ADC T1MF2S04RA, HMS-318, LTPH-UM-1261-01 User Manual
HiGain® Managed Shelf
19-inch, 3190 Mechanic, 22-Slot Managed
CO Shelf (HMS-318 List 3)
User Manual
CLEI:
Product Catalog:
Document Number:
T1MF2S04RA
HMS-318 List 3
LTPH-UM-1261-01
REVISION HISTORY
The Revision History provides a summary of any changes in this manual. Please make sure you are using the
latest revision of this manual.
December 20, 2004
Revision Release Date Revisions Made
01 December 20, 2004 Initial Release
This manual is available online at ADC’s website (www.adc.com/documentationlibrary/) or you can order copies
of the manual by contacting your sales representative. Please ask for document LTPH-UM-1261-01.
Copyright
©2004 ADC Telecommunications, Inc. All rights reserved.
Trademark Information
ADC is a registered trademark of ADC T e lecommunications, Inc. LoopS t ar is a trademark of ADC Telecommunications, Inc.
No right, license, or interest to such trademarks is granted hereunder, and you agree that no such right, license, or interest
shall be asserted by you with respect to such trademark.
Other product names mentioned in this practice are used for identification purposes only and may be trademarks or registered trademarks of their respective companies.
Disclaimer of Liability
Information contained in this document is company private to ADC Telecommunications, Inc., and shall not be modified,
used, copied, reproduced or disclosed in whole or in part without the written consent of ADC.
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.
In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits, and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other similar dama ges. This disclaimer of
liability applies to all products, publications and services during and after the warranty period.
Table of Contents
About This Manual ..........................................................................................................ix
Introduction ...............................................................................................................................ix
Audience ...................................................................................................................................ix
Related Publications .................................................................................................................ix
Organization ..............................................................................................................................ix
Conventions ...............................................................................................................................x
EU Compliance .........................................................................................................................xi
Safety Guidelines ......................................................................................................................xi
Inspecting Your Shipment ........................................................................................................xii
Chapter 1: Product Description .................................................................................... 1-1
Typical HMS-318 List 3 Shelf Applications .............................................................................. 1-2
Power and Alarm Connections ................................................................................................. 1-5
Connecting to HDSL, HDSL2, and HDSL4 Circuits ................................................................. 1-8
Connecting Sp a n Po wered xDSL Circuits to the HMS-318 List 3 Shelf ................................1-10
RS-232/X.25 Remote Management Ports ............................................................................. 1-12
Ethernet Remote Management Ports .................................................................................... 1-13
Heat Dissipation Factors ........................................................................................................ 1-13
Air Flow Guidelines ................................................................................................................ 1-15
Chapter 2: Installation .................................................................................................... 2-1
Before You begin ...................................................................................................................... 2-1
Safety Guidelines .....................................................................................................................2-4
Mounting the HMS-318 List 3 Shelf ......................................................................................... 2-4
DSX-1 and HDSLx Connections ..............................................................................................2-7
Sp a n Po wered xDSL Conne ctions ........................................................................................... 2-8
Bonding (Safety) Ground, Power and Frame Ground, Alarm, and Optional Fan Inputs ......... 2-9
Installing the HMU-319 with HLU-319, H2TU-C-319, H4TU-C-319 .......................................2-13
Installing LPS-300C Power Module ....................................................................................... 2-13
Appendix A: Signal and Pin Assignments .................................................................A-1
Appendix B: Standard PIC Color Code ......................................................................B-1
Appendix C: Circuit Card Preventive Measures ........................................................C-1
Handling Circuit Cards .............................................................................................................C-1
Storing Circuit Cards ................................................................................................................C-1
Installation/Replacement ..........................................................................................................C-1
Appendix D: Specifications .........................................................................................D-1
Appendix E: Product Support .....................................................................................E-1
Glossary ......................................................................................................................GL-1
LTPH-UM-1261-01 iii
Table of Contents December 20, 2004
iv LTPH-UM-1261-01
List of Figures
Figure 1-1. HMS-318 List 3 Shelf - Front View ......................................................... ..........1-2
Figure 1-2. HMS-318 List 3 Shelf - Rear View ....................................................................1-3
Figure 1-3. Input Power Terminal Block (TB1) ....................................................................1-5
Figure 1-4. Alarms Wire-Wrap Field (TB2) ............................................................... ..........1-6
Figure 1-5. HLU Slot Wire-wrap Pinouts for HDSL Circuits ................................................ 1-9
Figure 1-6. HLU Slot Wire-wrap Pinouts for HDSL2 Circuits .............................................. 1-9
Figure 1-7. HLU Slot Wire-wrap Pinouts for HDSL4 Circuits ............................................1-10
Figure 1-8. HLU Slot Wire-wrap Pinouts for Span Powered xDSL ................................... 1-11
Figure 1-9. HMS-318 List 3 Shelf RS-232/X.25 Remote Management Ports ..................1-12
Figure 1-10.Multishelf Network Ports ........................................................... .............. ........1-13
Figure 1-11.Central Office Equipment Rack Configuration ................................................1-14
Figure 2-1. Grounding Lug ................................................................................................2-10
Figure 2-2. Input Power Terminal Block (TB1) .................................................................. 2-11
Figure 2-3. Alarms Wire-wrap Field (TB2) ........................................................................2-12
LTPH-UM-1261-01 v
List of Figures December 20, 2004
vi LTPH-UM-1261-01
List of Tables
Table 1-1.HMS-318 List 3 Shelf Rear-Panel Connections (LPS-300C) ..............................1-4
Table 1-2.Alarms Wire-wrap Field Functional Description ..................................................1-7
Table 1-3.J26 – RS-232/X.25 Management Port (DTE) ...................................................1-12
Table 1-4.J27 – AUX RS-232 Management Port (DTE) ...................................................1-13
Table 2-1.HMS-318 List 3 Shelf Parts List ..........................................................................2-2
Table A-1.P1-DSX-1 Receive or Span Powered xDSL B IN, Tip and Ring .........................A-1
Table A-2.P2-DSX-1 Transmit or Span Powered xDSL A IN, Tip and Ring ............ ............A-2
Table A-3.P3-HDSL Span 1 or Span Powered xDSL A OUT, Tip and Ring ........................A-4
Table A-4.P3-HDSL Span 1 or Span Powered xDSL A OUT, Tip and Ring ........................A-5
Table B-1.Standard PIC Color Code ....................................................................................B-1
LTPH-UM-1261-01 vii
List of Tables December 20, 2004
viii LTPH-UM-1261-01
ABOUT THIS MANUAL
INTRODUCTION
This manual provides essential information about the HiGain® Management Shelf (HMS-318 List 3) along with stepby-step instructions on how to install the shelf into a Central Office (CO) or telco-style equipment rack.
AUDIENCE
This manual is written for people who install and plan the installation of ADC products in a Central Of fice
environment. If you are an installer, technician, or a local craft person, this manual contains in formation you ca n use
to install the HMS-318 List 3 shelf. It also provides information that can help you plan and make decisions about
your installation.
This manual is also appropriate for managers and planners who are thinking about inst alling HMS-318 List 3 shelves
into a CO or telco-style equipment rack, as well as people who are interested in the HMS-318 List 3 shelf in general .
This manual is written with the assumption that you are familiar with ADC equipment shelves or equivalent hardware
and cabling, electronic circuitry, and wiring practices.
RELATED PUBLICATIONS
Listed below are related ADC publications and their document catalog numbers. These document s pr ovide
supplementary information for the HMS-318 List 3 Shelf User Manu al. Copies of these manuals are available online
at ADC’s web site at www .adc.com/documentationlibrary/
your sales representative.
or you can order copies of these documents by contacting
Note: The list of related publications is not all-inclusive. It is only a representative sampling of the instruction
manuals that are available. Depending on your particular product model and List number, refer to that
instruction manual for proper installation and provisioning information.
Catalog Number Title
350-319-105 HLU-319 List 5 Quick Installation Guide
LTPH-UM-1182 H2TU-C-319 List 7 User Manual
LTPH-QI-1032 H4TU-C-319 List 1 Quick Installation Guide
LTPH-UM-1142 HMU-319 L7AV32 and L9V32 User Manual
SCP-LPS300-010 LoopStar LPS-300C L1 Power Module Technical Practice
ORGANIZATION
This manual includes the following chapters:
Chapter Description
Chapter 1: Product Description Summarizes the HMS-318 List 3 configuration, including details
on power and alarm connections, connecting to HDSL, HDSL2,
HDSL4 and xDSL circuits, and remote management via RS-232
and Ethernet interfaces.
Chapter 2: Installation Provides installation instructions for mounting the shelf,
connecting DSX/HDSL/xDSL connections, grounding the shelf ,
and installing the HMU-319, HLU-319, H2TU-C-319,
H4TU-C-319, and LPS-300C power module, as necessary.
LTPH-UM-1261-01 ix
About This Manual December 20, 2004
Chapter Description
Appendix A: Signal and Pin Assignments Lists Tip and Ring signal and pin assignments to the HMS-318
List 3 shelf, including:
• P1-DSX-1 Receive or xDSL B IN, Tip and Ring
• P2-DSX-1 Transmit or xDSL A IN, Tip and Ring
• P3-HDSL Span 1 or xDSL A OUT, Tip and Ring
• P4-HDSL Span 2 or xDSL B OUT, Tip and Ring
Appendix B: Standard PIC Color Code Lists the standard PIC color codes with the Pair Number cross-
referenced with the colors of the Tip and Ring wires used by the
installer.
Appendix C: Circuit Card Preventive
Measures
Appendix D: Specifications Provides power requirements, physical dimensions,
Appendix E: Product Support Provides information on how to contact the ADC Technical
Glossary Defines abbreviations and acronyms used in this document and
Describes the preventive measures that should be observed
when using the shelf, including:
• Handling and storing of circuit cards
• Installing/replacing circuit cards sensitive to static electricity
recommended operational and storage environments, and
accessories for the HMS-318 List 3 shelf.
Support group.
that relate to the HMS-318 List 3 shelf.
CONVENTIONS
The following style conventions and terminology are used throughout this guide.
Element Meaning
Bold font Text that you must input exactly as shown (e.g., type 1 for card 1), menu buttons
(e.g., ACCEPT SHELF OPTIONS) or menu screen options (e.g., ALARMS screen) that
you must select
Italic font Variables that you must determine before inputting the correct value (e.g., Password )
Monospace font References to screen prompts (e.g., Invalid Password...Try Again:.)
Reader Alert Meaning
Alerts you to supplementary information
IMPORTANT
Alerts you to supplementary information that is essential to the completion of a task
!
Alerts you to possible equipment damage from electrostatic discharge
ATTENTION
x LTPH-UM-1261-01
December 20, 2004 About This Manual
Reader Alert Meaning
CAUTION
Alerts you to possible data loss, service-affecting procedures, or other similar type
problems
WARNING
DANGER
Alerts you that failure to take or avoid a specific action might result in hardware damage or
loss of service
Alerts you that failure to take or avoid a specific action might result in personal harm
EU COMPLIANCE
The product complies with the requirements of the Low Voltage Directive 73/23/EEC, EMC Directive 89/336/EEC,
and the R&TTE Directive 1999/5/EC Articles 3.1a and 3.1b.
SAFETY GUIDELINES
The following safety guidelines are presented to help you avoid injury to yourself and avoid damage to the
equipment. These guidelines are recommended when working with any equipment that connect s to electrical power
or telco wiring.
• Locate the emergency power-off switch for the area in which you are working before beginning any procedures requiring access to the telco-style equipment rack. Then, if an electrical accident occurs, you can
quickly shut off the power.
• Disconnect all power before doing the following:
– Installing or removing the shelf
– Working near power supplies
• Never work alone if potentially hazardous conditions exist.
• Never assume that power has been disconnected from a circuit; always check.
• Never perform any action that creates a potential hazard to people or makes the equipment unsafe.
• Carefully examine your work area for possible hazards, such as moist floors, ungrounded power extension
cables, and missing safety grounds.
• Keep the work area free of obstructions before, during , and after shelf installation.
• If an electrical accident occurs, proceed as follows:
– Use caution; do not become a victim yourself.
– Turn power off to the telco-style rack that the shelf is located in.
– If possible, send another person to get medical aid. Otherwise, determine the condition of the victim and
then call for help.
– Determine if the victim needs rescue breathing or external cardiac compressions; then take appropriate
action.
• Circuit Overloading - Consideration should be given to the connection of the equipment to the supply circuit
and the effect that overloading of the circuits might have on overcurrent protection and supply wiring. Appropriate consideration of equipment nameplate ratings should be used when addressing this concern.
• Reliable Earthing - Reliable earthing of rack-mounted equipment should be maintained. Particular attention
should be given to supply connections other than direct connections to the branch circuit (e.g., use of power
strips).
• The following precautions may appear in this manual in procedures that, if performed incorrectly, may harm
you or your equipment.
LTPH-UM-1261-01 xi
About This Manual December 20, 2004
DANGER
To prevent electrical shock, be careful whe n working near HDSL loops and telecommunications
circuits. Coming in contact with high electrical potential will result in death or severe personal
injury.
IMPORTANT
!
DANGER
The shelf chassis must be properly grounded to ensure personal and equipment safety.
To prevent electrical shock, never install telco equipment in a wet location or during a lightning
storm. When installing or modifying telco lines, disconnect lines on the network side before
working with uninsulated lines or terminals.
DANGER
To prevent electrical shock, be careful when wor king near power supplies. Telco equipment uses
-48 Vdc office power.
Electronic components can be damaged by electrostatic discharge (ESD). Before handling circuit
cards, wear an antistatic discharge wrist strap to prevent damage to electronic components.
ATTENTION
Place components in static-shielding protective bags when transporting or storing. When
working on components, always place them on an approved antistatic mat that is electrically
grounded.
INSPECTING YOUR SHIPMENT
Upon receipt of the equipment:
• Unpack each container and visually inspect the contents for signs of damage. If the equipment has been damaged in transit, immediately report the extent of damage to the transportation company and to ADC. Order
replacement equipment, if necessary.
• Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short
or irregular, contact ADC as described in Appendix E: Product Support on page E-1. If you must store the
equipment for a prolonged period, store the equipment in its original co ntainer.
xii LTPH-UM-1261-01
Chapter
1
PRODUCT DESCRIPTION
The HMS-318 L3 is a 22-slot, 3190 mechanics shelf that is capable of being managed locally or remotely. It can be
mounted in a 19-inch rack and is fully NEBS 3 and UL-60950 complaint.
®
The ADC HiGain
in. wide x 5.22 in. high x 12 in. deep (43.9 cm x 13.3 cm x 30.5 cm). These dimensions do not include the mounting
brackets that are factory-installed to the shelf.
The HMS-318 List 3 shelf can be mounted in three different types of rack mount configurations:
• A standard (EIA or WECO) 19-inch (48.3-cm) Central Office (CO) or telco-style equipment rack (using the
mounting rack adapter brackets provided). These brackets can be positioned for either 2- or 5-inch recess.
• A standard (EIA or WECO) 23-inch (58.4-cm) Central Office (CO) or telco-style equipment rack (using the
optional Extender Bracket: EB-52). These brackets can be positioned for either 2- or 5-inch recess.
• A European Telecommunications Standards Institute (ETSI) telco-style rack mounting (using ETSI mounting
adapter brackets and hardware provided).
The HMS-318 List 3 shelf supports:
• 1.544 Mbps (T1) full-duplex transmission over two uncondition ed, non-load ed copper loops
• DSX-1 interfaces at the CO and the remote end, with remote provisioning and performance monitoring
• CO power modules (LPS-300C) which provide xDSL span powering to ADC’s LoopStar
(AP) solution.
The HMS-318 List 3 shelf is shipped with:
• Adjustable mounting brackets ( as described above) that allow the shelf to be positio ned in the equipment r ack to
match the recess of the existing equipment (either 2- or 5-inch mounting).
• HMS-318 List 3 Shelf Rack Mounting Kit:
– 3 x 5 inch label holder (1)
– Label, HMS-318 (1)
– BNC-T female connector (1) – used with 10 BASE-2 managed systems
– 50-ohm BNC terminator (1) – used with 10BASE-2 managed systems
– #12-24 x .5 inch mounting screws (4).
• ETSI mounting hardware:
– #6-32 x 0.250 inch mounting Phillips head screws w/lock washer (8)
– M6-1.0 x14 mm mounting panhead screws (4)
• Shelf grounding kit:
– #10-32 x .5 inch mounting Hex screw w/washer (1)
– Ring terminal stud, taped 12-10 AWG (1)
– ground jumper, 2-position (1)
– Cable ties (10)
• ETSI mounting brackets (2)
• This instruction manual, HiGain Management Shelf (HMS-318 List 3) User Manual, catalog number
LTPH-UM-1261.
The following optional accessories are available:
• Extender Bracket Kit, 5.25 inches high for mounting a shelf into a 23-inch (58.4-cm) telco-style equ ip ment rack
Management Shelf (HMS-318 List 3) weighs approximately 17 pounds (7.7 kg). It measures 17.3
™
Wi-Fi® Access Point
LTPH-UM-1261-01 1-1
Chapter 1: Product Description December 20, 2004
y
A
R
TYPICAL HMS-318 LIST 3 SHELF APPLICATIONS
Capable of using various components in different types of applications, the HMS-318 List 3 shelf is designed as a
very adaptable shelf. It can be used in the following applications:
• Managed HDSLx configuration - HMU-319 (HiGain Manag ement Unit) with HLU-3 19, H2TU-C-319, or H4TU-C319 (HiGain Line Unit) configuration
• LoopS tar™ (LPS-300C) Power Module configuration (for Wi-Fi)
The HMU-319 with HLU-319/H2TU-C-319/H4TU-C-319 use 23 slots in the HMS-318 List 3 shelf. The first 22 slots
are for the HLU-319/H2TU-C-319/H4TU-C-319 and the 23rd slot is for the HMU-3 19 (for in for matio n about
installation and provisioning, see “Installing the HMU-319 with HLU-319, H2TU-C-319, H4TU-C-319” on page 2-13
and refer to “Related Publications” on pageix).
The LPS-300C Power Module configuration is a double-wid th module th at su ppor ts two Span Powered xDSL or
ADSL pairs per module and is used as an integral part of the LoopStar Wi-Fi span powered Access Point (AP)
solution. A total of 11 LPS-300C modules can be installed in the UL-60950 compliant HMS-318 List 3 po wer shelf for
a total of 22 span powered pairs (for infor mation about inst allation and provisioning, see “Installing LPS-300 C Power
Module” on page 2-13 and refer to “Related Publications” on page ix).
The following front and rear views show the HMS-318 List 3 shelf using the HMU-319 and HLU-319 configuration
and the LPS-300C.
HMS-318 List 3 Front View
On the front panel, viewing from left to right, the HMS-318 List 3 shelf (see Figure 1-1) shows the orientation of the
following components:
• HiGain Line Unit (HLU): first 22 (HLU1-HLU22) slots
• HiGain Management Unit (HMU): last or 23rd slot.
Communications between the HMU slot and the HLU card slots is routed through the rear panel.
• LPS-300C: the first 22 [odd numbered slots (1, 3, 5, 7, ... 21 connections)] slot
1
-1261
01
5.22 in.
(13.26 cm)
HMU
HLU 1-22 single-wide cards
LPS-300C 1-11 double-wide cards (fits in odd-numbered slots onl
)
Figure 1-1. HMS-318 List 3 Shelf - Front View
1-2 LTPH-UM-1261-01
December 20, 2004 Chapter 1: Product Description
J
HMS-318 List 3 Rear View
The HMS-318 List 3 shelf input power, 5-position terminal block (labeled TB1) and the alarms (labeled Alarms) wirewrap connections are located on the rear panel (see Figur e 1-2). The Bonding (Safety ground) is located on the
upper right corner extension of the right p anel. The la bel (BONDING WIRE MIN #10 AWG) is located on the right
corner of the rear panel (see Grounding Lug and Hexhead Screw, Figure 1-2).
Managed HDSLx configuration
Also located on the rear panel, connectors P1 and P2 (labeled CO PAIR 1 and 2) are DSX-1 receive and transmit
connections. Connectors P3 and P4 (labeled SPAN PA IR 1 and 2) are HDSL Spans (Loops 1 and 2) receive and
transmit connections (see Figure 1-2). All of these plug-in connectors (P1, P2, P3, and P4) are 50-pin Amphenoltype male connectors and provide Tip and Ring for all the cards in the shelf. For information on the signal and pin
assignments, see Appendix A: ”Signal and Pin Assignments” on page A-1.
LoopSt ar™ (L PS-3 00C) Power Module configuration (for Wi-Fi)
Also located on the rear panel (for Visual & Audible Alarm Contact operation, install an HMU-319), connectors P1
and P2 (labeled CO P AIR 1 and 2) are xDSL B and A IN transmit and receive connections, r espectively. Connectors
P3 and P4 (labeled SPAN PAIR 1 and 2) are xDSL A and B OUT transmit and receive connections, respectively
(see Figure 1-2). All of these plug-in connectors (P1, P2, P3, and P4) are 50-pin Amphenol-type male con nector s
and provide Tip and Ring for all the cards in the shelf. For information on the signal and pin assignments, see
Appendix A: ”Signal and Pin Assignments” on page A-1.
Table 1-1 on page 1-4 provides a description of each rear-panel component.
Alarms wire-wrap
field (TB2)
J22
24J25J27
10 BASE-2
10 BASE-T
02A-1261R1
OS RS232 PORT
J23
J26
Connector (P3)
Connector (P1)
AUX RS232 DTE PORT
SPAN PAIR 1
CO PAIR 1
1234
-48VA-48VBBATRTNFGND
Input Power
Terminal Block
(T 1)B
Figure 1-2. HMS-318 List 3 Shelf - Rear View
Connector (P2)
CO PAIR 2
Grounding Lug
and Hexhead Screw
5
SPAN PAIR 2
J1
Connector (P4)
LTPH-UM-1261-01 1-3
Chapter 1: Product Description December 20, 2004
T able 1-1. HMS-318 List 3 Shelf Rear-Pane l Connections (LPS- 300C)
Connector/Terminal
Block Connector T ype Connectory Label Description
J24 BNC-T (Female) 10 BASE-2 10BASE-2 Management
Port
J25 RJ-45 10 BASE-T 10BASE-T Management
Port
J26 RS-232 DB-25 (Female) OS RS232 DTE PORT RS-232/X.25 Management
Port
J27 RS-232 DB-25 (Female) AUX RS232 DTE PORT Auxiliary RS-232
Management Port
P1 Amphenol 50-pin (Male) CO PAIR 1 DS1/xDSL B IN Tip and
Ring (non-powered xDSL
signal to and from the
DSLAM)
P2 Amphenol 50-pin (Male) CO PAIR 2 DS1/xDSL A IN Tip and
Ring (non-powered xDSL
signal to and from the
DSLAM)
P3 Amphenol 50-pin (Male) SPAN PAIR 1 HDSL/xDSL A OUT Tip
and Ring (bi-directional
span powered xDSL signal
to and from the Customer
Premises)
P4 Amphenol 50-pin (Male) SPAN PAIR 2 HDSL/xDSL B OUT Tip
and Ring (bi-directional
span powered xDSL signal
to and from the Customer
Premises)
J1 - J22 20-pin wire-wrap J1 - J22 HLU connectors
J1 - J22 20-pin wire-wrap J1 - J22 (odd-numbered
LPS-300C connectors
slots only)
J23 DIN 96-pin (Female) J23
HMU connector
a
TB1 5-position terminal block TB1 Input Power connector
TB2 26-pin wire-wrap field Alarms Alarm connector
a.Not used in LPS-300C Power Module configuration.
1-4 LTPH-UM-1261-01
December 20, 2004 Chapter 1: Product Description
5
POWER AND ALARM CONNECTIONS
The HMS-318 List 3 shelf has a separate split input power (TB1) and an Alarms wire-wrap field (TB2). The following
paragraphs provide information about TB1 and TB2.
Safety Precautions
Observe the following general precautions and recommendations in planning the source power r equirements for th e
HMS-318 List 3 shelf (for additional safety infor mation, please r efer to the section describ ing the “Safety Guidelines”
on page xi):
• Check the power at your site before shelf installation (an d periodically af ter inst allation) to ensure clean power is
being received.
• Always disconnect the power source and unplug all the power cables before working on the shelf.
• Install proper grounding for the site to avoid damage from lightning and power su rges.
DANGER
To avoid electrical shock, be careful when working near power supplies. Telco equipment uses 48 Vdc office power.
Input Power Terminal Block
CAUTION
Before making any power connections (CO primary power feeds A and B) to the HMS-318 List 3
shelf, ensure that the Main CO power breaker is off. Otherwise, severe injury to the installer or
damage to the unit may result.
The 5-position input power terminal block (TB1, see Figure 1-3) provides a central connection point for the CO
primary power feeds (A and B).
1234
TB1
-48VA
-48VB
FUSE
FUSE
15A MAX 15A MAX
BAT RTN
US E
SUPPLIED BRIDGE
FGND
Figure 1-3. Input Power Terminal Block (TB1)
HMS-318 List 3 Shelf Input Power Connections
The input power terminal block supports split -48V battery power bussing. Slot s 1 through 11 on the HMS-318 List 3
shelf are powered by the -48 Vdc A bus (labeled -48VA). Slots 12 through 22 are powered by the -48 Vdc B bus
(labeled -48VB). The two GND terminals are tied together. In the HMU/HLU configuration, the HMU-319 is diodeOR’ed to both power busses, to guard against power failure in the event that one power supply is lost. This feature
requires the two ground terminals to be tied together on the HMU card (for proper power and grounding of the HLU319 and HMU-319, see “Related Publications” on page 1-ix and choose the most appropriate instruction manual for
your product).
LTPH-UM-1261-01 1-5
Chapter 1: Product Description December 20, 2004
Alarms Wire-Wrap Field
IMPORTANT
!
Before making power connections (CO primary power feeds A and B) to the HMS-318 List 3 shelf,
ensure that the Main CO power breaker is off. Otherwise, sev ere injury to the installer or damage
to the unit may result.
Terminate the alarm leads from the CO alarm system to the HMS-318 List 3 shelf. The Alarms wire-wrap field (TB2,
see Figure 1-2) is a 26-pin wire-wrap connector and provides a central connection point to the Normally Closed
(NC), Common (COM), and Normally Open (NO) relay contacts for installing optional alarm input connections (see
Table 1-1 on page 1-4 for Alarm descriptions). When an alarm is not active, there is continuity between the NC and
COM connections; when an alarm is active, there is continuity between the NO and COM connections.
Note: The NO and COM alarm relay connections can be daisy-chained between HMS-318 List 3 shelves
for multi-shelf applications in the same equipment rack.
ALARMS
NC C NO
123
CRIT AUD
5
4
7
89
10 11 12
6
CRIT VIS
MAJ AUD
MAJ VIS
13 14 15
MIN AUD
MIN VIS
SYS ID
ACO
1
R
1
6
2
NO COM
1
6
FAN
0
GND
EXT
TEMP
16 17 18
19 20 21
23 24
22
25 26
Figure 1-4. Alarms Wire-Wrap Field (TB2)
Alarm Cutoff (ACO)
The Alarm Cutoff (ACO) function silences active audible alarms. Alarm cutoff can be achieved by pre ssing the ACO
button on the front panel of the Management Unit (for example, HMU-319) or by connecting the ACO pin 22 on the
HMS-318 List 3 shelf Alarms wire-wrap field (see Figure 1-4 on this page and Table 1-2) to ground through an
external NO push button switch. The ACO lead can be daisy-chained to other shelves for multi-shelf applications in
the same equipment rack.
1-6 LTPH-UM-1261-01
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