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Document:	VAX 6000: Installing the H7236-A Battery Backup Option
Order Number:	EK-60BBA-IN
Revision:	001
Pages:	41
Original Filename:

OCR Text

VAX 6000: Installing the H7236-A
Battery Backup Option

Order Number EK–60BBA–IN–001

This manual is intended for Digital customer service
engineers and self-maintenance customers installing
the H7236-A battery backup option.

digital equipment corporation
maynard, massachusetts

First Printing, December 1990
The information in this document is subject to change without notice and should not be
construed as a commitment by Digital Equipment Corporation.
Digital Equipment Corporation assumes no responsibility for any errors that may appear in
this document.
The software, if any, described in this document is furnished under a license and may be used
or copied only in accordance with the terms of such license. No responsibility is assumed
for the use or reliability of software or equipment that is not supplied by Digital Equipment
Corporation or its affiliated companies.
Copyright ©1990 by Digital Equipment Corporation.
All Rights Reserved.
Printed in U.S.A.

The following are trademarks of Digital Equipment Corporation:
DEMNA
DEC
DEC LANcontroller
DECnet
DECUS

PDP
ULTRIX
UNIBUS
VAX
VAXBI

VAXcluster
VAXELN
VMS
XMI

FCC NOTICE: The equipment described in this manual generates, uses, and may emit
radio frequency energy. The equipment has been type tested and found to comply with the
limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC Rules, which
are designed to provide reasonable protection against such radio frequency interference when
operated in a commercial environment. Operation of this equipment in a residential area
may cause interference, in which case the user at his own expense may be required to take
measures to correct the interference.

Contents
Preface

Chapter 1 Introduction
1.1
1.2

Battery Backup Unit Specifications . . . . . . . . . . . . . . . . . . . .
Battery Backup Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . .

1–2
1–5

Chapter 2 Battery Backup Unit Installation
2.1
2.2
2.3
2.4
2.4.1
2.4.2
2.4.3
2.5
2.5.1
2.5.2
2.5.3

Battery Backup Unit Installation Overview . . . . . . . . . . . . . .
Step 1, Remove the H405 AC Power Controller, if Necessary
Step 2, Install the H405-E/F AC Power Controller, if
Necessary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 3, Install the Guide Rail Plate Assembly . . . . . . . . . . . .
Move the ESD Strap, if Necessary . . . . . . . . . . . . . . . . . . .
Install the Guide Rail Plate Assembly . . . . . . . . . . . . . . . .
Install the Chassis Retainer Brackets . . . . . . . . . . . . . . . .
Step 4, Install the H7236-A Battery Backup Unit . . . . . . . . .
Install the Rear Clamping Assembly . . . . . . . . . . . . . . . . .
Install the Battery Backup Unit . . . . . . . . . . . . . . . . . . . .
Secure the Battery Backup Unit . . . . . . . . . . . . . . . . . . . .

2–2
2–4
2–6
2–8
2–8
2–10
2–12
2–14
2–14
2–16
2–18

Chapter 3 Battery Backup Unit Indicators and Switches
3.1
3.2

Battery Backup Unit Indicators . . . . . . . . . . . . . . . . . . . . . . .
Battery Backup Unit Switches . . . . . . . . . . . . . . . . . . . . . . . .

3–2
3–4

Index

iii

Figures
1–1
2–1
2–2
2–3
2–4
2–5
2–6
2–7
2–8
2–9
2–10
3–1
3–2

Battery Backup Unit Location . . . . . . . . . . . . . . . . . . . . . . . .
Overview of BBU Installation . . . . . . . . . . . . . . . . . . . . . . . .
H405 AC Power Controller Removal . . . . . . . . . . . . . . . . . . .
H405-E/F AC Power Controller Replacement . . . . . . . . . . . . .
Relocate the Front ESD Strap . . . . . . . . . . . . . . . . . . . . . . . .
Install the Guide Rail Plate Assembly . . . . . . . . . . . . . . . . . .
Shim Orientation and Chassis Retainer Brackets . . . . . . . . .
Rear Clamping Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chassis Retainer Assembly . . . . . . . . . . . . . . . . . . . . . . . . . .
H7236-A Battery Backup Unit Installation . . . . . . . . . . . . . .
BBU Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BBU Indicators (Rear View) . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal BBU Switches (Front View) . . . . . . . . . . . . . . . . . . .

1–2
2–2
2–4
2–6
2–8
2–10
2–12
2–14
2–15
2–16
2–18
3–2
3–4

Tables
1
2
3
1–1
1–2
2–1
3–1

VAX 6000 Series Documentation . . . . . . . . . . . . . . . . . . . . . .
VAX 6000 Model Level Documentation . . . . . . . . . . . . . . . . .
Associated Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H7236-A Battery Backup Unit Specifications . . . . . . . . . . . . .
Battery Backup Kit H7236-A . . . . . . . . . . . . . . . . . . . . . . . . .
H405-E/F Replacement Table . . . . . . . . . . . . . . . . . . . . . . . . .
H7236-A Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vi
vii
viii
1–3
1–5
2–3
3–3

Preface
Intended Audience
This manual is intended for Digital customer service engineers and selfmaintenance customers installing the H7236-A battery backup option.

Document Structure
This manual uses a structured documentation design. There are many
topics, organized into small sections for efficient reference. Each topic
begins with an abstract. You can quickly gain a comprehensive overview
by reading only the abstracts. Next is an illustration or example, which
also provides quick reference. Last in the structure is descriptive text.
This manual has three chapters, as follows:
•

Chapter 1, Introduction, gives an overview of the H7236-A battery
backup unit, including specifications.

•

Chapter 2, Battery Backup Unit Installation, gives instructions on
how to install the battery backup unit in the system cabinet.

•

Chapter 3, Battery Backup Unit Indicators and Switches,
describes the battery backup unit indicators and switches and their
functions.

Conventions Used in This Document
The icons shown below are used in illustrations for designating part
placement in VAX 6000 series systems. A shaded area in the icon shows
the location of the component or part being discussed.

FRONT

REAR

VAX 6000 Series Documents
There are two sets of documentation: manuals that apply to all VAX 6000
series systems and manuals that are specific to one VAX 6000 model.
Table 1 lists the manuals in the VAX 6000 series documentation set.

Table 1: VAX 6000 Series Documentation
Title

Order Number

Operation
VAX 6000 Series Owner’s Manual

EK–600EA–OM

VAX 6000 Series Vector Processor Owner’s Manual

EK–60VAA–OM

VAX 6000 Vector Processor Programmer’s Guide

EK–60VAA–PG

Service and Installation
VAX 6000 Platform Technical User’s Guide

EK–600EA–TM

VAX 6000 Series Installation Guide

EK–600EA–IN

VAX 6000 Installationsanleitung

EK–600GA–IN

VAX 6000 Guide d’installation

EK–600FA–IN

Table 1 (Cont.): VAX 6000 Series Documentation
Title

Order Number

Service and Installation
VAX 6000 Guia de instalacion

EK–600SA–IN

VAX 6000 Platform Service Manual

EK–600EA–MG

Options and Upgrades
VAX 6000 XMI Conversion Manual

EK–650EA–UP

VAX 6000: Installing MS65A Memories

EK–MS65A–UP

VAX 6000: Installing the H7236-A Battery Backup Option

EK–60BBA–IN

VAX 6000: Installing the FV64A Vector Option

EK–60VEA–IN

VAX 6000: Installing the VAXBI Option

EK–60BIA–IN

Manuals specific to models are listed in Table 2.

Table 2: VAX 6000 Model Level Documentation
Title

Order Number

Models 200/300/400
VAX 6000 Model 300 and 400 Service Manual

EK–624EA–MG

VAX 6000: Installing Model 200/300/400 Processors

EK–6234A–UP

Model 500
VAX 6000 Model 500 Mini-Reference

EK–650EA–HR

VAX 6000 Model 500 Service Manual

EK–650EA–MG

VAX 6000 Model 500 System Technical User’s Guide

EK–650EA–TM

VAX 6000: Installing Model 500 Processors

EK–KA65A–UP

vii

Associated Documents
Table 3 lists other documents that you may find useful.

Table 3: Associated Documents
Title

Order Number

System Hardware Options
VAXBI Expander Cabinet Installation Guide

EK–VBIEA–IN

VAXBI Options Handbook

EB–32255–46

System I/O Options
CIBCA User Guide

EK–CIBCA–UG

CIXCD Interface User Guide

EK–CIXCD–UG

DEC LANcontroller 200 Installation Guide

EK–DEBNI–IN

DEC LANcontroller 400 Installation Guide

EK–DEMNA–IN

InfoServer 100 Installation and Owners Guide

EK–DIS1K–IN

KDB50 Disk Controller User’s Guide

EK–KDB50–UG

KDM70 Controller User Guide

EK–KDM70–UG

RRD40 Disc Drive Owner’s Manual

EK–RRD40–OM

RA90/RA92 Disk Drive User Guide

EK–ORA90–UG

SA70 Enclosure User Guide

EK–SA70E–UG

Operating System Manuals
Guide to Maintaining a VMS System

AA–LA34A–TE

Guide to Setting Up a VMS System

AA–LA25A–TE

Introduction to VMS System Management

AA–LA24A–TE

ULTRIX–32 Guide to System Exercisers

AA–KS95B–TE

VMS Upgrade and Installation Supplement: VAX 6000 Series

AA–LB36C–TE

VMS Networking Manual

AA–LA48A–TE

VMS System Manager’s Manual

AA–LA00A–TE

VMS VAXcluster Manual

AA–LA27B–TE

viii

Table 3 (Cont.): Associated Documents
Title

Order Number

Peripherals
HSC Installation Manual

EK–HSCMN–IN

H4000 DIGITAL Ethernet Transceiver Installation Manual

EK–H4000–IN

Installing and Using the VT320 Video Terminal

EK–VT320–UG

RV20 Optical Disk Owner’s Manual

EK–ORV20–OM

SC008 Star Coupler User’s Guide

EK–SC008–UG

TA78 Magnetic Tape Drive User’s Guide

EK–OTA78–UG

TA90 Magnetic Tape Subsystem Owner’s Manual

EK–OTA90–OM

TK70 Streaming Tape Drive Owner’s Manual

EK–OTK70–OM

TU81/TA81 and TU/81 PLUS Subsystem User’s Guide

EK–TUA81–UG

VAX Manuals
VAX Architecture Reference Manual

EY–3459E–DP

VAX Systems Hardware Handbook — VAXBI Systems

EB–31692–46

VAX Vector Processing Handbook

EC–H0739–46

Chapter 1

Introduction
This chapter describes the H7236-A battery backup unit. Sections include:
•

Battery Backup Unit Specifications

•

Battery Backup Kit Contents

Introduction 1–1

1.1 Battery Backup Unit Specifications
The battery backup unit (BBU) is installed adjacent to the
H405 AC power controller. If the system has imbedded
storage in one slot, install the BBU next to the SA70.

Figure 1–1: Battery Backup Unit Location

REAR

REPLACE THE H405
AC POWER CONTROLLER,
IF NECESSARY

INSTALL BATTERY
BACKUP UNIT

msb-0380-90

1–2 VAX 6000: Installing the H7236-A Battery Backup Option

The H7236-A BBU is a new battery backup unit for the VAX 6000 series.
It can be installed in an XMI-2 VAX 6000 (cabinet number H9657-CA/CB)
or in a Model 200, 300, or 400 that has been upgraded to a Model 500
using the full power and packaging upgrade kit H9657-CU. If the H405 AC
power controller is not at the required revision (see Table 2-1), it must be
replaced.
NOTE: If an earlier model has been upgraded to a Model 500 using the
H9657-CX upgrade kit, battery backup is not supported.
The BBU will not provide backup power for an expander cabinet
configuration.
The H7236-A provides system ride-through capabilities for power losses of
up to one second. Momentary lapses in power, therefore, have no effect on
the system. For power losses greater than one second, the BBU provides
power for up to 10 minutes to the entire XMI side of the system. If power
does not return after one second, an orderly shutdown of the VAXBI side
is initiated. The caches are then flushed and memory is saved. If power is
returned within 10 minutes, the system performs a warm restart.
Table 1–1 lists the battery backup unit specifications.

Table 1–1: H7236-A Battery Backup Unit Specifications
Physical

cm (in)
Height

20.8 (8.2)

Width

26.7 (10.5)

Depth

63.5 (25.0)

Weight

45.5 kg (100 lbs)

Environmental
Operating temperature

10o to 40o C (50o to 104o F)

Operating humidity

10% to 90% relative humidity

Altitude

Non-operating

0 to 9.1 km (0 to 30,000 ft)

Operating

0 to 2.4 km (0 to 8000 ft)

Introduction 1–3

Table 1–1 (Cont.): H7236-A Battery Backup Unit Specifications
BBU Cooling System
Type

Air moving device

Air mover

Single fan, operates when BBU is supplying power

Air source

Ambient air

60 Hz

4 A (120 V)

50 Hz

2 A (240 V)

60 Hz

120 VRMS nominal

50 Hz

240 VRMS nominal

Electrical
AC current (max)

Input voltage

Output voltage

220 V DC to 360 V DC

Output energy

2.2 Kw for 2 seconds
1.0 Kw for up to 10 minutes

Output current

15 A DC max
5 A typical during 10 minute run

Battery life

5 years at

25o C

4 years at

30o C

2.3 years at

35o C

1.3 years at

40o C

1–4 VAX 6000: Installing the H7236-A Battery Backup Option

1.2 Battery Backup Kit Contents
To add battery backup to a VAX 6000 Model 500 you need
the H7236-A battery backup unit kit. Table 1–2 lists the
components in the BBU kit.
Be sure all items required for installing the BBU are present before starting
the installation procedure. Table 1–2 lists the H7236-A BBU kit contents.
WARNING: The H7236-A battery backup unit weighs 100 pounds. Use two
people to lift or move this unit.

Table 1–2: Battery Backup Kit H7236-A
Part Number

Quantity

Description

30-31264-01

Power system, standby uninterrupt

70-25686-01

Rail chassis assembly

70-25687-01

Bracket rail assembly

74-36464-01

Bar, insert nut

90-00039-26

Screw, Mach 10-32 FLT

90-06078-01

Screw, Mach 10-32 PAN

90-06664-00

Washer, flat SST

90-07906-00

Washer, helical split steel

74-36160-01

Block wedge

74-35857-02

Bracket, chassis retaining, bot

74-35857-01

Bracket, chassis retaining, top

74-35860-01

Bracket, chassis retainer, rear

90-06637-00

Washer, lock internal steel

12-24007-02

Screw, SHLD 10-32 CAP

12-24007-01

Screw, SHLD 10-32 CAP

12-21368-02

Screw, sems 10-32 PAN

Introduction 1–5

Table 1–2 (Cont.): Battery Backup Kit H7236-A
Part Number

Quantity

Description

90-06074-02

Screw, MACH 10-32 FLT

17-00442-27

Power cord 3 ft.

74-39395-01

Shim

90-07880-00

Cable tie

90-08264-00

Cable tie mount, adhesive backed

90-09228-10

Screw, sem 10-32 PAN

17-02975-01

Cable assy, 15 cond, molded, shielded

17-02485-01

Wire harn assy 04conn 16AWG 6pos U

90-07082-00

Clamp, cable, screw mtd. 5/16"

EK-60BBA-IN

VAX 6000: Installing the H7236-A Battery
Backup Option

1–6 VAX 6000: Installing the H7236-A Battery Backup Option

Chapter 2

Battery Backup Unit Installation
This chapter describes the installation of the H7236-A battery backup unit.
The H405 AC power controller must be replaced (Steps 1 and 2) if it is not
at the minimum revision level listed in Table 2-1. Sections include:
•

Battery Backup Unit Installation Overview

•

Step 1, Remove the H405 AC Power Controller, if Necessary

•

Step 2, Install the H405-E/F AC Power Controller, if Necessary

•

Step 3, Install the Guide Rail Plate Assembly
Move the ESD Strap, if Necessary
Install the Guide Rail Plate Assembly
Install the Chassis Retainer Brackets

•

Step 4, Install the H7236-A Battery Backup Unit
Install the Rear Clamping Assembly
Install the Battery Backup Unit
Secure the Battery Backup Unit

Battery Backup Unit Installation 2–1

2.1 Battery Backup Unit Installation Overview
The H7236-A battery backup unit can be installed in an
XMI-2 VAX 6000 or in a Model 200, 300, or 400 that has been
upgraded to a Model 500 (with the full power and packaging
upgrade kit H9657-CU).

Figure 2–1: Overview of BBU Installation

REMOVE THE H405
AC POWER CONTROLLER,
IF NECESSARY

INSTALL A NEW H405-E/F
AC POWER CONTROLLER,
IF NECESSARY

REAR

INSTALL THE
GUIDE RAIL
PLATE ASSEMBLY

INSTALL AND VERIFY
THE BATTERY
BACKUP UNIT

msb-0371-90

2–2 VAX 6000: Installing the H7236-A Battery Backup Option

If you are installing the BBU in an XMI-2 VAX 6000, go to Section 2.4.
If you are installing the BBU in a system that has undergone a full power
and packaging upgrade, the following should have been done:
1. The H7231-N BBU should have been removed
2. The H7206-A power and logic unit should have been replaced by an
H7206-B power and logic unit
These two hardware changes are both needed to install the H7236-A BBU
in a full power and packaging upgrade. If for some reason these two steps
have not been completed, complete them now. See the VAX 6000 XMI
Conversion Manual, EK–650EA–UP.
Next, you will examine the revision level of the H405 AC power controller,
and upgrade if necessary.

Table 2–1: H405-E/F Replacement Table
Unit

Minimum
Revision

Replacement
Information

H405-E, 208V 60 Hz

Rev F07

Replace if at revision A, B, C,
D, or E

H405-F, 380/416V 50 Hz

Rev H07

Replace if at revision A, B, C,
D, E, F, or G

Battery Backup Unit Installation 2–3

2.2 Step 1, Remove the H405 AC Power Controller,
if Necessary
Remove the H405 AC power controller using a large Phillips
screwdriver. The assembly has six captive screws and seven
cables.
NOTE: Remove the H405-E only if it is revision A through E. Remove the
H405-F only if it is revision A through G. Other revisions need NOT be
removed. The revision level is printed on the AC power controller unit.

Figure 2–2: H405 AC Power Controller Removal

FRONT
VIEW

REAR
VIEW

REMOVE THE H405
AC POWER CONTROLLER,
IF NECESSARY

5
3

2–4 VAX 6000: Installing the H7236-A Battery Backup Option

msb-0389-90

1. Perform an orderly shutdown of the system.
•

Turn the upper key switch on the front control panel to the Off (0)
position.

•

Pull the circuit breaker on the H405 AC power controller to the Off
position.

•

Unplug the system power cord.
WARNING: High voltages are present in the H7206-B power and
logic unit. Before performing the following steps, wait 2 minutes
after power has been removed from the system before working on the
system.

2. Working from the front of the cabinet, disconnect the 17-0150101 AC input cable from J2 by twisting the black connector ring
counterclockwise. See 2 in Figure 2–2.
3. Disconnect the 17-01549-01 DEC power bus cable from J1. See 3 .
4. You should have removed the 17-00365-03 cable from J5. If a power
cord is attached here, remove it now. See 4 .
5. Disconnect the 17-01844-01 temperature sensor cable from J9. See 5 .
6. Disconnect the 17-01833-01 fail safe enable cable from J6 and J7 and
set aside to discard. See 6 .
7. Working from the rear of the cabinet, use a large Phillips screwdriver
to remove the six screws that hold the AC power controller in place.
See 7 .
8. Pull the AC power controller toward you and remove. Put the unit
aside. After you have installed the new H405, put the old H405 in the
shipping box for the H405 and return it to the Digital Field Service
Defective Returns Stockroom for upgrade.
WARNING: The H405 AC power controller is heavy. Exercise caution
when lifting and moving this unit.

Battery Backup Unit Installation 2–5

2.3 Step 2, Install the H405-E/F AC Power
Controller, if Necessary
Working from the rear of the cabinet, install the new
H405-E/F AC power controller. This unit provides switching
capability for the battery backup unit.

Figure 2–3: H405-E/F AC Power Controller Replacement

2
FRONT
VIEW

REAR
VIEW

INSTALL A NEW H405-E/F
AC POWER CONTROLLER,
IF NECESSARY

4
7

2–6 VAX 6000: Installing the H7236-A Battery Backup Option

msb-0390-90

WARNING: The H405 AC power controller is heavy. Exercise caution when
lifting and moving this unit.
1. Remove the 17-01833-01 cable from system completely.
2. Place the new H405 AC power controller into the designated space in
the lower righthand rear corner of the cabinet.
3. Using a large Phillips screwdriver, replace the six screws that hold the
AC power controller in place. See 3 in Figure 2–3.
4. Working from the front of the cabinet, attach one connector of the
17-02759-01 fail safe enable cable at J6 and the other connector at
J1. See 4 .
5. Connect the 17-01844-01 temperature sensor cable at J9. See 5 .
6. Connect the 17-01501-01 AC input cable to J2 by inserting the cable
and twisting the black connector ring clockwise. If the system has a 50
Hz transformer, connect the 17-01815-01 cable to J2. See 6 .
7. Plug the connector from the 17-02521-01 cable into J7 on the H405.
See 7 .
NOTE: Route the 17-01844-01 and 17-02759-01 cables away from the
transformer (50 Hz systems only).

Battery Backup Unit Installation 2–7

2.4 Step 3, Install the Guide Rail Plate Assembly
The BBU is attached to the guide rail plate assembly.
Relocate the ESD strap, if necessary, before installing the
guide rail plate assembly.

2.4.1 Move the ESD Strap, if Necessary
The electrostatic discharge (ESD) strap must be attached to
the middle hole on the transformer shield plate. If necessary,
remove it from the top hole and relocate it to the middle
hole.

Figure 2–4: Relocate the Front ESD Strap

3
TOP ESD STRAP
MOUNTING HOLE

INSTALL THE
GUIDE RAIL
PLATE ASSEMBLY

ESD
PACKET

MIDDLE ESD STRAP
MOUNTING HOLE

CABINET
FRONT

2–8 VAX 6000: Installing the H7236-A Battery Backup Option

msb-0697A-90

The ESD ground strap must be attached to the middle hole on the
transformer shield plate. If it is attached to the top hole, use the following
procedure to disconnect and reattach the ESD strap:
1. Working at the front of the cabinet, locate the front ESD packet (see
Figure 2–4). The packet is attached to a sheet metal transformer shield
plate located left of the drive cavity. The packet contains the ESD
ground strap, which is attached to the transformer shield plate in the
top right corner.
2. Move the front ESD ground strap from the top hole to the middle hole
on the transformer shield plate, as shown in Figure 2–4. Remove the
screw located below the ESD mounting screw and discard it and the
top screw.
If the system does not have an in-cabinet storage device, install the BBU
into the left position, viewed from the front. If the system contains an
SA70, install the BBU in the remaining space.

Battery Backup Unit Installation 2–9

2.4.2 Install the Guide Rail Plate Assembly
The guide rail plate assembly consists of the rail chassis
assembly, the bracket rail assembly, the insert nut bar, and
four mounting screws.

Figure 2–5: Install the Guide Rail Plate Assembly

3
3

FRONT CABINET
VERTICAL UPRIGHT

INSTALL THE
GUIDE RAIL
PLATE ASSEMBLY

1 SCREW (4)

90-00039-26
TOP FRONT
STANDOFF

SCREW
12-24007-02

WASHER
90-06637-00
BOTTOM FRONT
STANDOFF
GUIDE RAIL
PLATE ASSEMBLY
BRACKET RAIL
ASSEMBLY

SCREW (3)
12-24007-02

7 WASHER (3)

REAR CABINET
VERTICAL UPRIGHT

90-06637-00

2–10 VAX 6000: Installing the H7236-A Battery Backup Option

msb-0688A-90

This description and illustrations assume the BBU is being installed next
to the H405 AC power controller. To install the guide rail plate assembly:
1. Attach the bracket rail assembly (70-25687-01) to the rail chassis
assembly (70-25686-01) using four screws (90-00039-26) (see 1 ) that go
through to the insert nut bar (74-36464-01). Do not tighten the screws
yet.
2. Slide the guide rail plate assembly into the cabinet next to the AC power
controller. The guide rail plate assembly mounts from the inside of the
cabinet uprights. See Figure 2–5.
NOTE: The guide rail plate assembly is marked with an up arrow
for proper installation. When the BBU is installed next to the power
controller, the arrow on the rail sheet metal must point up. The bracket
rail assembly is at the rear of the cabinet.
3. Count four holes up from the bottom of the cabinet upright. See 3 .
NOTE: All references to holes refer to the cabinet upright mounting
holes. Always start counting from the bottom of the cabinet upright.
4. Insert the bottom rear standoff of the guide rail plate assembly through
hole 4.
5. Insert the top rear standoff of the guide rail plate assembly through hole
15. Standoffs through these holes hold the guide rail plate assembly in
place.
6. Install washer (90-06637-00) and shoulder screw (12-24007-02) into the
front center hole of the guide rail plate assembly and through hole 9 of
the cabinet upright. See 6 .
7. At the rear of the cabinet, install three washers (90-06637-00) and three
shoulder screws (12-24007-02) (see 7 ) into the following rear holes of
the guide rail plate assembly:
•

Hole 3 (hole below standoff)

•

Hole 9

•

Hole 16

This secures the guide rail plate assembly to the cabinet.

Battery Backup Unit Installation 2–11

2.4.3 Install the Chassis Retainer Brackets
After you have installed the guide rail plate assembly, install
the shims and chassis retainer brackets.

Figure 2–6: Shim Orientation and Chassis Retainer Brackets
SHIM

WASHER

3
STANDOFF,
CABINET
VERTICAL
UPRIGHT

LONG
SHOULDER
SCREW

INSTALL THE
GUIDE RAIL
PLATE ASSEMBLY

FRONT CHASSIS
RETAINING BRACKET

GUIDE RAIL
PLATE ASSEMBLY
msb-0693A-90

2–12 VAX 6000: Installing the H7236-A Battery Backup Option

To install the shims and chassis retainer brackets:
1. At the front of the cabinet, install the top shim (74-39395-01) over the
top front standoff of the guide rail plate assembly (hole 15). Place the
bottom hole of the shim over the top front standoff. See Figure 2–6.
2. Install the bottom shim (74-39395-01) over the bottom front standoff of
the guide rail plate assembly (hole 4). Place the top hole of the shim
over the bottom front standoff.
3. Install the top front chassis retaining bracket (74-35857-01) over the
shim.
4. Install the washer (90-06637-00) and shoulder screw (12-24007-01)
through the top hole of the top chassis retaining bracket and into the
middle hole of the shim (hole 16 of the cabinet upright). Torque the
shoulder screw to 30 inch-pounds.
5. Install the bottom front chassis retaining bracket (74-35857-02) over
the bottom shim.
6. Install the washer (90-06637-00) and shoulder screw (12-24007-01)
through the bottom hole of the chassis retaining bracket and into the
middle hole of the shim (hole 3 of the cabinet upright). Torque the
shoulder screw to 30 inch-pounds.
7. At the rear of the cabinet, torque the three screws on the rail-mounting
assembly and the four bracket rail assembly screws (90-00039-26) to 30
inch-pounds.

Battery Backup Unit Installation 2–13

2.5 Step 4, Install the H7236-A Battery Backup Unit
2.5.1 Install the Rear Clamping Assembly
Install the rear clamping assembly, which stops the BBU
when the BBU is slid into position.

Figure 2–7: Rear Clamping Assembly

INSTALL THE BATTERY
BACKUP UNIT

CHASSIS
RETAINING BRACKET
WHITE NYLON
BLOCK WEDGE

HOLE 17

RAIL CHASSIS
ASSEMBLY
FLAT WASHER
90-06664-00
HELICAL WASHER
90-07906-00

PHILLIPS SCREW
90-06078-01

CABINET REAR
VERTICAL UPRIGHT

2–14 VAX 6000: Installing the H7236-A Battery Backup Option

msb-0696A-90

Install the rear clamping assembly as follows:
1. Insert the following parts, in order, through the retainer chassis bracket
and into hole 17 of the cabinet upright:
•

White nylon wedge block (74-36160-01)

•

Flat washer (90-06664-00)

•

Helical washer (90-07906-00)

•

Pan-head Phillips screw (90-06078-01)

2. Install the bottom chassis retainer (74-35858-01) on the BBU by
inserting two Phillips screws (90-09228-10) through the chassis retainer
and into the top left front BBU guide slot. See Figure 2–8. Repeat for
the top chassis retainer.

Figure 2–8: Chassis Retainer Assembly

INSTALL THE BATTERY
BACKUP UNIT

msb-0722D-90

Battery Backup Unit Installation 2–15

2.5.2 Install the Battery Backup Unit
WARNING: The battery backup unit is heavy and requires two people to
handle it.

Figure 2–9: H7236-A Battery Backup Unit Installation

INSTALL THE BATTERY
BACKUP UNIT

1
1
2

2–16 VAX 6000: Installing the H7236-A Battery Backup Option

msb-0722C-90

1. To simplify handling the new BBU, remove the battery pack (which
accounts for more than half the weight) by first removing the four
Phillips screws holding the front panel of the BBU. See 1 in Figure 2–9.
2. Lift the front panel away from the BBU and disconnect the red/black
power pack cable (see 2 ) from the battery pack and set the front panel
on top of the BBU enclosure.
3. You are now ready to remove the battery pack from the BBU. See 3 .
Exercise care, as the battery pack is heavy. Reattach the front panel
temporarily after removing the battery pack.
4. Working from the front of the cabinet, place the BBU guide slot (see
4 ) on the guide rail plate assembly and guide the BBU into the system
cabinet (next to the H405 AC power controller) with the cooling fan end
toward the front of the system cabinet. Have one person push from the
front and the other pull from the rear.
5. Working from the front, reverse the steps in Step 1 to replace the BBU’s
battery pack and front panel. When reconnecting the red/black power
pack cable, be sure to support the bottom of the receptacle.
6. Working from the rear, connect the black AC power cord (17-00442-27)
from the BBU to the H405 power controller (FL3). Connect the blue and
brown power cable (17-02485-01) from the DC connector and the white
15-pin logic cable (17-02975-01) on the BBU to the H7206-B power and
logic unit. See 6 , Figure 2-10 in Section 2.5.3.
7. Install the connector retaining bracket (74-39125-01) to the rear of the
BBU using two Phillips screws (90-09228-01). Place the bracket over
the brown and blue cable (17-02485-01) with the round hole on top and
the slotted mounting hole on the bottom.
8. Set the voltage select switch to the proper voltage. See Chapter 3.

NOTE: The BBU fan is turned on only when the BBU is supplying power
to the system.

Battery Backup Unit Installation 2–17

2.5.3 Secure the Battery Backup Unit
Once you have installed the battery backup unit, secure the
BBU.

Figure 2–10: BBU Cabling
6

REAR

FL3

d i g i t a l

ON
AC

H7236-A
SN __________

+
DC OUTPUT
LEVEL "0"
-

L1
L2
L3
L4
L5

115

OFF

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2–18 VAX 6000: Installing the H7236-A Battery Backup Option

Use the following procedure to secure the BBU:
1. Slide the rear retainer chassis bracket (74-35860-01) into the BBU
chassis, as shown in Figure 2–7.
2. Tighten the pan-head screw to secure the rear of the enclosure to the
cabinet upright.
3. Repeat these steps for the bottom rear clamping assembly, installing
the assembly through hole 2 of the cabinet upright.
4. Secure the BBU to the rail by installing #10-32 x 5/8 inch flathead
Phillips screws (90-06074-02) through the top and bottom chassis
retainers and into the top and bottom chassis retainer brackets, as
shown in Figure 2–8. Tighten the screws.
5. Install the #10-32 x 5/8 inch pan-head sems screws (12-21368-02) into
holes 2 and 17, through the top and bottom chassis retainers and into
the guide rail plate assembly. Tighten the screws. See Figure 2–8.
6. Working at the rear of the cabinet, tighten the screws in the two rear
retainer chassis brackets.
7. Remove the pan head screw installed in hole number 2 and place cable
clamps on the AC power cord and on the brown and blue cable. See 7 ,
Figure 2-10. Replace the pan head screw after passing it through the
mounting holes in the clamps.
8. Attach the adhesive-backed cable tie (90-08264-00) to the lower right
rear corner of the BBU (see 8 ) and attach the signal bus cable
(17-02975-01) to it using the cable tiewrap (90-07880-00).
9. Remove the pan head screw in hole number 17 and place a cable clamp
(90-07082-00) on the blue and brown cable (17-02485-01) and another
on the signal bus cable (17-02975-01). See 9 . Replace the screw after
passing it through the mounting holes in the two clamps.
Refer to the VAX 6000 Series Owner’s Manual for system power-up
instructions. Chapter 3 discusses the BBU self-test, indicators, and
switches.

Battery Backup Unit Installation 2–19

Chapter 3

Battery Backup Unit
Indicators and Switches
This chapter discusses the battery backup unit’s indicators and switches.
Sections include:
•

Battery Backup Unit Indicators

•

Battery Backup Unit Switches

Battery Backup Unit Indicators and Switches 3–1

3.1 Battery Backup Unit Indicators
The H7236-A battery backup unit has five LED indicators on
the lower righthand corner of the front of the unit.

Figure 3–1: BBU Indicators (Rear View)

REAR

d i g i t a l

ON
AC

H7236-A
SN __________

L1
L2
L3
L4
L5

115

OFF

+
DC OUTPUT
LEVEL "0"
-

msb-0729-90

3–2 VAX 6000: Installing the H7236-A Battery Backup Option

Table 3–1 describes the five LEDs of the H7236-A. Refer to Figure 3–1 for
LED numbering.

Table 3–1: H7236-A Indicators
LED

Color

On indicates:

Green

Batteries supplying power.

Green

BBU CHARGE. On steady when BBU charged to at least 98%. Blinking at 1 Hz when charging but less than 98% charged. Blinking at 10 Hz when BBU needs service.

Red

OVER TEMP. Blinking when the external ambient temperature has exceeded 40 degrees C or the BBU fan has failed while the BBU is supplying power.

Red

ELECTRONIC FAIL. On steady when BBU detects an error related to its electronics.

Red

BATTERY SERVICE. Blinking at 1 Hz when battery has less than 40%
original capacity or when BBU has failed. On steady when BBU has detected a disconected battery or an open front cover interlock switch on self-test.

LEDs 3 and 5 are latched on to indicate BBU faults. You reset these LEDs
by pressing the Alarm Reset switch inside the H7236-A (see Figure 3–2).
When the system is powered up, the BBU automatically initiates self-test.
During self-test, which is completed within 60 seconds, the five LEDs cycle
in a sequential pattern.

Battery Backup Unit Indicators and Switches 3–3

3.2 Battery Backup Unit Switches
The H7236-A battery backup unit has six switches: two
external switches are visible at the rear of the unit, and
four internal switches are visible when the fan housing is
removed from the front of the unit.

Figure 3–2: Internal BBU Switches (Front View)

<enable

LIFE

defeat>

FRONT

msb-0729D-90

3–4 VAX 6000: Installing the H7236-A Battery Backup Option

The two external switches are the voltage selection switch and the AC power
switch, visible at the cabinet rear (see Figure 3–1).
NOTE: Switch the AC power switch (toggle switch) Off when you are
removing or installing the BBU option.
Before power-up, set the voltage selection switch to the proper
value for the system (115V at 60 Hz or 230V at 50 Hz).
The four internal switches (see Figure 3–2), which are visible at the front
of the unit when the fan housing is removed, are:
•

Fan Panel Interlock Switch — Shuts down the BBU when the fan
housing cover is removed. See 1 .

•

Alarm Reset Switch (pushbutton switch) — Resets either of the
two latched alarm conditions (OVERTEMP, L3, and BATT SERVICE,
L5). See 2 .

•

Battery Life Switch (toggle switch) — Activates the battery life
enhancement mode, which provides a longer battery life in return for
a reduction in the available reserve time at the start of the operation.
The BBU normally runs in battery life enable mode. See 3 .

•

New Battery Reset Switch (pushbutton switch) — Resets the
battery aging information in the EEPROM. This switch is activated
only when the battery pack is replaced with a new one. The battery life
switch must be in the Enable position for this switch to function. See
4.

For BBU service information, refer to the VAX 6000 Platform Service
Manual.

Battery Backup Unit Indicators and Switches 3–5

Index
17-00365-03
removal, 2–5
17-00442-27
connection, 2–17
17-01501-01
removal, 2–5
replacement, 2–7
17-01549-01
removal, 2–5
17-01815-01
removal, 2–5
replacement, 2–7
17-01833-01
removal, 2–5, 2–7
17-01844-01
removal, 2–5
replacement, 2–7
17-02485-01
connection, 2–17
17-02759-01
replacement, 2–7
17-02975-01
connection, 2–17

AC input cable
removal, 2–5
replacement, 2–7
AC power controller
See H405 AC power controller,
2–4
AC power cord
connection, 2–17
AC power switch, 3–5
Alarm reset switch, 3–3, 3–5
Altitude, 1–4

B
Battery
life enable switch, 3–5
pack removal, 2–17
power pack cable, 2–17
reset switch, 3–5
Battery backup
upgrade, 2–19
Battery backup unit
cabling, 2–18
dimensions, 1–4
environmental characteristics,
1–4
faults, 3–3
guide slot, 2–15, 2–17
indicators, 3–2
installation, 2–14 to 2–19
installation kit contents, 1–5
installation overview, 2–2 to 2–3
location, 1–1
physical description, 1–1 to 1–4
self-test, 3–3
specifications, 1–2
switches, 3–2
Battery life, 1–4, 3–5
BBU fan, 1–4, 2–17

C
Chassis retainer
assembly, 2–15
bracket installation, 2–12
Cooling system
characteristics, 1–4

Index–1

Humidity, 1–4

DC power cable
connection, 2–17
DEC power bus cable
removal, 2–5

E
EEPROM reset, 3–5
Electrical specifications, 1–4
ESD ground strap relocation, 2–8,
2–9
Expander cabinet, 1–3
External switches, 3–4

F
Fail safe enable cable
removal, 2–5, 2–7
replacement, 2–7
routing, 2–7
Fan housing, 3–4
Fan panel interlock switch, 3–5
Faults, 3–3

G
Guide rail plate assembly
installation, 2–10

H
H405 AC power controller, 1–2, 2–4
to 2–7
installation, 2–6 to 2–7
removal, 2–4 to 2–5
return, 2–5
revision level, 2–4, 2–6
H7206-B power and logic unit, 2–17
H7231
cable from J5, 2–5
H7236-A
BBU kit contents, 1–6
installation, 2–2 to 2–3, 2–14 to
2–19
upgrade, 2–19

Index–2

Indicators, 3–2
Input voltage, 1–4
Internal switches, 3–4

L
Latched LEDs, 3–3
LED indicators, 3–2
Logic signal cable
connection, 2–17

R
Rear clamping assembly, 2–14
Revision level, H405, 2–3

S
Self-test, 3–3
Shim installation, 2–12
Switches, 3–2

T
Temperature
maximum, 1–4
operating, 1–4
Temperature sensor cable
removal, 2–5
replacement, 2–7

V
Voltage selection switch, 2–17, 3–5

W
Weight, 1–4