RAD Data comm Essential Guide to Modem ASM Installation and Operation

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ASM-20Installation and Operation Manual

Chapter 2. Installation and Setup

 

 

Power Connection

Warning

AC power is supplied to ASM-20 through a standard 1.5 m (5 ft) detachable power cord terminated by a standard 3-prong plug. The power inlet on the rear panel incorporates an integral fuse.

Before connecting AC power to this unit, the protective earth terminals of this unit must be connected to the protective ground connector of the (mains) power cord. The mains plug should only be inserted in a socket outlet provided with a protective earth contact. The protective action should not be negated by use of an extension cord (power cable) without a protective conductor (grounding).

Grounding: This unit will become dangerous if the protective (grounding) conductor (inside or outside the unit) is interrupted or if the protective earth terminal is disconnected.

An integral fuse is located above the AC mains socket on the rear panel. Make sure that only fuses of the required rating are used for replacement, as marked on the ASM-20 rear panel. Do not use repaired fuses or short circuit the fuse holder. Always disconnect the mains cable before removing or replacing the fuse.

If the fuse protection appears to have been damaged, render the unit inoperative and secure it against unintended operation.

Electrical Installation

2-7

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Contents ASM-20 RAD data communications Headquarters US East US WestPage Warranty Safety Warnings Ports Safety StatusRegulatory Information Safety Supplementary InformationQuick-Start Guide Installing and Operating ASM-20Adjust the jumpers. See , Installation and Setup INT or EXT and the other modem RCV LBTPreface Conventions Contents Troubleshooting and Diagnostics List of Figures List of Tables Chapter Introduction OverviewApplications DTE interface Following DTE interface options are availablePhysical Description Front PanelCDD conditional diphase modulation technique Functional DescriptionAsync to Sync Converter Technical Specifications Unloaded twisted pair 19 to 26 AWGRange See Table Level Digital Interface Diagnostics Timing ElementsPower Supply 115 or 230 V 10% 47 to 63 Hz 5W PowerRed Bit errors Err Yellow Weight 290 gm / 10.1 ozApproximate Range Baud 19 AWG 22 AWG 24 AWG 26 AWG RateIntroduction Technical Specifications Chapter Installation and Setup IntroductionSite Preparation and Prerequisites Package Contents Mechanical InstallationElectrical Installation Strap Selection Setting Internal Jumpers Switches ASM-20 X.21 Rear PanelPCB Layout Diagram X.21, one of the modems should be set to RCV clockASM-20 Strap Selection Settings Jumper Function Possible Factory Switch Identity SettingsStart Bit Data Bits Parity Stop Bit No. of Bits Power Connection Installation and Setup Electrical Installation General Controls and IndicatorsChapter Operation ASM-20Control and Indicator Functions Name Type FunctionPower On Procedure Operating InstructionsActivation of Tests Operational Jumper Switch Changes Power OffProcedure Differences in Versions Chapter Troubleshooting DiagnosticsFrequently Asked Questions ASM-20 ASM-20-2Loop Tests Procedure Bit Error Rate Tester BertBert Using Loops Modem Self Test Local Test Analog LoopbackCommunication Link Tests Remote Digital LoopbackLocal Digital Loopback Remote ASM-20 in Digital LoopbackChapter Card Cage Version ASM-MN-214 Card CageASM-20/R Card Version ASM-MN-214 Rear PanelPower Supply AC Supply 100, 115 or 230 VAC DC Supply -48 VDCPower Supply with Redundancy ASM-MN-214 Front PanelInstallation Card Cage Version Installation Appendix a Ethernet Interface DescriptionIR-ETH Connector Options Signal Pin DB-25 RJ-45Ethernet Bridge Specifications Installation and OperationGeneral Other devices do not OptionTable A-3 IR-ETH Bridge LED Indicators Description Location Color NameAppendix A. Ethernet Interface Installation and Operation Appendix B IR-G.703 Codirectional Interface 64 kbps General DescriptionEXT Mode Figure B-2 Location of JP1 on the IR-G.703 Interface ModuleINT/RCV Mode Modem BOdem a Odem B Page Appendix C IR-X.21B Interface Module Figure C-1 Typical ASM-20 X.21 ApplicationTable C-1 IR-X.21B DB-15 RS-422 Connector Pin Assignment Interface module $87,21 25&21,18Pin Function IR-X.21B Interface Module PositionFigure C-4 EXT Mode Timing Block Appendix D DTE Interface Connectors Pin Circuit FunctionRTS Signal General 13/4/99 Signal Function RS-449 RS-422/423 EIA Pins Appendix E Connection to RS-422Pin Circuit Appendix E. Connection to RS-422 Installation of a Single Unit Appendix F Unit Case AssemblyInstallation of the Unit Case into a 19 Rack Unit CaseInstallation of Two Units Figure F-1 Installation of a Single UnitAppendix F. Unit Case Assembly Figure F-3 Installation of Two Units