Sentry -48VDC PDUs

Sentry -48VDC PDUs and Remote Power Managers

Server TechnologySolutions for the Data Center Equipment Cabinet

STI Reseller Training

February 2006

Who needs -48 VDC Equipment?

Any Enterprise or Service Providers that rely on -48VDC internetworking equipment such as:

•Routers

•ATM Switches and

•DSLAMs


Sentry -48VDC provides the following functionality:

• Power Distribution : distribute dual power input feeds to multiple equipment units in a rack or cabinet. All models.

• Power Measurement : Extend network management capabilities and protect the investment in internetworking devices with SNMP traps and individual load sensing per output pair. Remote Power Manager (RPM) units only.

• Remote Power Control : Perform a remote reboot and fix “locked-up” or failing equipment. RPM units.

• Power Protection : GMT fuses, TPA fuses, TPC fuses and Circuit-Breakers provide per-output over-current and fault protection. Protection type varies by model.


• Each output terminal connection is protected by a TPC fuse

• TCP/IP Control: to remotely Power On, Power Off or Reboot supported equipment via:

– SSH, SSL, HTTP/HTTPS (HTML Web GUI), SNMP and Telnet.

– Out-of-Band access (RS232/Console)– Optional Global Security Modem

supports Passwords and Call-Back

• LDAP/Active Directory and TACACS+ Authentication and Authorization support

– provides additional security and simplifies user-management for large-scale deployments

• Grouping of output pairs (supports multiple supply equipment)


Key Features• Logging of All Authentications

- Power actions - Configuration changes - System events

• Flash-upgrade via single FTP - Configuration upload/download support via built in FTP server

• Temperature & Humidity Monitoring • NEBS Compliant• Multiple Users Simultaneous Access

•104 user accounts

•18 simultaneous sessions

• Basic Units (PDU400 and PDU420)

• Rugged and reliable DC power distribution

• Qty (2) 50/100/200A DC Power Input Feeds (A Feed and B Feed); Supports dual power supply routers and networking gear

• Multiple DC Outlet Circuits: Protected by GMT or TPA fuses

• Outlet Circuit Protection: Fast acting fuse with positive visual indication of a blown fuse

– fuses are UL Recognized as a ‘hot’ disconnect/re-connect switch

• Variable Amperage and Interchangeable Fuses: Match the fuse value to the amp rating of each device

• Up to (24) output terminal connections

• 1U or 2U 19” chassis fits equipment cabinets or racks

• Fail-Safe: Model allows either the A or B power in-feed to support the entrire output load if a power loss occurs on one input

• NEBS Compliant

Server TechnologySolutions for the Data Center Equipment Cabinet Basic Products


Sentry -48VDC Basic Product Line

PDU400-0-2 Power Input• Qty (2) 100A power input terminal blocks (+/- & G), -48 VDCPower Output• Qty (16) (.5A to 15A) max output pairs protected with GMT fuses.•Qty (8) (5 to 50A) max output pairs protected with TPA fuses.• Basic power distribution

PDU400-0-3 Power Input• Qty (2) 200A power input terminal blocks (+/- & G), -48 VDCPower Output• Qty (16) (.5A to 15 A) max output pairs protected by GMT fuses.•Qty (8) (5 to 50A) max output pairs protected by TPA fuses.•Basic power distribution


Sentry -48VDC Basic Product Line

PDU400-F-2 Power Input• Qty (2) 100A power input terminal blocks (+/- & G), -48 VDCPower Output• Qty (16) (.5A to 15A) max output pairs protected with GMT fuses.•Qty (8) (5 to 50A) max output pairs protected with TPA fuses• Fail Safe

PDU420-0-1 Power Input• Qty (2) 50A power input terminal blocks (+/- & G), -48 VDCPower Output• Qty (20) (.5A to 15 A) max output pairs protected by GMT fuses.•Basic power distribution

• Switched Units/Remote Power Managers: 4805, 4820, 4835, 4870 and 4805/35

• Remote Power Management: Combines intelligent power distribution. Load-measurement per output pair, and remote power control

• Qty (2) 100-Amp DC Power Input Feeds (A Feed and B Feed); Supports multiple power supply routers and networking gear

• Master XLS and Expansion XMS expands number of outputs controlled through a single interface and eliminates single-point-of-failure concerns

• Multiple DC Outlet Circuits: Protected by GMT or TPC fuses (4805, 4870, 4805/35) or circuit-breakers (4820, 4835)

• Fuses are UL Recognized as ‘hot’ disconnect/re-connect switch

• Circuit-breakers are Push-to-close/Pull-to-open for use as a switch

• Variable Amperage and Interchangeable Fuses: Match the fuse value to the amp rating of each outlet circuit

• IP Access: For Remote Power On, Power Off or Reboot

• SNMP Traps and Email notification of events

• Environmental Monitoring – Support for two Temperature+Humidity probes; 4805, 4870 and 4805/35 master XLS models only

• Load Sense: Current draw per output pair

• NEBS Complaint


Switched Products


Sentry -48VDC Switched Product Line

4805-XLS-16 & 4805-XMS-16 Power Input• Qty (2) 100A power input terminal blocks (+/- & G), -48 VDCPower Output• Qty (16) 10A max load-measured output pairs protected with GMT fuses.• Switched outputs

4805/35-XLS-12 & 4805/35-XMS-12 Power Input• Qty (2) 100A power input terminal blocks (+/- & G), -48 VDCPower Output• Qty (8) 10A max load-measured output pairs protected with GMT fuses• Qty (4) 70A max load-measured output pairs protected with TPC fuses. Rated for 70A switching and up-to 75A fusing• Switched outputs



4820-XLS-8 & 4820-XMS-8 Power Input• Qty (2) 100A power input terminal blocks (+/- & G), -48 VDCPower Output• Qty (8) 20A load-measured output pairs with 25A push-to-reset, pull-to-break circuit breakers; Switched outputs• Qty (1) 5A non-switched, non-measured Auxiliary output with 5A circuit breaker

4835-XLS-4 & 4835-XMS-4 Power Input• Qty (2) 100A power input terminal blocks (+/- & G), -48 VDCPower Output• Qty (4) 35A load-measured output pairs with 40A push-to-reset pull-to-break circuit breakers; Switched outputs• Qty (1) 5A non-switched, non-measured Auxiliary output with 5A circuit breaker



4870-XLS-4 & 4870-XMS-4 Power Input• Qty (2) 100A power input terminal blocks (+/- & G), -48 VDCPower Output• Qty (4) 70A max load-measured output pairs protected with TPC fuses. Rated for 70A switching and up-to 75A fusing; Switched outputs• Qty (1) 5A non-switched, non-measured Auxiliary output with 5A circuit breaker (not pictured)

Fuses


GMT Fuse Values

1/2, 3/4, 1, 1.5, 2, 3, 4, 5, 7.5 or 10-amps

TPC Fuse Values

25, 30, 40, 50, 60 or 75-Amps TELPOWER

TPC-40AMPS

Bussmann

TELPOWER

TPC-40AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-30AMPS

Bussmann

TELPOWER

TPC-30AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-50AMPS

Bussmann

TELPOWER

TPC-50AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-60AMPS

Bussmann

TELPOWER

TPC-60AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-75AMPS

Bussmann

TELPOWER

TPC-75AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-25AMPS

Bussmann

TELPOWER

TPC-25AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-20AMPS

Bussmann

TELPOWER

TPC-20AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-15AMPS

Bussmann

TELPOWER

TPC-15AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-12AMPS

Bussmann

TELPOWER

TPC-12AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-10AMPS

Bussmann

TELPOWER

TPC-10AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-8AMPS

Bussmann

TELPOWER

TPC-8AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-7AMPS

Bussmann

TELPOWER

TPC-7AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-6AMPS

Bussmann

TELPOWER

TPC-6AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-5AMPS

Bussmann

TELPOWER

TPC-5AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-4AMPS

Bussmann

TELPOWER

TPC-4AMPS

Bussmann

FUSE

FUSE

TELPOWER

TPC-3AMPS

Bussmann

TELPOWER

TPC-3AMPS

Bussmann

FUSE

FUSE

Bussmann TelPower Compact (TPC) fuses

Fuses are:-DC Specific-High interrupt rating (100,000 Amps)-Time delay/current limiting-User Selectable-Spare fuse holder (on each unit)

Note: See handouts for additional fuse and circuit breaker information

Remote Power Management Capabilities with SNMP traps

• Load Sense – measures load in amps that each connected server, internetworking device and telecom unit is drawing

• Input feed/Outlet On-Sense - Verifies voltage at each power input/outlet connection.

• External Temperature and Humidity Sense – makes sure that remote hardware operates only in optimal temperatures (up to 2); not available on 4820 and 4835

• SNMP Power Control – Supports use of SNMP set instructions for outlet level control, SNMP traps, Management Information Base (MIB) & Object Identification Tree (OIDTree) available on-line



Unique Expansion Capability

• Any “master” XLS unit can be linked to an “expansion” XMS unit

• One IP address

• Reduce costs

• Grouping across devices pairs for simultaneous power up of multiple supply devices

• Provides redundant power sources for fail-safe operations

•Eliminates single point of failure (see diagram on slide 16)

How does a Sentry -48VDC Remote Power Manager Support Equipment?


This setup supports full redundancy and eliminates single point-of-failure concerns by allowing each Cisco power supply to connect and separate Sentry Remote Manager units.

Each Output Fused at: 40 ACisco Power Supply Output: 4000 W each

H-Tap used on each source to provide power to both input blocks on each Sentry -48 VDC Remote Power Manager.

XLS-to-XMS data link allows 8 switched outputs to be addressed through a single unified interface. All 6 output connections to the Cisco OSR-7609 may be grouped together such that one command controls all power delivered to both 4000 W Cisco power supplies.

Sentry 4870-XLS-4 and 4870-XMS-4 Typical Setup for Cisco OSR-7609 w/Dual 4000W Power Supplies

A

+RTN

GN

D-4

8VD

C

+RTNG

ND

-48VDC

www.servertech.com

F1 F2 F1 F2

B5

AUX

A1- A1+ A2- A2+ B1- B1+ B2- B2+

+-

TELPOW

ER

TPC-40AMPS

Bussmann

TELP

OWER

TPC

-40 AM

PSBu

ssma

nn FUSEFUSE

TELPOW

ER

TPC-40AMPS

Bussmann

TELP

OWER

TPC

-40 AM

PSBu

ssma

nn FUSEFUSE

TELPOWER

TPC-40

AMPS

Bussmann

TELP

OW

ER

TPC-

40 AMPS

Buss

mann FUSE

FUSE

TELPOWER

TPC-40

AMPS

Bussmann

TELP

OW

ER

TPC

-40 AM

PSBu

ssma

nn FUSE

FUSE

+RTN

GN

D-4

8VD

C

+RTN

GN

D-48VD

C

www.servertech.com

F1 F2 F1 F2

B5

AUX

A1- A1+ A2- A2+ B1- B1+ B2- B2+

+-

TELPOWER

TPC-40AM

PSBussmann

TELP

OWER

TPC

-40 AM

PSBu

ssma

nn FUSE

FUSE

TELPOWER

TPC-40AM

PSBussmann

TELP

OWER

TPC-

40 AMPS

Buss

mann FUSE

FUSE

TELPOWER

TPC-40

AMPS

Bussmann

TELP

OW

ER

TPC

-40 AM

PSBu

ssma

nn FUSE

FUSE

TELPOWER

TPC-40

AMPS

Bussmann

TELP

OW

ER

TPC-

40 AMPS

Buss

mann FUSE

FUSE

Power Supply 1 Power Supply 2

9 8 7 6 5 4 3 2 1

FANSTATUS

OSR-7609

+A +

+B

4870-XLS-4 (Master)

-+

G

-+ G

-+

G

-+

-+

G

-+

4870-XMS-4 (Expansion unit)

XLSß

àX

MS

Data Link C

able

4870-XMS-4 Expansion Unit

4870-XLS-4 Master

Secure Web Interface


-Fully embedded

-Individual outlet load monitoring

-Outlet Remote Control

-Individual or Grouped

Beginning with Benjamin Franklin, it was traditionally assumed that electricity flows from a positively charged region to a negatively charged region. The discovery of the electron corrected that. Electricity actually flows from a negatively charged region to a positively charged region; electrons move from the negative (-) to the positive (+).

Thusly, the negative (-) is the source, the positive (+) is the return, and the implications with respect to a Sentry -48VDC Remote Power Manager are:

• The negative (-) conductor from each Sentry output to each device must be electrically isolated

• Though not required, the positive (+) return output to each device may be electrically common.

Conversely, a positive (+) direct-current system would require that the positive (+) return to each device be electrically isolated and would allow the negative (-) connection to be common. A simple example of a positive (+) system is the electrical distribution in most automobiles. The negative (-) source of the 12V car battery is connected to the metal frame of the car and is common such that the negative terminal for each device (stereo, headlights, etc.) is easily attached to the frame at any point. The positive (+) terminal for each device is then individually conducted to the positive terminal of the battery. Fuses for each device are located on the individual conductors between each device and the positive terminal of the battery.


So why is it called “-48VDC”?

A common question is “can the Sentry -48VDC Remote Power Managers work with a +48VDC system?” The answer is NO.


• All Sentry Switched -48VDC Remote Power Managers are engineered for a -48VDC system. Of particular importance is the fact that the relay for each switched output is positioned on the negative terminal; only the negative (-) terminal of each output pair (+/-) is switched on/off. Additionally, both the load-measurement circuit and over-current protection for each device are also positioned on the negative (-) lines.

• The following simple wiring diagram illustrates the typical Sentry power distribution layout. Specifically, this diagram shows the basic distribution layout for one half of a Sentry 4870 unit.

A

+RTN

GN

D-4

8VD

C

A1- A1+ A2- A2+

TELPOW

ER

TPC-50AM

PS

Bussmann

TELP

OW

ER

TPC-

50 AMPS

Buss

man

n FUSEFUSE

TELPOW

ER

TPC-50AMPS

Bussmann

TELP

OW

ER

TPC-

50 AMPS

Buss

man

n FUSEFUSE

Fuse A1

Fuse A2

Relay A1, closed

Relay A2, closed


Now, we add some loads (light bulbs)and indicate the current flow w/ arrows:

A

+RTN

GN

D-4

8VD

C

TELPOW

ER

TPC-50AM

PS

Bussmann

TELP

OW

ER

TPC

-50 AM

PS

Buss

man

n FUSEFUSE

TELPOW

ER

TPC-50AM

PS

Bussmann

TELP

OW

ER

TPC

-50 AM

PS

Buss

man

n FUSEFUSE

Fuse A1

Fuse A2

Relay A1, closed

Relay A2, closed

-+ +

· Positive is common within Sentry and can be common across loadsoutside of the Sentry. See areas noted in blue.

Positive (+) can be common at other points

Positive (+) is commonat this point

· This is a negative DC system. Positive (+) can be common.

If a user instructs output A1 to turn off,we see that everything works.

A

+RTN

GN

D-4

8VD

C

TELPOW

ER

TPC-50AM

PS

Bussmann

TELP

OW

ER

TPC-

50 AMPS

Buss

man

n FUSEFUSE

TELPOW

ER

TPC-50AM

PS

Bussmann

TELP

OW

ER

TPC

-50 AM

PS

Buss

man

n FUSEFUSE

Fuse A1

Fuse A2

Relay A1, closed

Relay A2, closed

-+

· Relay A1 opening interrupts the circuit to the attached device and the device turns off.

+


Now, the diagram to the right illustratesa -48VDC Sentry unit connected to loads requiring a positive system(because the negative is common).

A

+RTN

GN

D-4

8VD

C

TELPOW

ER

TPC-50AM

PS

Bussmann

TELP

OW

ER

TPC

-50 AM

PS

Buss

man

n FUSEFUSE

TELPOW

ER

TPC-50AM

PS

Bussmann

TELP

OW

ER

TPC

-50 AM

PS

Buss

man

n FUSEFUSE

Fuse A1

Fuse A2

Relay A1, closed

Relay A2, closed

-+

· Note that the bulbs now have a common negative indicated by the blue arrows.

Negative (-) is common here

Positive (+) is commonat this point

· Power is successfully delivered, however...

If a user instructs output A1 to turn off,the device does not turn off.

A

+RTN

GN

D-4

8VD

C

TELPOW

ER

TPC-50AM

PS

Bussmann

TELP

OW

ER

TPC

-50 AM

PS

Buss

man

n FUSEFUSE

TELPOW

ER

TPC-50AM

PS

Bussmann

TELP

OW

ER

TPC

-50 AM

PS

Buss

man

n FUSEFUSE

Fuse A1

Fuse A2

Relay A1, open

Relay A2, closed

-+

· Relay A1 opens but the attached load continues to receive power from the the alternate path due to the common negative (-).

· Power continues to be delivered and the load increases on the alternate path.

· Similarly, if either fuse opens to clear a fault, the fault will ‘blow’ the other fuse.


Agency Approvals

• EN 60950-1• UL 60950-1• CAN/CSA-22.2 No. 60950-103• CB report• cTUVus for NA• TUV-GS for Europe• FCC Class A• CE Mark• NEBS Compliant

Customers using Sentry -48VDC



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Sentry -48VDC PDUs

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