Multitech PS9648 User manual

PS9648 Power Supply
User Guide

PS9648 Power Supply User Guide
P/N 82074300, Revision A
Copyright © 1998 by Multi-Tech Systems, Inc.
All rights reserved. This publication may not be reproduced, in whole or in part, without prior expressed
written permission from Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representation or warranties with respect to the contents hereof and
specifically disclaims any implied warranties of merchantability or fitness for any particular purpose.
Furthermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes
from time to time in the content hereof without obligation of Multi-Tech Systems, Inc., to notify any
person or organization of such revisions or changes.
Revision Date Description
A 3/25/98 Manual Released
Multi-Tech, CommPlete, and the Multi-Tech logo are trademarks of Multi-Tech Systems, Inc. Other
trademarks and trade names mentioned in this publication belong to their respective owners.
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
[phone] or [phone]
U.S. Fax [phone]
Technical Support [phone]
BBS [phone] or [phone]
Fax Back [phone]
Internet Address: http://www.multitech.com

CommPlete Communications Server iii
Federal Communications Commission Statement
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy, and if not installed and used in accordance with the in-
struction manual, may cause harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference, in which case the user will be required to
correct the interference at his own expense.
Warning: Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.

iv CommPlete Communications Server

CommPlete Communications Server
v
Table of Contents
1 Introduction
Introduction ...................................................................................................................................................... 2
Description ........................................................................................................................................................ 2
Features......................................................................................................................................................... 2
Technical Specifications.................................................................................................................................... 3
Manual Organization......................................................................................................................................... 3
2 Installation
Introduction ...................................................................................................................................................... 6
Pre-Installation Notes ....................................................................................................................................... 6
Installation Procedure....................................................................................................................................... 6
3 Operation
Introduction ...................................................................................................................................................... 8
Power Switch ..................................................................................................................................................... 8
Power Indicator................................................................................................................................................. 8
4 Solving Problems
Introduction .....................................................................................................................................................10
LED Indicators..................................................................................................................................................10
Power Supply LED............................................................................................................................................10
Adjustment of the PS9648 Power Supply.........................................................................................................10
Important Safety Considerations.....................................................................................................................11
Fuse Replacement........................................................................................................................................11
Insertion and Removal of a Power Supply ..................................................................................................12
Safety Disconnect Device.............................................................................................................................12
5 Warranty, Service, and Technical Support
Limited Warranty.............................................................................................................................................14
Service...............................................................................................................................................................14
Technical Support ............................................................................................................................................15
Recording Product Information..................................................................................................................15
The Multi-Tech BBS .........................................................................................................................................16
Logging onto the Multi-Tech BBS ...............................................................................................................16
Downloading a File ......................................................................................................................................16
Reading a Message.......................................................................................................................................17
Leaving a Message........................................................................................................................................17
Bulletins .......................................................................................................................................................17
About CompuServe...........................................................................................................................................17
About the Internet............................................................................................................................................18
About the Multi-Tech Fax-Back Service ..........................................................................................................18
Index

vi CommPlete Communications Server

CommPlete Communications Server 1
1 Introduction

PS9648 Power Supply User Guide
2CommPlete Communications Server
Introduction
This manual describes the field installation of a Multi-Tech PS9648 power supply into a CommPlete
Communications Server CC9648 chassis. Installation and troubleshooting of the PS9648 should be
performed only by qualified service personnel.
Description
The PS9648 is a universal input switching power supply for the CommPlete Communications Server. Two
PS9648 power supplies are installed as standard equipment in each CommPlete CC9648 chassis. The
outputs of the two power supplies are connected in parallel to the CC9648 chassis power bus. If any of the
outputs on either power supply fails or is too low, the other power supply takes over with no switchover
time, and supplies all the power required to run the system. (This assumes that both power supplies are
turned on.)
Features
•Dual redundant, universal input switching supply.
•Front panel on/off switch and power LED indicator.
•Power LED lights only if all outputs are good.
•Outputs paralleled for redundancy.
•No switchover time for redundant supply takeover.
•Short circuit protection on all outputs.
•Over-voltage protection on 5 VDC output
•Logic level output signal for “All voltages OK.”

1 Introduction
CommPlete Communications Server 3
Technical Specifications
Input voltage 40 to 72 VDC
Input current 10 A @ 48 V at full load
Output voltage at
maximum current
5 VDC @ 65 A
21 VDC @ 0.5 A
5 V regulation ± 1% at full load
Indicator LED for power good indication
Environmental Temperature range: 0°–40° C (32°–104° F)
Humidity range: 0–95% (noncondensing)
Dimensions 7.3 cm × 17.1 cm × 29.8 cm (H × W × D)
2.88 in.× 6.75 in.× 11.75 in. (H × W × D)
Weight 2.27 kg (4 lb 9 oz.)
Limited Warranty Two years
Fuses 12 A 250 V fast blow (non-user replaceable)
Manual Organization
Chapter 1 Introduction
This chapter describes the PS9648, gives its technical specifications, and provides a guide to the
organization of the manual.
Chapter 2 Installation
This chapter describes how to install the PS9648 into the CommPlete chassis
Chapter 3 Operation
This chapter describes briefly how to operate the PS9648 power supply.
Chapter 4 Solving Problems
This chapter describes how to troubleshoot the PS9648 and adjust the output.
Chapter 5 Warranty, Service, and Technical Support
This chapter describes the warranty, and how to obtain technical support.

CommPlete Communications Server 5
2 Installation

PS9648 Power Supply User Guide
6CommPlete Communications Server
Introduction
This chapter describes how to install the PS9648 power supply into a CommPlete Communication Server
CC9648 chassis. This equipment should be installed only by a qualified service person.
Pre-Installation Notes
•All installation must be done by a qualified service person.
•Warning: Interconnection directly, or by way of other apparatus, of ports marked “SAFETY
WARNING see instructions for use” with ports marked or not so marked may produce hazardous
conditions on the network. Advice should be obtained from a competent engineer before such a
connection is made.
•Warning: Ports that are connected to other apparatus are defined as SELV. To ensure conformity to
EN 41003, ensure that these ports are only connected to the same type on the other apparatus.
•To reduce emissions, be sure to use blanking plates to cover empty slots in the CC9648 chassis.
Installation Procedure
1. Unpackthe PS9648 assembly from its packaging andsavethe packagingfor possible future use.Perform a visual inspection of
the PS9648. If youare concerned about itscondition,call Technical Support forinstructions.
2. Makesure the PS9648power switch is in the off (O)position.
3. Remove thecover plate on theCC9648if necessary.The PS9648 is hot-swappable.
4. Holding thePS9648bythe front panel and bottom corners, placethe PS9648 into the open power supply slot.Makesure that
the toprailsonthe PS9648mate properly withthe plastic guidesinthe CC9648.
5. Slowly slidethe PS9648into theCC9648chassisuntil youfeel thePS9648’s connectorsmate with the CC9648’s connectors.
6. Tighten thePS9648’s retainingscrews.
7. Turnthe PS9648power switch on to the on (I)position.
8. Observethe PS9648“outputs good”LED.If it is notlit,seeChapter 4.If it is lit, proceed with normal CommPlete
CommunicationsServeroperation.
9. Afteryouturnon the powersupplies,youshouldcheckthe 5Voutput.Seepage10for details.The suppliescanbere-checked
aspartofyour regularsystemmaintenance.

CommPlete Communications Server 7
3 Operation

PS9648 Power Supply User Guide
8CommPlete Communications Server
Introduction
This chapter provides information about operating your PS9648 Power Supply after it is installed.
Power Switch
The PS9648 has a power switch on the front panel that is labeled with the international I(on) and O(off)
symbols. For the most reliable operation, both power supplies should be turned on whenever the
CommPlete Communications Server is operating.
Power Indicator
The power indicator lights if all outputs are good. If any one of the outputs on the power supply goes bad,
this indicator goes out. If a power supply fails and the redundant power supply is installed and turned on,
the good power supply takes over with no switchover time.

CommPlete Communications Server 9
4 Solving Problems

PS9648 Power Supply User Guide
10 CommPlete Communications Server
Introduction
This chapter provides information needed to identify and fix problems with the PS9648 power supply
module. Problems can be observed on the CommPlete system’s front panel LEDs, the control PC’s screen,
or via audio alarm or alarm report. In addition, problems can be found when performing the Diagnostic
Tests documented elsewhere in the CommPlete Communications Server
User Guide .
LED Indicators
The CommPlete Communication Server’s front panels contains the following indicators.
•MR9600 controller LEDs.
•Modem card LEDs. The number of LEDs on your modem card may vary, depending on the type of
modem card in your chassis. Please refer to your modem’s user guide for LED descriptions.
•PS9648 power supply LED.
The PS9648 power supply LED is described below. Each of the other LED indicators is described in the
applicable manual.
Power Supply LED
This LED goes out if one of the PS9648 power supply outputs goes low or fails altogether. In normal
operation it is lit. The recovery procedure to be used depends on whether the CommPlete chassis has one
or two PS9648 power supplies installed.
Indication: LED is on (either one or two PS9648s installed).
Meaning: The power supply (or supplies) are operating properly.
Recovery: No action required.
Indication: LED is off (one PS9648 installed).
Meaning: At least one of the outputs is low or out.
Recovery: Turn off the power supply, remove it, and check the fuse. Replace the fuse if it is blown;
call Technical Support if the fuse is good (Chapter 5).
Indication: LED is off (two PS9648s are installed).
Meaning: At least one of the outputs is low or out. Power is being supplied by the second PS9648.
Recovery: Turn off the PS9648 that has the LED off, and remove the PS9648. If fuse is blown, it must
be replaced b
y
a qualified service technician (Chapter 5); call Technical Support if the fuse
is good (Chapter 5).
Adjustment of the PS9648 Power Supply
For optimal operation of the CommPlete Communications Server, the 5 V output of the PS9648 power
supply should be adjusted to 5.1 VDC. The 5-volt test points are located on the back of the chassis between
the power supply fans.

4 Solving Problems
CommPlete Communications Server 11
Procedure
1. Turnoffthepowersupplythatisnotbeingadjusted.
2. Placeyourvoltmeter’sprobeson the testpoints.
3. Twotrimpots,one for eachpowersupply, arelocatedonthebackof thechassisbetweenthe powersupplyfans.Adjustthe5
volttrimpot thatisclosesttothepower supplythat youaretestingto5.1VDCbyturning itclockwiseto increasethe voltage,or
counterclockwise todecreasethevoltage.
4. Checkthe measurement.
5. Repeattheabovesteps,asnecessary,untilthevoltageiscorrect.
6. Repeat forthe secondPS9648 supplywith thefirstPS9648 powersupply turnedoff.
KEYBOARD VIDEO CONFIG PORT ALARM
T1IN OUT
MONITOR
KEYBOARD VIDEO CONFIG PORT ALARM
T1IN OUT
MONITOR
KEYBOARD VIDEO CONFIG PORT ALARM
T1IN OUT
MONITOR
KEYBOARD VIDEO CONFIG PORT ALARM
T1IN OUT
MONITOR
-48V 0V-48V 0V
Figure 1. Power supply connectors and test points
Important Safety Considerations
Fuse Replacement
There is one replaceable fuse in the PS9648 power supply. Qualified service personnel may replace the fuse
with one of the same type and rating as indicated on the PS9648 Fuse Label.
DC power (left power supply)
5 V test point (SELV)
5 V adjust (left power supply)
0 V test point (SELV)
5 V ad
j
ust
(
ri
g
ht
p
ower su
pp
l
y)
DC power (right power supply)

PS9648 Power Supply User Guide
12 CommPlete Communications Server
Insertion and Removal of a Power Supply
Qualified service personnel may insert or remove a power supply without turning off the system. We
recommend that you insert the power supply slowly. If the power supply is not replaced, a cover plate
must be installed.
Safety Disconnect Device
The switches on the power supplies are not safety disconnect devices. To reduce the risk of electric shock,
unplug the two input power cords from the back of the CC9648.
Install the power outlet near the CC9648, and place the equipment so that the outlet is easily accessible.

CommPlete Communications Server 13
5 Warranty, Service, and
Technical Support

PS9648 Power Supply User Guide
14 CommPlete Communications Server
Limited Warranty
Multi-Tech Systems, Inc. (“MTS”) warrants that this product will be free from defects in material or
workmanship for a period of two years from the date of purchase, or, if proof of purchase is not provided,
two years from date of shipment.
MTS MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED,ANDALLIMPLIEDWARRANTIESOF
MERCHANTABILITYAND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.
This warranty does not apply to any products which have been damaged by lightning storms, water, or
power surges or which have been neglected, altered, abused, used for a purpose other than the one for
which they were manufactured, repaired by the customer or any party without MTS’s written
authorization, or used in any manner inconsistent with MTS’s instructions.
MTS’s entire obligation under this warranty shall be limited (at MTS’s option) to repair or replacement of
any products which prove to be defective within the warranty period, or, at MTS’s option, issuance of a
refund of the purchase price. Defective products must be returned by Customer to MTS’s factory,
transportation prepaid.
MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES AND UNDER NO CIRCUMSTANCES
WILL ITS LIABILITY EXCEED THE PURCHASE PRICE FOR DEFECTIVE PRODUCTS.
Service
If your technical support specialist decides that service is required and you are outside the USA, your local
distributor of Multi-Tech products usually offers the quickest and most economical repair option. If
necessary, you may send your Multi-Tech product to our Mounds View factory in the USA. A modem that
is shipped to us from outside the USA must have a Returned Materials Authorization (RMA) and shipping
instructions. To return a modem for repair from inside the USA, no RMA is required; simply send it to us
freight prepaid. Include a description of the problem, return billing and shipping addresses, a check or
purchase order for out-of-warranty repairs, and, if possible the name of the technical support specialist
you spoke to.
If you need to inquire about the status of the returned product, be prepared to provide its serial number.
Please send modems that require repairs to the following address:
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, MN 55112
Attn: Repair
If you are shipping from outside the USA, please contact our Repair Department for an RMA prior to your
shipment. You can contact us by telephone at +[phone] or by fax at +[phone].