Instruction/ maintenance manual of the product PSD-4 Black Box
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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.
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.
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.
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.
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 Su.
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.
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.
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).
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..
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 .
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.
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.
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.
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.
PSD-4 AND PSD-8 14 Figure 6. Main Channel DTE with Sub-Channel DCE. Figure 7. Main Channel DTE with Sub-Channel DTE..
CHAPTER 5: T echnical Guide 15 Figure 8. Main Channel DCE with Sub-Channel DCE. Figure 9. Main Channel DCE with Sub-Channel DTE..
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..
An important point after buying a device Black Box PSD-4 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Black Box PSD-4 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Black Box PSD-4 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Black Box PSD-4 you will learn all the available features of the product, as well as information on its operation. The information that you get Black Box PSD-4 will certainly help you make a decision on the purchase.
If you already are a holder of Black Box PSD-4, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Black Box PSD-4.
However, one of the most important roles played by the user manual is to help in solving problems with Black Box PSD-4. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Black Box PSD-4 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
