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EK-VXFTA-SP-A01

June 1993

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Document:	VAXft Systems Model 810 Site Preparation Guide
Order Number:	EK-VXFTA-SP
Revision:	A01
Pages:	32
Original Filename:

OCR Text

VAXft Systems
Model 810
Site Preparation Information
Order Number: EK-VXFTA-SP.A01

June 1993

This manual is intended for use by Digital Services and other personnel
responsible for planning and preparing VAXft Model 810 system sites.

Digital Equipment Corporation

June 1993
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.
No responsibility is assumed for the use or reliability of software on equipment that is not supplied
by Digital Equipment Corporation or its affiliated companies.
Restricted Rights: Use, duplication, or disclosure by the U.S. Government is subject to restrictions
as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software
clause at DFARS 252.227-7013.
© Digital Equipment Corporation June 1993.
All Rights Reserved.
Printed in Canada
The following are trademarks of Digital Equipment Corporation: CompacTape, OpenVMS, ThinWire,
TK, UETP, VAX, VAXft, VMS, and the DIGITAL logo.
FCC NOTICE: This equipment generates, uses, and may emit radio frequency energy. It has been
tested and found to comply with the limits for a Class A computing device pursuant to Subpart J
of Part 15 of FCC rules of operation in a commercial environment. This equipment, when operated
in a residential area, may cause interference to radio/TV communications. In such event the user
(owner), at his own expense, may be required to take corrective measures.
This document is available on CDROM.

Documentation Map

Hardware
Information
(VAXft Systems)

Overview
Information
(VAXft Systems)

Software Product
Description

Models
110, 410, 610, 612

Model
810

Configuration
Guide

Configuring
the Model 810

Operating System
(VMS)

Cover
Letter

Software
Information
(VAXft System Services)

Before You
Install Letter

Release Notes
Site Prep and
Installation Guide

Release Notes

Installation
Information

Owner’s Manual
Operating
Information

VMS Upgrade and
Installation Manual

Service
*Information

VMS Upgrade and
Installation Supplement:
VAXft Systems

Wide Area
* VAXNetwork
Device Drivers

*Maintenance
Guide

*Site Prep
Information

= Book

= Tape

Using Factory−Installed
Software with
VAXft Systems

Manager’s
Guide

Online Help

VMS Volume
Shadowing Manual

= Bookreader
Reference
Manual

= Online

= Letter

= Order Separately

MR−6231−RA

Contents
1 System and Site Planning Overview
1.1
1.2

Model 810 System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Building Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1
1–4

2 System Site Preparation
2.1
2.1.1
2.1.2
2.1.3
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.3
2.3.1
2.3.2
2.3.3

Site Planning Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fire and Safety Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Computer Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparing for Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Facility Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Space Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Raised Floor Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature and Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Filtration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shock and Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1
2–1
2–1
2–2
2–2
2–2
2–3
2–5
2–6
2–6
2–6
2–8
2–8

3 Power and Safety Requirements
3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.2

Power Distribution and Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Power Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1
3–1
3–5
3–5
3–6
3–12

Entry System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expanded System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 810 Cabinet Space Requirements . . . . . . . . . . . . . . . . . . . . . . .
CPU Cabinet Airflow Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Psychrometric Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Single Cabinet AC Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . .
Dual Cabinet AC Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Power Distribution with Uninterruptible Power Supplies . . . . . . .

1–2
1–3
2–4
2–5
2–7
3–2
3–3
3–4

Figures
1–1
1–2
2–1
2–2
2–3
3–1
3–2
3–3

Tables
1–1
2–1
2–2
2–3
3–1
3–2
3–3
3–4
3–5
3–6
3–7
3–8

System Building Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 810 Cabinet Dimensions and Weights . . . . . . . . . . . . . . . . . . . .
Temperature and Humidity Specifications . . . . . . . . . . . . . . . . . . . . . .
Model 810 Shock and Vibration Specifications . . . . . . . . . . . . . . . . . . .
AC Power Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entry System and Single Cabinet Package 120 Vac Power . . . . . . . . .
Entry System and Single Cabinet Package 240 Vac Power . . . . . . . . .
Dual Cabinet/Advantage Server 120 Vac Power . . . . . . . . . . . . . . . . . .
Dual Cabinet/Advantage Server 240 Vac Power . . . . . . . . . . . . . . . . . .
Dual Cabinet Package/Advantage Server 120 Vac Power . . . . . . . . . . .
Dual Cabinet Package/Advantage Server 240 Vac Power . . . . . . . . . . .

1–4
2–3
2–6
2–8
3–5
3–6
3–6
3–7
3–8
3–9
3–10
3–11

1
System and Site Planning Overview
This chapter includes:
•

Model 810 system overview

•

System building blocks

The Site Environmental Preparation Guide (EK-CSEPG-MA) provides further
information on site planning and computer room environments.

1.1 Model 810 System Overview
The Model 810 system uses fault-tolerant techniques for error analysis and
hardware redundancy to provide a continuously operating computer environment.
It has redundant modules and error checking mechanisms that provide the
following functions:
•

Error capture for detecting and reporting an error.

•

Error recovery for removing the effects of an error.

•

Faulted device restoration for returning the system to full redundancy.

The Model 810 is available in two cabinet configurations: entry and expanded
systems. Figure 1–1 shows the entry system configuration of a standalone CPU
cabinet which includes two duplicated zones.
Figure 1–2 shows the expanded configuration with CPU and expansion cabinets.
The expansion cabinet may contain disk storage arrays, tape drives, tape loader,
and a power system.

System and Site Planning Overview 1–1

Figure 1–1 Entry System Configuration

tem

X ft

Sys

MR-0405-92DG

1–2 System and Site Planning Overview

Figure 1–2 Expanded System Configuration

tem

X ft

Sys

MR-0408-92DG

System and Site Planning Overview 1–3

1.2 System Building Blocks
Table 1–1 specifies the system building blocks (SBBs) for each system
configuration and the related components.
Table 1–1 System Building Blocks
SBB Number

System Type

Input Power

System Components

56CAA-BA

Entry System

120/240 Vac

CPU cabinet with 2 zones
including: 2 CPUs, 1 I/O processor,
2 DSSI interfaces, 1 Ethernet
interface, 32 MB memory
- OpenVMS software
- Volume Shadowing for OpenVMS
- VAXft System Services

SV-56CAB-BA

Single Cabinet
Package

120/240 Vac

CPU cabinet with 2 zones
including: 2 CPUs, 1 I/O processor,
2 DSSI interfaces, 1 Ethernet
interface, 1 RF35 drive, in-zone
disk cabinet kit, 64 MB memory
- OpenVMS software
- Volume Shadowing for OpenVMS
- VAXft System Services

SV-56CBB-BE

Dual Cabinet
Package

120/240 Vac

CPU cabinet with 2 zones
including: 2 CPUs, 1 I/O processor,
2 DSSI interfaces, 2 Ethernet
interfaces, 64 MB memory
Expansion cabinet including:
2 SF35-BK drives, 2 power
distribution boxes
- OpenVMS software
- Volume Shadowing for OpenVMS
- VAXft System Services

SV-56CBB-BJ

Dual Cabinet
Package

120/240 Vac

DV-56CBB-BE

Dual Cabinet
Advantage Server

120/240 Vac

CPU cabinet with 2 zones
including: 2 CPUs, 1 I/O processor,
2 DSSI interfaces, 2 Ethernet
interfaces, 64 MB memory
(continued on next page)

1–4 System and Site Planning Overview

Table 1–1 (Cont.) System Building Blocks
SBB Number

System Type

Input Power

System Components
Expansion cabinet including:
2 SF35-BK drives, 2 power
distribution boxes, 1 TF85C-BA
tape drive
- OpenVMS software
- Volume Shadowing for OpenVMS
- VAXft System Services
- NAS400 software

DV-56CBB-BJ

Dual Cabinet
Advantage Server

120/240 Vac

CPU cabinet with 2 zones
including: 2 CPUs, 1 I/O processor,
2 DSSI interfaces, 2 Ethernet
interfaces, 64 MB memory
Expansion cabinet including:
2 SF35-BK drives, 2 power
distribution boxes, 1 TF85C-BA
tape drive
- OpenVMS software
- Volume Shadowing for OpenVMS
- VAXft System Services
- NAS400 software

System and Site Planning Overview 1–5

2
System Site Preparation
This chapter includes:
•

Site planning guidelines

•

Preparing for delivery

•

Environmental limits

2.1 Site Planning Guidelines
When planning a computer facility, the recommended guidelines are to:
1. Identify space, environmental, and power requirements.
2. Determine whether the computer facility meets the requirements and list
necessary enhancements and changes.
3. The following steps are recommended:
a. Prepare a layout diagram of the installation area. Table 2–1 lists the
system cabinet dimensions and weights.
b. Determine the air quality and cooling capabilities of the installation area.
Table 2–2 lists the system temperature and humidity requirements.
c.

Determine the required number, type, and location of ac power receptacles
and circuit breakers. Section 3.1.4 lists the system power requirements.

2.1.1 Fire and Safety Codes
The computer facility should conform to local fire and safety codes. The power
distribution panel and master circuit breaker must be easily accessible.
For further information on fire and safety codes and practices, refer to the
following U.S. National Fire Protection Association publications or to equivalent
associations and codes:
•

Standard for the Protection of Electronic Computer/Data Processing
Equipment (NFPA 75)

•

National Electrical Code (NFPA 70)

2.1.2 Computer Security
Computer security can be important even where confidential work is not common
practice. It is advisable to provide a separate computer room or facility, or to
improve or extend the existing building security practices.
The goal is to provide protection for the computer area against potential
damage to the equipment or its programs through carelessness, vandalism,
or unauthorized operation.

System Site Preparation 2–1

2.1.3 Data Protection
Consider the security of the system media, programs, and databases. Personnel,
medical, financial, research, and other sensitive information should be
safeguarded from unauthorized access, tampering, or disclosure.
Special safeguards should be considered for protecting vital data such as business
records or information that is expensive or difficult to duplicate. Important data
should be copied onto removable media on a regular basis and stored away from
the computer area, preferably in a fireproof storage vault.

2.2 Preparing for Delivery
In advance, review the route over which the equipment will be moved after
delivery. Factors to consider are availability of an elevator, width and location
of doors and aisles along the route, hallway restrictions (bends, slopes, or
obstructions), and floor surfaces/protection.
If problems require the equipment to be unpacked and removed from the skids,
remember that a cabinet is too heavy to be handled by one person.
Doors along the route should allow passage for the equipment and be without
saddles or sills to allow movement of dollies.
To protect against marring of the floor surface, a suitable material such as 0.64
cm (0.25 in) plywood should be used to cover the floor along the route.

2.2.1 Facility Layout
In advance, prepare the layout of the computer facility to determine the area
required for the complete system configuration plus airflow and service access
areas. Allow enough operating and maintenance access space for the terminals
and printers you plan to connect to the system. Also consider human factors in
the layout.
Other important factors to consider:
•

System access requirements—A minimum of 1000 mm (39.4 in) is required
in the front and rear of the cabinets for service and operating access.

•

Cooling airflow access—A minimum of 61 cm (24 in) is required above the
cabinets for cooling exhaust airflow.
Note
If the system is to be installed in an enclosed space, additional air cooling
equipment may be required.

2–2 System Site Preparation

•

Floor requirements—The system must rest on a firm surface to allow full
exhaust from the bottom. Soft surfaces, such as shag or deep-pile carpet,
must be avoided unless a firm surface (such as floor tile) is installed on top
of the carpet. The floor should be made of a material that minimizes static
electricity, which can cause system failures or media damage.

•

Storage area—A safe storage area should be provided for magnetic computer
media, supplies, documents, spare parts, and maintenance tools.
Caution
Do not place food, beverages, offices supplies, or other materials on top of
the cabinets. Areas around the system should not be used for storage.

2.2.2 Space Requirements
Table 2–1 specifies the CPU and expansion cabinet dimensions and weights.
Figure 2–1 specifies the dimensions and clearance requirements for the CPU and
expansion cabinets.
Table 2–1 Model 810 Cabinet Dimensions and Weights
Specification

Value

Skid and packaging removed:
Height

1702 mm (67 in)

Width

610 mm (24 in)

Depth

876 mm (34.5 in)

Weight (maximum)

342 kg (755 lb)

Point load

86 kg (189 lb)

Skid and packaging intact:
Height

2083 mm (82 in)

Width

914 mm (36 in)

Depth

1194 mm (47 in)

Weight (maximum)

390 kg (860 lb)

System Site Preparation 2–3

Figure 2–1 Model 810 Cabinet Space Requirements

Front View
CPU
Cabinet

Expansion
Cabinet

Top Clearance
610 mm
(24 in)

Height
1702 mm
(67 in)

Width
610 mm
(24 in)

Top View
CPU
Cabinet

Expansion
Cabinet

Rear Clearance
1000 mm
(39.4 in)

Depth
876 mm
(34.5 in)

Front Clearance
1000 mm
(39.4 in)

MR−0031−93RAGS

2–4 System Site Preparation

2.2.3 Airflow
The system layout must allow enough cool air to be delivered to the cabinets.
Position the cabinets so the heated air from one system is not directed into the
intake airflow of other systems.
Figure 2–2 shows airflow pattern for the CPU cabinet.
The devices installed in the expansion cabinet are equipped with internal cooling
fans. Airflow through the expansion cabinet is front to rear.
Figure 2–2 CPU Cabinet Airflow Pattern

tem

X ft

Sys

MR-0468-92DG

System Site Preparation 2–5

2.2.4 Raised Floor Environment
Raised flooring is frequently used in an air-conditioned computer facility. A raised
floor provides optimum cooling, and reduces hazards and obstructions caused by
power and communication cables.
Cutouts in the floor tiles must be large enough to allow cable connectors to pass
through. The cutouts should be rounded and have molding to prevent cable
damage.
Do not position the system cabinets over cool air outlets, perforations, or grills.

2.3 Environmental Limits
The limits specified in this section must be observed to maintain maximum
availability. Figure 2–3 shows the recommended environmental limits for the
Model 810.

2.3.1 Temperature and Humidity
A computer system may generate heat that cannot be dissipated without the use
of air cooling equipment. A computer room should be capable of:
•

Heating the computer room with all equipment off

•

Cooling all equipment with all the equipment operating at maximum capacity
on the warmest day

•

Humidifying and dehumidifying the room within predetermined limits under
all anticipated weather conditions

Low humidity allows static electricity to build up, while high humidity promotes
corrosion. Both can affect storage media and should be avoided (Figure 2–3).
Temperature and humidity should be monitored and recorded at all times.
The relative humidity may be increased or decreased, as necessary, using
humidification and dehumidification equipment. The temperature and humidity
requirements are specified in Table 2–2.
Table 2–2 Temperature and Humidity Specifications
Specification

Value

Temperature:
Operating

15°C to 32°C (59° to 90°F)

Nonoperating

-40°C to 66°C (-40°F to 151°F)

Storage

-40°C to 66°C (-40°F to 151°F)

Rate of change

9°C/hr (16°F/hr)

Relative humidity:
Operating

10% - 90%

Nonoperating

10% - 95%

Storage

10% - 95%

Operating rate of change

50%/hr (maximum)

Maximum wet-bulb temperature (operating)

28°C (82°F)

Maximum wet-bulb temperature (storage)

46°C (115°F)

Minimum dew point temperature (operating)

2°C (36°F)

2–6 System Site Preparation

Figure 2–3 Psychrometric Chart

90
RECOMMENDED
SYSTEM
=
ENVIRONMENT

.030

.026

.024

.022

.020

DEW-POINT TEMPERATURE

DIGITAL
ENVIRONMENTAL
TEST LIMITS

.018
UL

-B

.016
M

.014

.012

60
60

55
50
45
40
35

.010

55
30

45
20

.008
.006

.004

IT
10%
MID
HU
E
TIV
ELA

HUMIDITY RATIO (W) POUNDS MOISTURE PER POUND DRY AIR

.028

RECOMMENDED
CONTROL
=
TOLERANCE

Y
.002
.0

100 105

AMBIENT TEMPERATURE (DRY BULB) F
MR_X1410_89.DG

System Site Preparation 2–7

2.3.2 Air Filtration
Air cleanliness is important for the reliability of the disk drives and computer
logic. The air conditioning system should filter the air to minimize dust, pollen,
and other air contaminants.
If salt air, corrosive gases, or other pollutants are present, special chemical
filtering may be required. In this case, consult a specialist in air conditioning and
electronic corrosion.

2.3.3 Shock and Vibration
The Model 810 is constructed to withstand normal intermittent building
vibrations. However, it is impossible to anticipate all vibration conditions
that might be encountered at all computer facilities. If shock and vibration levels
at the site are severe or continuous, they should be measured and discussed with
a Digital environmental support engineer and/or an engineering consultant.
Table 2–3 lists the shock and vibration specifications.
Table 2–3 Model 810 Shock and Vibration Specifications
Specification

Value

Shock:
Operating

5.0 g vertical for 10 ms

Nonoperating

Incline impact 1 m/sec (3.25 ft/sec)
Tilt drop 20.8 cm (8 in)

Operating vibration

0.10 g at 5 Hz to 500 Hz

Nonoperating vibration:
Frequency range, vertical

1.19 g at 5 Hz to 300 Hz

Frequency range, longitudinal

0.698 g at 5 Hz to 200 Hz

Frequency range, lateral

0.698 g at 5 Hz to 200 Hz

2–8 System Site Preparation

3
Power and Safety Requirements
This chapter includes:
•

Power distribution and requirements

•

Safety requirements

3.1 Power Distribution and Requirements
3.1.1 Power Distribution
To maintain redundancy, a separate, dedicated circuit is required for each zone.
The recommended power source should include three additional, unused circuits
for future expansion. The electrical system must conform to applicable national
and local codes and ordinances.
Convenience outlets are not provided in the cabinets. Separate circuits are
required for each terminal, modem, printer, or any other additional devices
connected to the system.
Note
An uninterruptible power supply (UPS) is classified as an orderable
option. However, the UPS is a mandatory element in a Model 810
configuration for true fault tolerant operation. The UPS should not be
considered an optional component.

During a total power failure, the uninterruptible power supply (UPS) supports
all internal components (including logic modules and drives) for a minimum of 30
minutes. The UPS does not support any external devices such as terminals and
printers.
The Model 810 system design ensures satisfactory operation on the line power
supplied by most power companies. However, there are many outside variables
over which Digital Equipment Corporation and your power company have no
control.
Receptacles and circuit breakers should be installed and tested by a licensed
electrician prior to the delivery of the system to the facility. To guard against
possible malfunctions from externally radiated or conducted transient voltages,
or from electrical signals superimposed on the power lines, power distribution
within the facility should comply with the following requirements:
•

Each piece of equipment must receive ac power through a single, dedicated
power receptacle and circuit breaker of the recommended value. No other
equipment or loads may be connected to these circuits. See Figure 3–1,
Figure 3–2, and Figure 3–3.

Power and Safety Requirements 3–1

•

All ac power must come from the same bulk distribution panel to ensure
reliable operation. If the building has dedicated lines for auxiliary power or a
backup generator, the power should come from that source.

•

The same ground point must be used in all circuits to the system and to any
equipment connected to it. This ensures the ground (earth) references for all
equipment are at the same potential. For 120 Vac installations, the potential
between neutral and ground (earth) should be no greater than 1 Vac at each
receptacle. In Europe, apply local standards and codes.

If circuit problems exist, rewiring and rerouting of the circuits may be necessary.
Figure 3–1 Single Cabinet AC Power Distribution

Zone A
AC Power
Source

Bulk Distribution or
Auxiliary Power Panel

Zone B
AC Power
Source

Zone B
Front End
Unit

Zone B
Terminal

Zone B
Modem

CPU
Cabinet
Zone A
Modem

Zone A
Terminal

= Circuit Breaker

= AC outlet

Zone A
Front End
Unit

Note:
All outlets for the system components must be connected
to the same ground reference (green or green−yellow wire)
in the AC distribution system.
MR−0028−93RAGS

3–2 Power and Safety Requirements

Figure 3–2 Dual Cabinet AC Power Distribution

Zone A
AC Power
Source

Zone B
AC Power
Source

Bulk Distribution or
Auxiliary Power Panel

Zone B
Front End
Unit

Zone B
Terminal

Zone B
Modem

CPU
Cabinet
Zone A
Modem

Zone A
Front End
Unit

Zone A
Terminal

CB
Expansion
Cabinet

AC
Zone A
Power Distribution Box

= Circuit Breaker

= AC outlet

AC
Zone B
Power Distribution Box

Note:
All outlets for the system components must be connected
to the same ground reference (green or green−yellow wire)
in the AC distribution system.
MR−0029−93RAGS

Power and Safety Requirements 3–3

Figure 3–3 AC Power Distribution with Uninterruptible Power Supplies

Zone A
AC Power
Source

Bulk Distribution or
Auxiliary Power Panel

Zone B
AC Power
Source

Uninterruptible
Power Supply (UPS)

Power Distribution
Panel

Front End
Unit

Terminal

Modem

Terminal

Front End
Unit

Expansion
Cabinet
Zone A
Power Distribution Box

= Circuit Breaker

= AC outlet

Zone B
Power Distribution Box

Notes:
All domestic outlets for the system components must be connected to the same ground
reference (green or green−yellow wire) in the AC distribution system.
The domestic UPS must be connected to a three−phase utility outlet with a connector.
The international UPS must be hardwired to a single−phase outlet. The power
distribution panel must be hardwired to the UPS.
MR−0030−93RAGS

3–4 Power and Safety Requirements

3.1.2 Electrical System
The electrical system within the facility should comply with the following
requirements:
•

The power distribution panel must be easily accessible, or a master switch or
circuit breaker provided, to remove all power to the computer facility in the
event of an emergency.

•

The electrical system must be stable and free from electrical noise and
transients. Do not connect electric motors, air conditioners, office copiers,
or convenience outlets to the same circuits or panels where the system
components are connected. If power disturbances cannot be avoided, power
conditioning equipment may be required.

•

Single-point grounding is required. This is important if the building power
supplies heavy-duty electrical equipment or machinery. The ground terminals
from the receptacles must be connected to the building ground only at the
distribution panel. No equipment connected to the Model 810 should be
connected to any other electrical box, conduit, or water pipe that could cause
heavy ground currents to flow during an electrical malfunction in another
part of the building.

3.1.3 AC Power Cables and Connectors
Digital does not supply circuit breakers, power receptacles, or other items that
may be purchased locally.
The Model 810 ac power connectors and receptacles are specified in Table 3–1.
Table 3–1 AC Power Connectors
Plug

Receptacle

Single-Phase Power Connectors
3-pin NEMA L5-20P

3-pin NEMA L5-20R

3-pin NEMA L5-15P

3-pin NEMA L5-15R

Three-Phase Power Connectors
Hubbel Number 2811

Hubbel Number 2810

5-pin NEMA L21-30P

5-pin NEMA L21-30R

Twist Lock 30 A

DEC PN 12-12314-00

DEC PN 12-12315-01

Power and Safety Requirements 3–5

The international power cables are specified in Table 3–2.
Table 3–2 International Power Cables
Cable Number

Country

BN25T-4E

Austria, Belgium, France, Germany, Finland, Netherlands, Sweden,
Norway, Portugal, Spain

BN18B-4E

UK/Ireland

BN27T-4E

Switzerland

BN27U-4E

Denmark

BN18E-4E

Italy

3.1.4 Power Requirements
Table 3–3 specifies the 120 Vac power requirements for the:
•

Entry System, SBB 56CAA-BA

•

Single Cabinet Package, SBB SV-56CAB-BA

Each zone has one power cord. The current ratings in Table 3–3 are for one zone
power cord, with a fully loaded zone.
Table 3–3 Entry System and Single Cabinet Package 120 Vac Power
Parameter

Minimum

Typical

Maximum

Nominal voltage

—

120 Vac

—

Operational voltage range

100 Vac

—

264 Vac

Nominal frequency

—

60/50 Hz

—

Frequency range

47 Hz

—

63 Hz

Number of phases

—

Phase A

—

16 A

20 A

Neutral N

—

16 A

20 A

Phase A

—

23.8 A

Neutral N

—

23.8 A

Power consumption

—

1853 W

RMS steady state current:

Peak steady state current:

Apparent power

—

1949 VA

Power factor

—

.95

—

3–6 Power and Safety Requirements

Table 3–4 specifies the 240 Vac power requirements for the:
•

Entry System, SBB 56CAA-BA

•

Single Cabinet Package, SBB SV-56CAB-BA

Each zone has one power cable. The current ratings in Table 3–4 are for one zone
power cable, with a fully loaded zone.
Table 3–4 Entry System and Single Cabinet Package 240 Vac Power
Parameter

Minimum

Typical

Maximum

Nominal voltage

—

240 Vac

—

Operational voltage range

100 Vac

—

264 Vac

Nominal frequency

—

50 Hz

—

Frequency range

47 Hz

—

63 Hz

Number of phases

—

Phase A

—

7.5 A

20 A

Neutral N

—

7.5 A

20 A

Phase A

—

23.8 A

Neutral N

—

23.8 A

Power consumption

—

1853 W

Apparent power

—

1949 VA

Power factor

—

.95

—

RMS steady state current:

Peak steady state current:

Power and Safety Requirements 3–7

Table 3–5 specifies the 120 Vac power requirements for the:
•

Dual Cabinet Package, SBB SV-56CBB-BE (with power distribution boxes)

•

Dual Cabinet Advantage Server, SBB DV-56CBB-BE (with power distribution
boxes)

The current ratings in Table 3–5 are for each power distribution box supporting
one half of a fully loaded expansion cabinet. Refer to Table 3–3 for the CPU
cabinet power requirements.
Table 3–5 Dual Cabinet/Advantage Server 120 Vac Power
Parameter

Minimum

Typical

Maximum

Nominal voltage

—

120/208 Vac

—

Operational voltage range

174 Vac

—

264 Vac

Nominal frequency

—

60/50 Hz

—

Frequency range

47 Hz

—

63 Hz

Number of phases

—

Phase A

—

Phase B

—

8.2 A

Phase C

—

8.2 A

Neutral N

—

14 A

RMS steady state current:

Peak steady state current:
Phase A

—

Phase B

—

12 A

Phase C

—

12 A

Neutral N

—

17 A

Power consumption

—

1853 W

Apparent power

—

1949 VA

Power factor

—

.95

—

3–8 Power and Safety Requirements

Table 3–6 specifies the 240 Vac power requirements for the:
•

Dual Cabinet Package, SBB SV-56CBB-BJ (with power distribution boxes)

•

Dual Cabinet Advantage Server, SBB DV-56CBB-BJ (with power distribution
boxes)

The current ratings in Table 3–6 are for each power distribution box supporting
one half of a fully loaded expansion cabinet. Refer to Table 3–3 for the CPU
cabinet power requirements.
Table 3–6 Dual Cabinet/Advantage Server 240 Vac Power
Parameter

Minimum

Typical

Maximum

Nominal voltage

—

220/240 Vac

—

Operational voltage range

100 Vac

—

264 Vac

Nominal frequency

—

60/50 Hz

—

Frequency range

47 Hz

—

63 Hz

Number of phases

—

Phase A

—

8.2 A

Neutral N

—

12 A

Phase A

—

12 A

Neutral N

—

12 A

Power consumption

—

1853 W

Apparent power

—

1949 VA

Power factor

—

.95

—

RMS steady state current:

Peak steady state current:

Power and Safety Requirements 3–9

Table 3–7 specifies the 120 Vac power requirements for the:
•

Dual Cabinet Package, SBB SV-56CBB-BE (with power distribution boxes
and uninterruptible power supplies)

•

Dual Cabinet Advantage Server, SBB DV-56CBB-BE (with power distribution
boxes and uninterruptible power supplies)

The current ratings in Table 3–7 are for each power distribution box supporting
one half of a fully loaded expansion cabinet. Refer to Table 3–3 for the CPU
cabinet power requirements.
Table 3–7 Dual Cabinet Package/Advantage Server 120 Vac Power
Parameter

Minimum

Typical

Maximum

Nominal voltage

—

120 Vac

—

Operational voltage range

100 Vac

—

264 Vac

Nominal frequency

—

60/50 Hz

—

Frequency range

47 Hz

—

63 Hz

Number of phases

—

Phase A

—

15 A 1

Phase B

—

15 A 1

Phase C

—

Neutral N

—

26 A 1

Phase A

—

13 A

21 A 1

Phase B

—

13 A

21 A 1

Phase C

—

13 A

Neutral N

—

37 A 1

Power consumption

—

1853 W

Apparent power

—

1949 VA

Power factor

—

.95

—

RMS steady state current:

Peak steady state current:

1 Current rating during bypass

3–10 Power and Safety Requirements

Table 3–8 specifies the 240 Vac power requirements for the:
•

Dual Cabinet Package, SBB SV-56CBB-BJ (with power distribution boxes and
optional uninterruptible power supplies)

•

Dual Cabinet Advantage Server, SBB DV-56CBB-BJ (with power distribution
boxes and optional uninterruptible power supplies)

The current ratings in Table 3–8 are for each power distribution box supporting
one half of a fully loaded expansion cabinet. Refer to Table 3–3 for the CPU
cabinet power requirements.
Table 3–8 Dual Cabinet Package/Advantage Server 240 Vac Power
Parameter

Minimum

Typical

Maximum

Nominal voltage

—

240 Vac

—

Operational voltage range

100 Vac

—

264 Vac

Nominal frequency

—

50 Hz

—

Frequency range

47 Hz

—

63 Hz

Number of phases

—

Phase A

—

15 A

Neutral N

—

15 A

Phase A

—

21 A

Neutral N

—

21 A

Power consumption

—

1853 W

Apparent power

—

1949 VA

Power factor

—

.95

—

RMS steady state current:

Peak steady state current:

Power and Safety Requirements 3–11

3.2 Safety Requirements
When installing this computer system, observe the following standard safety
requirements:
•

Use caution when deskidding and moving system cabinets; if not handled
correctly, personal injury or property damage can occur.

•

Never move any of the cabinets while they are connected.

•

Have a licensed electrician verify correct grounding of power receptacles.

•

Remove all watches and jewelry before working on power supplies.

•

Turn on all circuit breakers before plugging in the power cable.

•

Verify that all connections to utility power are correct before turning on
power.

•

Remember that safety features built into the system override the power
system. It will shut down before causing damage to the system or personnel.

•

Disconnect the main power plug from utility power before working on the
power system. Wait about 2 minutes for the storage capacitors to discharge.

•

Replace fuses or circuit breakers with a Digital part of the same type and
current rating to prevent damage to the power system and computer area.

3–12 Power and Safety Requirements