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SRX5400 Power System

SRX5400 Services Gateway Power System Overview

The services gateway uses either AC or DC power supplies.

Note:

The SRX5400 Services Gateway and SRX5600 Services Gateway use the same power supply model.

The services gateway is configurable with two or three AC power supplies by default (optionally, a fourth power supply can be added) or two DC power supplies. The AC power supplies are located horizontally at the rear of the chassis in slots PEM0 through PEM3 (left to right) and the DC power supplies are located in slots PEM0 and PEM2. The power supplies connect to the midplane, which distributes the different output voltages produced by the power supplies to the services gateway components, depending on their voltage requirements. Each power supply is cooled by its own internal cooling system.

CAUTION:

The services gateway cannot be powered from AC and DC power supplies simultaneously. The first type of power supply detected by the services gateway when initially powered on determines the type of power supply allowed by the services gateway. All installed power supplies of the other type are disabled by the services gateway. If you install a power supply of the other type while the services gateway is operating, the services gateway disables the power supply and generates an alarm.

Redundant power supplies are hot-removable and hot-insertable. When you remove a power supply from a services gateway that uses a nonredundant power supply configuration, the services gateway might shut down depending on your configuration.

Table 1 summarizes the available power supply types, their output capacities, and their redundancy and power distribution schemes. For detailed power supply specifications, see SRX5400 Services Gateway AC Power Supply Specifications or SRX5400 Services Gateway DC Power Supply Specifications.

Table 1: Power Supply Type Summary

Power Supply Type

Input Condition (If Any)

Maximum Output

Redundancy

AC

Low-line (110 V Input)

1167 W

2+1

High-line (220 V Input)

2050 W

2+1

DC

DIP=0 (60 A Input)

2240 W

1+1

DIP=1 (80 A Input)

2440 W

1+1

In all power supply configurations, the power distribution and total power is shared by all of the components in the services gateway chassis. The power supplies are guaranteed to provide adequate power to the system. In the low-line (110VAC input) and high-line (220VAC input) configurations, two power supplies are required to support the services gateway electrical requirements. Although the services gateway is configurable with three AC (2+1) power supplies, you can add a fourth power supply for fault tolerance. The fourth power supply is used when one of the power supplies in the 2+1 configuration fails.

Note:

There are no slot restrictions for AC power supplies. If you are using DC power supplies, then use the slots as shown in Table 2.

Table 2: PSU Slot Restrictions

PSU

Minimum PSU Requirement

PEM Slot

PSU Redundancy Requirements

PEM Slot

110V AC PSU

2

Any

3

Any

220V AC PSU

2

Any

3

Any

DC PSU

1

PEM0 & PEM2

2

PEM2

SRX5400 Services Gateway AC Power Supply

Each AC power supply consists of one AC appliance inlet, an AC switch, a fan, and LEDs to monitor the status of the power supply. Figure 1 shows the power supply. Each inlet requires a dedicated AC power feed and a dedicated 16 A @ 100 VAC or 16 A @ 200 VAC circuit breaker, or as required by local code.

Figure 1: AC Power SupplyAC Power Supply
Warning:

The services gateway is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal (sized for UNC 1/4-20 ground lugs) provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earthing terminal must be permanently connected to earth.

Note:

The SRX5400 Services Gateway and SRX5600 Services Gateway use the same power supply model.

SRX5400 Services Gateway AC Power Supply Specifications

Table 3 lists the AC power supply electrical specifications.

Table 4 lists the AC power system electrical specifications.

Table 3: AC Power Supply Electrical Specifications

Item

Specification

Maximum output power

1167 W (low line)

2050 W (high line)

AC input current rating

16 A @ 110 VAC maximum

15.1 A @ 200 VAC maximum

AC input voltage

Operating range: 100 - 240 VAC (nominal)

AC input line frequency

50 to 60 Hz (nominal)

Table 4: AC Power System Specifications

Item

Low-Line (110V)

High-Line (220V)

Redundancy

2+1

2+1

Output power (maximum) per power supply

1167 W

2050 W

Output power (maximum) per system

3501 W

4100 W

SRX5400 Services Gateway AC Power Supply LEDs

Each AC power supply faceplate contains three LEDs that indicate the status of the power supply (see Table 5). The power supply status is also reflected in two LEDs on the craft interface. In addition, a power supply failure triggers the major alarm LED on the craft interface.

Table 5: AC Power Supply LEDs

Label

Color

State

Description

AC OK

Amber

Off

AC power input voltage is below 78 VAC.

Green

On

AC power input voltage is within 78–264 VAC.

DC OK

Green

Off

DC power outputs generated by the power supply are not within the normal operating ranges.

On

DC power outputs generated by the power supply are within the normal operating ranges.

PS FAIL

Red

Off

Power supply is functioning normally.

On

Power supply is not functioning normally and its output voltage is out of regulation limits. Check AC OK and DC OK LEDs for more information.

AC Power Cord Specifications for the SRX5400 Services Gateway

Each AC power supply has a single AC appliance inlet located on the power supply that requires a dedicated AC power feed. Most sites distribute power through a main conduit that leads to frame-mounted power distribution panels, one of which can be located at the top of the rack that houses the services gateway. An AC power cord connects each power supply to the power distribution panel.

The services gateway is not shipped with AC power cords. You must order power cords separately using the model number shown in Table 6. The C19 appliance coupler end of the cord see Figure 2, inserts into the AC appliance inlet coupler, type C20 (right angle) as described by International Electrotechnical Commission (IEC) standard 60320. The plug end of the power cord fits into the power source receptacle that is standard for your geographical location.

Figure 2: C19 Appliance CouplerC19 Appliance Coupler

Table 6 provides specifications and depicts the plug on the AC power cord provided for each country or region.

Table 6: AC Power Cord Specifications

Country

Model Number

Electrical Specification

Plug Type

Graphic

Australia

CBL-M-PWR-RA-AU

240 VAC, 50 Hz AC

SAA/3/15

China

CBL-M-PWR-RA-CH

220 VAC, 50 Hz AC

CH2-16P

Europe (except Denmark, Italy, Switzerland, and United Kingdom)

CBL-M-PWR-RA-EU

220 or 230 VAC, 50 Hz AC

CEE 7/7

Italy

CBL-M-PWR-RA-IT

230 VAC, 50 Hz AC

CEI 23-16/VII

Japan

CBL-PWR-RA-JP15

125 VAC, 50 or 60 Hz AC

JIS 8303

CBL-M-PWR-RA-JP

220 VAC, 50 or 60 Hz AC

NEMA L6-20P

North America

CBL-PWR-RA-US15

125 VAC, 60 Hz AC

NEMA 5-15P

CBL-PWR-RA-TWLK-US15

125 VAC, 60 Hz AC

NEMA L5-15P

CBL-M-PWR-RA-US

250 VAC, 60 Hz AC

NEMA 6-20

CBL-M-PWR-RA-TWLK-US

250 VAC, 60 Hz AC

NEMA L6-20P

United Kingdom

CBL-M-PWR-RA-UK

240 VAC, 50 Hz AC

BS89/13

Worldwide (except Japan)

CBL-EX-PWR-C19-C20

240 VAC, 50 Hz AC

EN 60320-2-2/1

Warning:

The AC power cord for the services gateway is intended for use with the services gateway only and not for any other use.

Warning:

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the services gateway chassis before connecting power. See Grounding the SRX5400 Services Gateway for instructions.

CAUTION:

Power cords and cables must not block access to device components or drape where people could trip on them.

Note:

In North America, AC power cords must not exceed 4.5 m (approximately 14.75 ft) in length, to comply with National Electrical Code (NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52, and Canadian Electrical Code (CEC) Section 4-010(3). The cords listed in Table 6 are in compliance.

AC Power Circuit Breaker Requirements for the SRX5400 Services Gateway

Each AC power supply has a single AC appliance inlet located on the power supply that requires a dedicated AC power feed. We recommend that you use a customer site circuit breaker rated for 15 A (250 VAC) minimum for each AC power supply, or as required by local code. Doing so enables you to operate the services gateway in any configuration without upgrading the power infrastructure.

SRX5400 Services Gateway DC Power Supply

Each DC power supply consists of one DC input (–48 VDC and return), one 40 A (–48 VDC) circuit breaker, a fan, and LEDs to monitor the status of the power supply. Figure 3 shows the power supply. Each DC power supply has a single DC input (–48 VDC and return) that requires a dedicated facility circuit breaker.

We recommend that you provision 60 A or 70 A per feed, depending on the selected DIP switch setting.

Figure 3: DC Power Supply FaceplateDC Power Supply Faceplate
Note:

The SRX5400 Services Gateway and SRX5600 Services Gateway use the same power supply model.

SRX5400 Services Gateway DC Power Supply Specifications

Table 7 lists the DC power supply electrical specifications. Table 8 lists the DC power system specifications.

Table 7: DC Power Supply Electrical Specifications

Item

Specification

 

DIP=0 (60 A Input)

DIP=1 (80 A Input)

Maximum output power

2400 W

2600 W

DC input voltage

Minimum: –40.5 VDC

Nominal: –48 VDC

Operating range: –40.5 to –72 VDC

DC input current rating

50 A @ –48 V nominal operating voltage

54.2 A @ –48 V nominal operating voltage

Internal Supplementary Protector

None

None

Table 8: DC Power System Specifications

Item

Specification

DIP=0 (60 A Input)

DIP=1 (80 A Input)

Redundancy

1+1

1+1

Output power (maximum) per power supply

2400 W

2600 W

Output power (maximum) per system

2400 W

2600 W

SRX5400 Services Gateway DC Power Supply LEDs

Each DC power supply faceplate contains three LEDs that indicate the status of the power supply (see Table 9). In addition, a power supply failure triggers the major alarm LED on the craft interface.

Note:

The SCB must be present for the PWR OK LED to go on.

Table 9: DC Power Supply LEDs

Label

Color

State

Description

PWR OK

Green

Off

Power supply is not functioning normally. Check the INPUT OK LED for more information.

On

Power supply is functioning normally.

Amber

On

The main output voltage is out of range (lower limit: 37.5 V to 39.5 V; upper limit: 72.5 V to 76 V).

BRKR ON

Green

Off

DC power supply circuit breaker is turned off.

Green

On

DC power input is present and the DC power supply circuit breaker is turned on.

INPUT OK

Green

Off

DC input to the PEM is not present.

On

DC input is present and is connected in correct polarity.

Amber

On

DC input is present, but not in valid operating range or connected in reverse polarity.

DC Power Cable Specifications for the SRX5400 Services Gateway

Table 10 summarizes the specifications for the power cables, which you must supply.

Table 10: DC Power Cable Specifications

Cable Type

Quantity

Specification

Power

Four 6-AWG (13.3 mm2) cables for each power supply

Minimum 60°C wire, or as required by the local code

CAUTION:

You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply.

DC Power Cable Lug Specifications for the SRX5400 Services Gateway

The accessory box shipped with the services gateway includes the cable lugs that attach to the terminal studs of each power supply (see Figure 4).

Figure 4: DC Power Cable LugDC Power Cable Lug
CAUTION:

Before services gateway installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the services gateway.

Warning:

The services gateway is a pluggable type A equipment installed in restricted access location. It has a separate protective earthing terminal [Metric -M6 and English - ¼-20 screw) ground lugs] provided on the chassis. This separate protective earth terminal must be permanently connected to earth.

DC Power Circuit Breaker Requirements for the SRX5400 Services Gateway

Each DC power supply has a single DC input (–48 VDC and return) that requires a dedicated facility circuit breaker. We recommend that you use a customer site circuit breaker rated for 40 A (–48 VDC) minimum for each DC power supply, or as required by local code. Doing so enables you to operate the services gateway in any configuration without upgrading the power infrastructure.

If you plan to operate a DC-powered services gateway at less than the maximum configuration and do not provision a 40 A (–48 VDC) circuit breaker, we recommend that you provision a circuit breaker for each DC power supply rated for at least 125% of the continuous current that the system draws at –48 VDC, or as required by local code.

DC Power Source Cabling for the SRX5400 Services Gateway

Figure 5 shows a typical DC source cabling arrangement.

Figure 5: Typical DC Source Cabling to the Services GatewayTypical DC Source Cabling to the Services Gateway

The DC power supplies must be powered by dedicated power feeds.

CAUTION:

You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply.

Warning:

For field-wiring connections, use copper conductors only.

CAUTION:

Power cords and cables must not block access to device components or drape where people could trip on them.

SRX5400 Services Gateway Chassis Grounding Point Specifications

Warning:

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the services gateway chassis before connecting power. See Grounding the SRX5400 Services Gateway for instructions.

CAUTION:

Before services gateway installation begins, a licensed electrician must attach cable lugs to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the services gateway.

The services gateway chassis has one grounding point at the upper right corner of the back panel. The grounding point consists of two threaded holes spaced 0.625-in. (15.86-mm) apart (Figure 6). The grounding point holes fit UNC 1/4–20 screws. The accessory box shipped with the services gateway includes the cable lug that attaches to the grounding cable and two UNC 1/4–20 screws used to secure the grounding cable to the services gateway grounding point.

Figure 6: SRX5400 Services Gateway Grounding PointSRX5400 Services Gateway Grounding Point

To ground the services gateway, you must connect a grounding cable to earth ground and then attach it to the chassis grounding point using the two screws provided.

Note:

Additional grounding is provided to an AC-powered services gateway when you plug its power supplies into grounded AC power receptacles.

SRX5400 Services Gateway Grounding-Cable Specification

The grounding cable that you provide must meet the specifications in Table 11.

Table 11: Grounding Cable Specifications

Cable Type

Quantity and Specification

Grounding

One 6-AWG (13.3 mm2), minimum 60°C wire, or as required by the local code

Warning:

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must properly ground the services gateway chassis before connecting power. See Grounding the SRX5400 Services Gateway for instructions.

SRX5400 Services Gateway Grounding-Cable Lug Specification

The accessory box shipped with the services gateway includes the cable lug that attaches to the grounding cable (see Figure 7) and two UNC 1/4–20 screws used to secure the grounding cable to the grounding points.

Figure 7: Grounding Cable LugGrounding Cable Lug
CAUTION:

Before services gateway installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the services gateway.

Note:

The same cable lug is used for the DC power cables.