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S7700 and S9700 Series Switches Hardware Installation and Maintenance Guide

This document describes hardware installation procedures of the S7700 and S9700 series switches, troubleshooting methods for common hardware faults, and switch maintenance instructions.
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DC Power Supply

DC Power Supply

Power Supply Configuration Without Power Distribution Boxes

Table 5-3, Table 5-4lists the power modules applicable to the S7700 series switches and configurations of the power modules.
Table 5-3  Configurations of the power modules applicable to the S7703, S7706 and S7712 switch

Device Model

Maximum Power Consumption of Chassis

Power Module

System Power Module Configuration

PoE Power Module Configuration (Applicable Only to V200R006C00 and Later Versions)

S7703

1000 W

1600 W DC power module

1+0, 1+1 (recommended)

Inapplicable in PoE power slots

2200 W DC power module

1+0, 1+1 (recommended)

1+0

S7706

2200 W

1600 W DC power module

1+0, 1+1 (recommended)

Inapplicable in PoE power slots

2200 W DC power module

1+0, 1+1 (recommended), 2+0, 2+2

1+0, 1+1, 2+0, 2+2, 3+0, 3+1, 4+0

S7712

4200 W

1600 W DC power module

1+0, 1+1 (recommended)

Inapplicable in PoE power slots

2200 W DC power module

1+0, 1+1, 2+0, 2+2 (recommended)

1+0, 1+1, 2+0, 2+2, 3+0, 3+1, 4+0

Table 5-4  Configurations of the power modules applicable to the S7703 PoE and S7706 PoE switch

Device Model

Maximum Power Consumption of Chassis

Power Module

Power Module Configuration

S7703 PoE

1185 W (without PoE power supply)

2200 W DC power module

1+0, 1+1, 2+0, 2+1, 3+0

S7706 PoE

2640 W (without PoE power supply)

2200 W DC power module

1+0, 1+1, 2+0, 2+1, 2+2, 3+0, 3+1, 3+2, 3+3, 4+0, 4+1, 4+2, 4+3, 4+4, 5+0, 5+1, 6+0, 6+1, 7+0, 7+1, 8+0

Table 5-5 lists the power modules applicable to the S9700 series switches and configurations of the power modules.
Table 5-5  Configurations of the power modules applicable to the S9700 series switches

Device Model

Maximum Power Consumption of Chassis

Power Module

Power Module Configuration

S9703

1185 W

2200 W DC power module

1+0, 1+1 (recommended)

S9706

2640 W

2200 W DC power module

1+0, 1+1, 2+0, 2+1 (recommended), 2+2

S9712

4906 W

2200 W DC power module

1+0, 1+1, 2+0, 2+1, 2+2, 3+0, 3+1 (recommended), 3+3, 4+0, 4+1

The following figures show the full configurations of power modules in a switch.

NOTE:
  • If the PoE function is not required or supported, you do not need to configure PoE power modules or the matching power distribution boxes. Determine the number of PoE power modules according to your needs.
  • In versions earlier than V200R006C00, only 800 W and 2200 W AC power modules can be used as PoE power modules. In V200R006C00 and later versions, 2200 W DC power modules, 800 W AC power modules, and 2200 W AC power modules can all be used as PoE power modules. In V200R012C00 and later versions, 2200 W DC power modules, 800 W AC power modules, 2200 W AC power modules, and 3000 W AC power modules can all be used as PoE power modules.
  • The S7703 PoE and S7706 PoE chassis do not have independent PoE power slots. They can provide PoE power after a power module is installed in a power slot and a PoE-supported card is installed. When the PoE function of a chassis is used, the sum of the PoE power and system power is the total output power of the chassis. You can run the display poe power and display power system commands to view the PoE power on interfaces and the system power of the chassis, respectively.

  • As shown in Figure 5-5:

    • Two system power modules of the S7703/S7706/S7712/S9700 work in 1+1 redundancy mode.

    • In V200R006C00 and later versions, one 2200 W DC PoE power module on the S7700 works in 1+0 mode.

    Figure 5-5  1+1 redundancy of power modules
  • Figure 5-6 shows the 2+2 redundancy of power modules.
    • Two system power modules of the S7703/S7706/S7712/S9700 work in 2+2 redundancy mode.

    • In V200R006C00 and later versions, one 2200 W DC PoE power module on the S7700 works in 2+2 mode.

    Figure 5-6  2+2 redundancy of power modules
  • (Only for S9712) Figure 5-7 shows the 3+3 redundancy of power modules.
    Figure 5-7  3+3 redundancy of power modules
Table 5-6 describes the requirements for DC power distribution
Table 5-6  Requirements for DC power distribution

Power Module

Technical Specifications

Power Cable Cross-Sectional Area

Maximum Power Supply Distance

Number of Inputs

Circuit Breaker Rated Current

Output Terminal Type on Power Distribution Device

1600 W DC power module (S7703/S7706/S7712)

  • Rated input voltage: -48 V DC/-60 V DC
  • Input voltage range: -38.4 V DC to -72 V DC
  • Maximum input current: 40 A
  • Maximum output current: 40 A

6 mm2

11 m

Equal to the number of power modules

The required rated current varies on different product models:

  • S7703: ≥ 20 A
  • S7706&S7712: ≥ 40 A

OT terminals or cord end terminals. To use other types of terminals, purchase the terminals and prepare cables onsite.

16 mm2

29 m

2200 W DC power module (S7700&S9700)

  • Rated input voltage: -48 V DC/-60 V DC
  • Input voltage range: -40 V DC to -72 V DC
  • Maximum input current: 60 A
  • Maximum output current: 42 A

10 mm2

14 m

Equal to the number of power modules

≥ 60 A

OT terminals or cord end terminals. To use other types of terminals, purchase the terminals and prepare cables onsite.

16 mm2

23 m

25 mm2

36 m

  • Each DC power module must be connected to an independent circuit breaker.

  • The current rating of the circuit breaker cannot be smaller than the maximum current allowed by the power cable.

NOTE:
  • Select appropriate power cables according to the power supply distances. If the required power supply distance exceeds the maximum power supply distance, use power distribution boxes. The power supply distance is the cable length between the power distribution frame and power modules.

  • When using the N+N redundancy mode, equally divide the power modules into two groups and connect the two groups of power modules to two independent power supply systems. This configuration provides redundancy of power supply systems to enhance system reliability.
  • The current rating of the upper-level circuit breaker cannot be smaller than the maximum current allowed by the power cable.

Power Supply Configuration with Power Distribution Boxes

Table 5-7, Table 5-8 lists the power modules applicable to the S7700 series switches and configurations of the power modules.
Table 5-7  Configurations of the power modules applicable to the S7703, S7706 and S7712 switch

Device Model

Maximum Power Consumption of Chassis

Power Distribution Box

Power Module

System Power Module Configuration

PoE Power Module Configuration (Applicable Only to V200R006C00 and Later Versions)

S7703

1000 W

1600 W DC power distribution box

1600 W DC power module

1+0, 1+1 (recommended)

Inapplicable in PoE power slots

2200 W DC power distribution box

2200 W DC power module

1+0, 1+1 (recommended)

1+0
S7706

2200 W

1600 W DC power distribution box

1600 W DC power module

1+0, 1+1 (recommended)

Inapplicable in PoE power slots

2200 W DC power distribution box

2200 W DC power module

1+0, 1+1 (recommended), 2+0, 2+2

1+0, 1+1, 2+0, 2+2, 3+0, 3+1, 4+0

S7712

4200 W

1600 W DC power distribution box

1600 W DC power module

1+0, 1+1 (recommended)

Inapplicable in PoE power slots

2200 W DC power distribution box

2200 W DC power module

1+0, 1+1, 2+0, 2+2 (recommended)

1+0, 1+1, 2+0, 2+2, 3+0, 3+1, 4+0

Table 5-8  Configurations of the power modules applicable to the S7703 PoE and S7706 PoE switch

Device Model

Maximum Power Consumption of Chassis

Power Distribution Box

Power Module

Power Module Configuration

S7703 PoE

1185 W (without PoE power supply)

2200 W DC power distribution box

2200 W DC power module

1+0, 1+1, 2+0, 2+1, 3+0

S7706 PoE

2640 W (without PoE power supply)

2200 W DC power distribution box

2200 W DC power module

1+0, 1+1, 2+0, 2+1, 2+2, 3+0, 3+1, 3+2, 3+3, 4+0, 4+1, 4+2, 4+3, 4+4, 5+0, 5+1, 6+0, 6+1, 7+0, 7+1, 8+0

Table 5-9 lists the power modules applicable to the S9700 series switches and configurations of the power modules.
Table 5-9  Configurations of the power modules applicable to the S9700 series switches

Device Model

Maximum Power Consumption of Chassis

Power Distribution Box

Power Module

Power Module Configuration

S9703

1185 W

2200 W DC power distribution box

2200 W DC power module

1+0, 1+1 (recommended)

S9706

2640 W

2200 W DC power distribution box

2200 W DC power module

1+0, 1+1, 2+0, 2+1 (recommended), 2+2

S9712

4906 W

2200 W DC power distribution box

2200 W DC power module

1+0, 1+1, 2+0, 2+1, 2+2, 3+0, 3+1 (recommended), 3+3, 4+0, 4+1

The following figures show the full configurations of power modules in a switch.

NOTE:
  • If more than one power module is installed in a switch, you can connect the power modules to the same power source or different power sources. It is recommended that you connect the power modules to different power sources to improve power reliability.

  • If the PoE function is not required or supported, you do not need to configure PoE power modules or the matching power distribution boxes. Determine the number of PoE power modules according to your needs.
  • In versions earlier than V200R006C00, only 800 W and 2200 W AC power modules can be used as PoE power modules. In V200R006C00 and later versions, 2200 W DC power modules, 800 W AC power modules, and 2200 W AC power modules can all be used as PoE power modules. In V200R012C00 and later versions, 2200 W DC power modules, 800 W AC power modules, 2200 W AC power modules, and 3000 W AC power modules can all be used as PoE power modules.
  • The S7703 PoE and S7706 PoE chassis do not have independent PoE power slots. They can provide PoE power after a power module is installed in a power slot and a PoE-supported card is installed. When the PoE function of a chassis is used, the sum of the PoE power and system power is the total output power of the chassis. You can run the display poe power and display power system commands to view the PoE power on interfaces and the system power of the chassis, respectively.

  • As shown in Figure 5-8:

    • When a 1600 W DC power distribution box is used, two system power modules of the S7703/S7706/S7712 work in 1+1 redundancy mode.

    • In V200R006C00 and later versions, one 2200 W DC PoE power module on the S7703/S7706/S7712 works in 1+0 mode.

    Figure 5-8  1600 W DC power distribution box and 1+1 redundancy of DC power modules (different power sources)

    As shown in Figure 5-9:

    • When a 1600 W DC power distribution box is used, two system power modules of the S7703/S7706/S7712 work in 1+1 redundancy mode. If a single power input can provide the maximum power required by the switch connected to the power distribution box, the two power modules can connect to the same power source.

    • 1+0 configuration of 2200 W DC PoE power module on the S7703/S7706/S7712 in V200R006C00 and later versions

    Figure 5-9  1600 W DC power distribution box and 1+1 redundancy of DC power modules (same power source)
  • As shown in Figure 5-10:

    • When a 2200 W DC power distribution box is used, two system power modules of the S7703/S7706/S7712/S9700 work in 1+1 redundancy mode.

    • In V200R006C00 and later versions, one 2200 W DC PoE power module on the S7703/S7706/S7712 works in 1+0 mode.

    Figure 5-10  2200 W DC power distribution box and 1+1 redundancy of DC power modules (different power sources)
  • As shown in Figure 5-11:

    • When a 2200 W DC power distribution box is used, two system power modules of the S7703/S7706/S7712/S9700 work in 1+1 redundancy mode. If the equipment room does not have many power sources but has 126 A circuit breakers, the two power modules can be connected to the same power source. The power input line can be split into two in the power distribution box using a short-circuiting bar.

    • In V200R006C00 and later versions, one 2200 W DC PoE power module on the S7703/S7706/S7712 works in 1+0 mode.

    NOTE:
    • To use a single power input for the two power modules, ensure that the rated current of the circuit breaker connected to the power modules is larger than 126 A and the circuit breaker must be connected to a 35 mm2 power cable.
    • Redundant input and output terminals on the power distribution box can be left for future use.
    Figure 5-11  2200 W DC power distribution box and 1+1 redundancy of DC power modules (same power source)
  • As shown in Figure 5-12:

    • When a 2200 W DC power distribution box is used, four system power modules of the S7703/S7706/S7712/S9700 work in 2+2 redundancy mode.

    • In V200R006C00 and later versions, four 2200 W DC PoE power modules on the S7703/S7706/S7712 work in 2+2 redundancy mode.

    Figure 5-12  2200 W DC power distribution box and 2+2 redundancy of DC power modules (different power sources)
  • As shown in Figure 5-13:

    • When a 2200 W DC power distribution box is used, four system power modules of the S7703/S7706/S7712/S9700 work in 2+2 redundancy mode. If the equipment room does not have many power sources but has 126 A circuit breakers, the power modules can be connected to the same power source. The power input line can be split into two in the power distribution box using a short-circuiting bar.

    • In V200R006C00 and later versions, four 2200 W DC PoE power modules on the S7703/S7706/S7712 work in 2+2 redundancy mode.

    NOTE:
    • To use a single power input for the two power modules, ensure that the rated current of the circuit breaker connected to the power modules is larger than 126 A and the circuit breaker must be connected to a 35 mm2 power cable.
    • Redundant input and output terminals on the power distribution box can be left for future use.
    Figure 5-13  2200 W DC power distribution box and 2+2 redundancy of DC power modules (same power source)
  • (Only for S9712) Figure 5-14 shows the power distribution system with a 2200 W DC power distribution box and 3+3 redundancy of DC power modules.
    Figure 5-14  2200 W DC power distribution boxes and 3+3 redundancy of DC power modules
Generally, the internal power cables between power distribution boxes and cabinets are installed beforehand. Use the power cables delivered with DC power modules of the switch as the internal power cables. The external power cables between power distribution boxes and power distribution frames need to be installed onsite. Table 5-10 describes requirements for external power cables.
Table 5-10  Requirements for external power cables

Power Module

Technical Specifications

Power Cable Cross-Sectional Area

Maximum Power Supply Distance (Circuit Breaker Rated Current)

Number of Inputs

Output Terminal Type on Power Distribution Device

2200 W DC power module (S7700/S9700)

  • Rated input voltage: -48 V DC/-60 V DC
  • Input voltage range: -40 V DC to -72 V DC
  • Maximum input current: 60 A
  • Maximum output current: 42 A

16 mm2

18 m (≥ 63 A)

Equal to the number of power modules

OT terminals or cord end terminals. To use other types of terminals, purchase the terminals and prepare cables onsite.

25 mm2

29 m (≥ 63 A)

35 mm2

  • 41 m (≥ 63 A)

  • 20 m (≥ 126 A)

1600 W DC power module (S7703/S7706/S7712)

  • Rated input voltage: -48 V DC/-60 V DC
  • Input voltage range: -38.4 V DC to -72 V DC
  • Maximum input current: 40 A
  • Maximum output current: 40 A

16 mm2

14 m (≥ 80 A)

Equal to the number of power modules

25 mm2

23 m (≥ 80 A)

35 mm2

32 m (≥ 80 A)

  • Each DC power module must be connected to an independent circuit breaker.

  • The current rating of the circuit breaker cannot be smaller than the maximum current allowed by the power cable.

NOTE:
When using the N+N redundancy mode, equally divide the power modules into two groups and connect the two groups of power modules to two independent power supply systems. This configuration provides redundancy of power supply systems to enhance system reliability.
Use of a 1600 W DC Power Distribution Box
Figure 5-15 shows how a 1600 W DC power distribution box is connected to power modules in an S7706 chassis when the power modules work in 1+1 redundancy and require inputs from different power sources.
Figure 5-15  Use of a 1600 W DC power distribution box for 1+1 redundancy of power modules in an S7706 chassis
Use of a 2200 W DC Power Distribution Box
Figure 5-16 shows how a 2200 W DC power distribution box is connected to power modules in an S7706 chassis when the power modules work in 1+1 redundancy and require inputs from different power sources.
Figure 5-16  Use of a 2200 W DC power distribution box for 1+1 redundancy of power modules in an S7706 chassis
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Updated: 2019-05-15

Document ID: EDOC1000069522

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