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Cisco UCS C240 M3 NEBS Server Service Note

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Cisco UCS C240 M3 NEBS Server Service Note

Table Of Contents

Cisco UCS C240 M3 NEBS Server Service Note

Features Specific to the Cisco UCS C240 M3 NEBS Server

NEBS Compliance

Power Supplies

650 W AC Power Supply

930 W DC Power Supply

Installation Grounding Requirement (DC Power Supplies Only)

Wiring a DC Power Supply

Drive Support

DIMMs

CPUs

Power Supply Specifications

Power Supply LEDs (AC and DC)

650 W AC Power Supply Specifications

930W DC Power Supply Specifications

NEBS GR-1089 Installation Caution and Rules

Related Documentation

Obtaining Documentation and Submitting a Service Request


Cisco UCS C240 M3 NEBS Server Service Note


This document is a supplement to the Cisco UCS C240 Server Installation and Service Guide. This document describes the differences between the Cisco UCS C240 M3 Server and the network equipment building system- (NEBS-) compliant Cisco UCS C240 M3 NEBS Server. This document contains the following sections:

Features Specific to the Cisco UCS C240 M3 NEBS Server

Power Supply Specifications

NEBS GR-1089 Installation Caution and Rules

Related Documentation

Features Specific to the Cisco UCS C240 M3 NEBS Server

When installing or servicing the Cisco UCS C240 M3 NEBS server, you can use the Cisco UCS C240 Server Installation and Service Guide, but note the following exceptions and rules that are specific to the NEBS server.

This section contains the following topics:

NEBS Compliance

Power Supplies

Installation Grounding Requirement (DC Power Supplies Only)

Wiring a DC Power Supply

Drive Support

DIMMs

CPUs

NEBS Compliance

The Cisco UCS C240 M3 NEBS Server has been certified for the following levels of NEBS compliance:

The DC-power version of the server is certified for NEBS Level 3 compliance.

The AC-power version of the server is certified for NEBS Level 1 compliance.

Power Supplies

The Cisco UCS C240 M3 NEBS server can use either AC or DC power supplies.

650 W AC Power Supply

The NEBS server can use one or two 650 W AC power supplies (Cisco PID UCSC-PSU-650W).

The server is certified for NEBS Level 1 compliance when using these AC power supplies.

These power supplies are hot-swappable with 1+1 redundancy when two power supplies are present.

See Power Supply Specifications, for information about these power supplies.

See the Cisco UCS C240 Server Installation and Service Guide, Chapter 3, for information about replacing a power supply.

930 W DC Power Supply

The NEBS server can use one or two 930 W, -48 VDC power supplies (Cisco PID UCSC-PSU-930WDC).

The server is certified for NEBS Level 3 compliance when using these DC power supplies.

These power supplies are hot-swappable with 1+1 redundancy when two power supplies are present.

See Power Supply Specifications, for information about these power supplies.

See the Cisco UCS C240 Server Installation and Service Guide, Chapter 3, for information about replacing a power supply.

Installation Grounding Requirement (DC Power Supplies Only)

The 650 W AC power supplies have internal grounding and so no additional grounding is required when the supported AC power cords are used.

When using the DC power supply, additional grounding of the server chassis to the earth ground of the rack is required. Screw holes for use with your grounding lugs and grounding wires are supplied on the chassis rear panel.


Note The grounding points on the chassis are sized for M5 screws. The grounding points are spaced at 0.625 inches (15.86 mm). You must provide your own screws, grounding lug, and grounding wire. The grounding lug required is a Panduit LCD10-14AF-L or equivalent. The grounding cable that you provide must be 14 AWG (2 mm), minimum 60° C wire, or as permitted by the local code.


See Figure 1-1 for the location of the grounding lug screw-holes on the chassis rear panel.

Figure 1-1 Cisco UCS C240 M3 NEBS Server Rear Panel (DC Power Supply Version)

1

Screw holes for grounding lugs

2

DC power supplies (up to two)


Wiring a DC Power Supply


Warning A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022

Warning This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation. Install only in accordance with national and local wiring regulations. Statement 1045

Warning When installing or replacing the unit, the ground connection must always be made first and disconnected last. Statement 1046

Warning Installation of the equipment must comply with local and national electrical codes. Statement 1074

Warning Hazardous voltage or energy may be present on DC power terminals. Always replace cover when terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in place. Statement 1075

Note The recommended wire gauge is 8 AWG. The minimum wire gauge is 10 AWG.


Use the following procedure to connect wires to the DC power supply connector:


Caution Before beginning this wiring procedure, turn off the DC power source from your facility's circuit breaker to avoid electric shock hazard.


Step 1 Turn off the DC power source from your facility's circuit breaker to avoid electric shock hazard.

Step 2 Remove the DC power connector block from the power supply. (The spare PID for this connector is UCSC-CONN-930WDC=.)

To release the connector block from the power supply, push the orange plastic button on the top of the connector inward toward the power supply and pull the connector block out.

Step 3 Strip 15mm (.59 inches) of insulation off the DC wires that you will use.

Step 4 Orient the connector as shown in Figure 1-2, with the orange plastic button toward the top.

Step 5 Use a small screwdriver to depress the spring-loaded wire retainer lever on the lower spring-cage wire connector. Insert your green (ground) wire into the aperture and then release the lever.

Step 6 Use a small screwdriver to depress the wire retainer lever on the middle spring-cage wire connector. Insert your black (DC negative) wire into the aperture and then release the lever.

Step 7 Use a small screwdriver to depress the wire retainer lever on the upper spring-cage wire connector. Insert your red (DC positive) wire into the aperture and then release the lever.

Step 8 Insert the connector block back into the power supply. Make sure that your red (DC positive) wire aligns with the power supply label, "+ DC".

Figure 1-2 930 W, -48 VDC Power Supply Connector Block

1

Wire retainer lever

2

Orange plastic button on top of the connector



Drive Support

The NEBS server uses the small form-factor, 24-drive backplane with expander. However, the maximum number of drives supported is 16. The drives should be populated in drive bays 1—16.

See Figure 1-3 for the drive-bay numbering.

See the Cisco UCS C240 Server Installation and Service Guide, Chapter 3, for information about replacing a drive.

See the Cisco UCS C240 Server Installation and Service Guide, Appendix C, for information about supported RAID controllers and cabling.

Figure 1-3 Cisco UCS C240 NEBS Server (Drive Bays 1—16)

DIMMs

The NEBS server supports a maximum DIMM size of 16 GB (32-GB DIMMs are not supported).

Load-reduce DIMMs (LRDIMMs) are not supported.

See the Cisco UCS C240 Server Installation and Service Guide, Chapter 3, for information about populating and replacing DIMMs.

CPUs

The NEBS server supports only two types of CPU: Intel Xeon E5-2620 and E5-2658.

See the Cisco UCS C240 Server Installation and Service Guide, Chapter 3, for information about populating and replacing CPUs.

Power Supply Specifications

This section contains the following topics:

Power Supply LEDs (AC and DC)

650 W AC Power Supply Specifications

930W DC Power Supply Specifications

Power Supply LEDs (AC and DC)

Figure 1-4 shows the rear of the 930 W DC power supply, but the LEDs and their states are the same for the 650 W AC power supply. See Table 1-1 for an explanation of the LED states.

Figure 1-4 930 W, -48 VDC Power Supply (Rear View)

1

Power supply fault LED

3

DC input connector

2

Power supply status LED

   

Table 1-1 Power Supply LEDs, Definition of States 

LED Name
State

Power supply fault

Off—The power supply is operating normally.

Amber, blinking—An event warning threshold has been reached, but the power supply continues to operate.

Amber, solid—A critical fault threshold has been reached, which causes the power supply to shut down (for example, a fan failure or an over-temperature condition).

Power supply status

Off—There is no DC power to the power supply.

Green, blinking—DC power OK; DC output not enabled.

Green, solid—DC power OK; DC outputs OK.


650 W AC Power Supply Specifications

Table 1-2 lists the specifications for each 650 W AC power supply (Cisco PID UCSC-PSU-650W).

Table 1-2 650 W AC Power Supply Specifications

Description
Specification

Class

RSP1

Input

AC input voltage range

100-120 V and 200-240V nominal
(self-ranging, 90-264 VAC)

AC input frequency

Range: 50 to 60 Hz nominal (single phase, 47 to 63 Hz)

AC line input current (steady state)

7.6 A peak at 100 VAC
3.65 A peak at 208 VAC

Output

Maximum output power for each power supply

650 W

Power supply output voltage

Main power: 12 VDC

Standby power: 12 VDC


930W DC Power Supply Specifications

Table 1-3 lists the specifications for each 930 W DC power supply (Cisco PID UCSC-PSU-930WDC).

Table 1-3 930 W DC Power Supply Specifications

Description
Specification

Class

RSP1

Input

DC input voltage range

-48 to -60 VDC nominal
(self-ranging, -40 to -72 VDC)

DC line input current (steady state)

23 A peak at -48 VDC

Output

12 V main power output

930 W

12 V standby power output

30 W

Power supply output voltage

Main power: 12 VDC

Standby power: 12 VDC


NEBS GR-1089 Installation Caution and Rules

The following information is derived from the NEBS GR-1089 specification, Electromagnetic Compatibility and Electrical Safety—Generic Criteria for Network Telecommunications.

This content also appears in the Regulatory Compliance and Safety Information For Cisco UCS C-Series Servers.


Caution The intrabuilding ports (Ethernet and serial) of the equipment or subassembly is suitable for connection to intrabuilding or unexposed wiring or cabling only. The intrabuilding ports of the equipment or subassembly must not be metallically connected to interfaces that connect to the outside plant (OSP) or its wiring. These interfaces are designed for use as intrabuilding interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE) and require isolation from the exposed OSP cabling. The addition of primary protectors is not sufficient protection in order to connect these interfaces metallically to OSP wiring.

The Cisco Unified Computing System (UCS) has AC power ports that are intended for deployments where an external Surge Protective Device (SPD) is utilized at the AC power service equipment (see the definition in National Electric Code).

The Cisco UCS is designed for a Common Bonding Network (CBN) installation.

The Cisco UCS can be installed in network telecommunication facilities or locations where the National Electric Code applies.

An electrical conducting path shall exist between the product chassis and the metal surface of the enclosure or rack in which it is mounted or to a grounding conductor. Electrical continuity shall be provided by using thread-forming type mounting screws that remove any paint or nonconductive coatings and establish a metal-to-metal contact. Any paint or other nonconductive coatings shall be removed on the surfaces between the mounting hardware and the enclosure or rack. The surfaces shall be cleaned and an antioxidant applied before installation.

The DC return connection to this system should remain isolated from the system frame and chassis (DC-I).

The nominal DC operating voltage is -48 VDC.

The intrabuilding RJ-45 Ethernet ports of the equipment or subassembly must use shielded intrabuilding cabling or wiring that is grounded at both ends.

Related Documentation

This document is intended to be a supplement for the Cisco UCS C240 Server Installation and Service Guide. The documentation set for the Cisco Unified Computing System (UCS) C-Series rack-mount servers is also described in the roadmap document at the following link:

Cisco UCS C-Series Documentation Roadmap

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What's New in Cisco Product Documentation as an RSS feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service. Cisco currently supports RSS Version 2.0.


This document is to be used in conjunction with the documents listed in the "Related Documentation" section.