Product overview·· 1

Physical architecture· 1

S12504 chassis view·· 2

S12508 chassis views 4

S12518 chassis views 6

Backplane· 8

Fan tray· 8

Power supply system·· 9

AC power supply· 10

DC power supply· 13

 

The H3C S12500 Routing Switch Series includes the models in Table 1.

Table 1 S12500 models

Model	MPU slots	LPU slots	Switching fabric module slots
S12504-AC	2	4	4
S12504-DC	2	4	4
S12508-AC	2	8	9
S12508-DC	2	8	9
S12518-AC	2	18	9
S12518-DC	2	18	9

 

NOTE: ·       The line processing unit (LPU) slots are for both Ethernet interface cards and OAA cards. For card specifications, see "Appendix A Technical specifications." ·       Unless otherwise specified, the configuration and installation procedures in this document apply to all S12500 switches.

 

Physical architecture

The DC power supply and the AC power supply of a chassis look the same.

The diagrams in this guide are for illustration only.

S12504 chassis view

Figure 1 S12504 front view

(1) MPU slots (slots 0 to 1)	(2) LPU slots (slots 2 to 5)	(3) Power frame cover
(4) Power switch cover	(5) ESD-preventive wrist strap port

 

NOTE: The power frame cover protects the power frame air filter and the power frame slots.

 

Figure 2 S12504 rear view

(1) Fan tray	(2) Power entry module (PEM)	(3) Grounding screw
(4) Ventilation panel	(5) ESD-preventive wrist strap port	(6) Switching fabric module slots (slots 6 to 9)

 

The S12504 chassis has the following slots and components:

·           Two MPU slots and four LPU slots at the front, and four switching fabric module slots at the rear.

·           One power frame, at the bottom of the chassis, can accommodate up to six power supplies.

·           One vertically oriented fan tray at the rear of the chassis. For the ventilation direction inside the chassis, see "Preparing for installation."

S12508 chassis views

Figure 3 S12508 front view

(1) Power frame cover	(2) Upper cabling rack	(3) MPU slots (slots 0 and 1)
(4) Lower cabling rack	(5) Chassis air intake vents	(6) ESD-preventive wrist strap port
(7) LPU slots (slots 2 to 9)	(8) Power switch cover

 

NOTE: The power frame cover protects the power frame air filter and the power frame slot. See "Power supply system."

 

Figure 4 S12508 rear view

(1) Power entry module (PEM)	(2) Upper fan tray
(3) Lower fan tray	(4) Ventilation panel
(5) Grounding screw	(6) ESD-preventive wrist strap port
(7) Switching fabric module slots (slots 10 to 18)	(8) Chassis air exhaust vents
(9) Power supply air exhaust vents

 

The S12508 chassis has the following slots and components:

·           Two MPU slots and eight LPU slots at the front, and nine switching fabric module slots at the rear.

·           One power frame, at the top of the chassis, can accommodate up to six power supplies.

·           Two horizontally oriented fan trays at the rear of the chassis. For the ventilation direction inside the chassis, see "Preparing for installation."

S12518 chassis views

Figure 5 S12518 front view

(1) Power frame cover	(2) Upper cabling rack	(3) MPU slots (slots 0 and 1)
(4) LPU slots (slots 2 to 19)	(5) Lower cabling rack	(6) Chassis air intake vents
(7) ESD-preventive wrist strap port	(8) Power switch cover

 

Figure 6 S12518 rear view

(1) Power entry modules (PEMs)	(2) Upper fan tray
(3) Switching fabric module slots (slots 20 to 28)	(4) Lower fan tray
(5) Ventilation panel	(6) Grounding screw
(7) ESD-preventive wrist strap port	(8) Chassis air exhaust vents
(9) Power supply air exhaust vents

 

The S12518 chassis has the following slots and components:

·           Two MPU slots and 18 LPU slots at the front, and nine switching fabric module slots at the rear.

·           Two power frames at the top, and each power frame can accommodate up to six power supplies.

·           Two horizontally oriented fan trays at the rear. For the ventilation direction inside the chassis, see "Preparing for installation."

Backplane

The backplane of an S12500 switch is located inside the chassis. It provides high-speed data switching between switching fabric modules and LPUs, and exchanges management and control signals between MPUs and LPUs/switching fabric modules. The backplane provides the following capabilities:

·           Provides communication channels for signal exchange between cards.

·           Supports hot-swapping of cards.

·           Identifies card type.

·           Connects to the power frame, provides distributed power for MPUs, LPUs, switching fabric modules, fan trays and power supplies, and provides monitoring channels for MPUs to monitor power frame status.

Fan tray

A fan tray contains fan units. The dimension of each fan unit is 120 × 120 × 38 mm (4.72 × 4.72 ×1.50 in).

An S12504 uses one fan tray, which comprises eight fan units and one fan monitoring board.

An S12508 or S12518 uses an upper fan tray at the top and a lower fan tray at the bottom. Each fan tray comprises 12 fan units and one fan monitoring board.

S12500 fan trays provide the following functions:

·           Effective heat dissipation and single-point of failure protection.

·           Status monitoring, including fan rotation speed monitoring and fault alarming.

·           Fan speed can be controlled by the MPU or automatically adjusted based on temperature. An S12504 has two groups of fans. An S12508 or S12518 has four groups of fans. Speed adjustment is done on a per-group basis to decrease noise and improve energy efficiency.

·           Each fan tray has two LEDs on the front panel to show its operating status.

·           Hot swappable. The fans receive DC power from the backplane.

 

IMPORTANT: The S12504, S12508, and S12518 use different fan trays, which cannot be replaced by one another.

 

Figure 7 shows the S12504 fan tray, and Figure 8 shows the S12508 fan tray. The S12508 fan tray and S12518 fan tray look similar.

Figure 7 S12504 fan tray

 

Figure 8 S12508 fan tray

 

Table 2 Fan LED description

LED	Status	Description
RUN	Off	The fan tray has failed.
	Flashing	The fan tray is operating properly.
ALM	Off	The fan tray is in a normal state.
	Flashing	The fan tray is faulty.
	Steady on	The fan tray is faulty.

 

Power supply system

The S12500 switches provide both AC powered chassis and DC powered chassis. You can select the type of power supply system and the number of power supplies as needed. The following takes the power frame for the S12508 as an example.

Figure 9 Power frame appearance (without any power supply)

 

AC power supply

The AC-powered chassis of the S12500 switches use the PSE9000-A1 AC power supply system, which comprises an AC power frame, a power monitoring module, a power entry module (PEM), and up to six power supplies.

AC power frame

Each AC power frame can have one power monitoring module and up to six AC power supplies.

Figure 10 Front view of an AC power frame

(1) to (6) AC power supplies (the serial numbers are identical to the slot numbers)
(7) Power monitoring module	(8) Power monitoring module LED	(9) Power frame switch

 

Table 3 Power monitoring module LED description

LED	Status	Description
RUN	Steady on	The power monitoring module is operating properly.
	Off	The power monitoring module is faulty.
MAJOR	Steady on	·       At least one power supply is faulty. ·       All power supplies have been removed from the power frame. ·       The switch of the power frame is off. ·       Power supplies are in position, but no AC power supply is provided.
	Turns on and then goes off	A power supply is being inserted or removed.
	Off	The power supplies are operating properly.
MINOR	Off	Reserved

 

AC power supply

·           The AC power supplies are hot-swappable.

·           The power supply fans draw in fresh air from the front and exhaust warm air out of the rear.

·           Multiple AC power supplies work in N+1 or N+M redundancy and support load balancing.

Figure 11 AC power supply

(1) Power input LED	(2) Power output LED	(3) Over-temperature alarm LED
(4) Power supply fault LED

 

Table 4 AC power supply LED description

LED	Status	Description
Input	Steady on	Power is being correctly input.
	Off	No power is being input.
	Flashing	Input power exceeds the threshold.
Output	Steady on	Power is being correctly output.
	Off	No power is being output.
	Flashing	The power output is overloaded.
Service	Steady on	The AC power supply is experiencing an over-temperature condition.
	Off	The AC power supply is operating properly.
Fault	Steady on	The AC power supply is faulty.
	Off	The AC power supply is operating properly.

 

Table 5 AC power supply specifications

Item	Description
Rated input voltage range	100 VAC to 120 VAC/200 VAC to 240 VAC @ 50 Hz or 60 Hz
Max input voltage range	90 VAC to 264 VAC @ 47 Hz to 63 Hz
Max input current	13.3 A
Max output power	2000 W at 200 VAC to 240 VAC input 1200 W at 100 VAC to 120 VAC input

 

Power monitoring module

The power monitoring module (callout 7 in Figure 10) monitors the alarm status, in-position status, and operating status of the power supplies in real time. It is located between the power supply slot area and the power switch.

PEM

The PEM (see Figure 12) provides power to the power supplies.

Figure 12 PEM location

 

Table 6 PEM description

PEM	Description	Max number of power supplies
LSTM2PEMC6 (PEM-C20)	Applied to the 110 V or 220 V single-phase three-wire AC power supply system. One PEM provides six standalone C20 (16A) sockets numbered in two rows: 1, 3, and 5 in the top row, and 2, 4, and 6 in the bottom row, from left to right.	6 (each C20 socket for one power supply)

 

DC power supply

The DC-powered chassis of the S12500 switches use the PSE9000-D DC power supply system, which comprises a DC power frame, a power monitoring module, and up to six DC power supplies.

DC power frame

Each DC power frame can have one power monitoring module and up to six DC power supplies.

Figure 13 DC power frame front view

(1) to (6) DC power supplies
(7) Power monitoring module	(8) Power monitoring module LEDs	(9) Power frame switch

 

Table 3 describes the LED behaviors of the power monitoring module.

A DC power frame has six pairs of wire posts corresponding to power supplies 1 to 6, and one grounding post. The external DC power system supplies power through the six pairs of wire posts.

Figure 14 DC power frame rear view

(1) A pair of wire posts

(2) Grounding post

 

DC power supply

Figure 15 DC power supply

(1) Power input LED

(2) Power output LED

(3) Over-temperature alarm LED

(4) Power fault LED

 

NOTE: A DC power supply has the same LED behaviors as an AC power supply. For more information, see Table 4.

 

Table 7 DC power supply specifications

Item	Description
Rated input voltage range	–48 VDC to –60 VDC
Max input voltage range	–42 VDC to –72 VDC
Startup voltage range	–44 VDC to –72 VDC
Max input current	60 A
Max output power	1800 W

 

Power monitoring module

The power monitoring module is vertically installed between the power supply slot area and the power switch. It monitors the alarm status, in-position status, and operating status of the power supplies in real time.