Preparing for installation

H3C Mini Unmanaged Ethernet Switches include the following models:

·     H3C Mini S8G-U (S8G-U).

·     H3C Mini S9-PWR (S9-PWR).

·     H3C Mini S16G-U (S16G-U).

·     H3C Mini S24-U (S24-U).

·     H3C Mini S24G-U (S24G-U).

Safety recommendations

To avoid any equipment damage or bodily injury, read the following safety recommendations before installation. The recommendations do not cover every possible hazardous condition.

·     Do not place the switch near water or in a damp environment. Prevent water or moisture from entering the chassis.

·     Place the switch in a clean environment. Dust buildup on the chassis might result in electrostatic adsorption, which reduces lifespan of the device and can cause communication failure.

·     Keep the air inlet and outlet vents of the switch free of obstruction, and do not stack switches.

·     Make sure the operating voltage is in the required range.

·     Before using the switch, make sure the grounding cable of the switch is correctly connected.

·     Before cleaning the switch, remove the power cord from the switch. Do not clean the switch with a wet cloth or liquid.

·     Do not open the chassis while the switch is operating.

·     To avoid damage caused by improper operation, do not open the chassis even if the switch is powered off.

 

	NOTE: The switch is a class-A device and might cause electromagnetic interference (EMI). Take actions to prevent EMI when necessary.

 

Installing the switch

Table 1 Mounting options available for the switch

Switch model	Rack mounting	Workbench mounting	Wall mounting
S8G-U	Not supported	Supported	Supported
S9-PWR	Not supported	Supported	Supported
S16G-U	Supported	Supported	Not supported
S24-U	Supported	Supported	Not supported
S24G-U	Supported	Supported	Not supported

 

Mounting in a 19-inch rack

No mounting brackets and screws are provided with the switch. Prepare them yourself.

To install the switch in a 19-inch rack:

1.     Verify that the rack is reliably grounded and is stable.

2.     Use screws to attach the mounting brackets to both sides of the chassis.

Figure 1 Attaching mounting brackets to the switch

 

3.     Place the switch on a rack shelf in the rack. Push the switch in until the oval holes in the brackets align with the mounting holes in the front rack posts.

4.     Use screws to secure the mounting brackets to the front rack posts.

Figure 2 Mounting the switch in the rack

 

NOTE: Mounting brackets are used only for securing the switch to the rack. A rack shelf on the rack is required to bear the switch weight.

 

Mounting on a workbench

1.     Verify that the workbench is clean, sturdy, and reliably grounded.

2.     Place the switch bottom up, and clean the four recessed areas in the chassis bottom with a soft and dry cloth.

3.     Attach the rubber feet to the recessed areas.

4.     Place the switch upside up on the workbench.

Mounting on a wall

You can use pan-head screws and the mounting holes in the switch bottom to mount the switch on a wall.

No screws and screw anchors are provided with the switch. Prepare them yourself. The following figure shows the screw and screw anchor of the recommended size.

Figure 3 Screw and screw anchor of the recommended size (mm)

 

To mount the switch on a wall:

1.     Determine the hole diameter and depth based on the screw and screw anchor size. Make sure the screw anchor can be inserted into the hole and seated flush with the wall and the screw can be fastened securely into the anchor.

If you use screws and screw anchors of the recommended size, the hole diameter is 5 mm (0.20 in).

2.     Drill two holes spacing 90 mm (3.54 in) on the wall. Make sure the two holes are on a horizontal line.

3.     Fasten a screw anchor into each hole and make sure the anchor is flush with the wall.

4.     Insert a screw into each anchor, leaving a minimum of 2.5 mm (0.10 in) between the screw head and wall for mounting the switch

5.     Align the two mounting holes in the switch bottom with the screws and hang the switch on the screws.

Figure 4 Mounting the switch on a wall

 

Connecting cables

Connecting the grounding cable

 

CAUTION: Correctly connecting the grounding cable is crucial to lightning protection and EMI protection.

 

The switch is not provided with a grounding cable. Prepare one yourself.

To connect the grounding cable:

1.     Use a Phillips screwdriver to remove the grounding screw from grounding hole in the rear panel of the chassis. Use the grounding screw to attach the ring terminal of the grounding cable to the grounding hole. Fasten the grounding screw into the grounding hole.

2.     Use needle-nose pliers to make a loop at the other end of the cable.

3.     Remove the hex nut from a grounding post on the grounding strip. Attach the loop to the grounding post and fasten the hex nut.

Figure 5 Connecting the grounding cable

 

Connecting the power cord

Connecting the AC power cord

The S16G-U, S24-U, and S24G-U switches support AC power input.

To connect the AC power cord:

1.     Make sure the switch is reliably grounded.

2.     Connect one end of the AC power cord to the AC power receptacle on the switch.

3.     Connect the other end of the AC power cord to an AC power source.

Connecting a power adapter

The S8G-U and S9-PWR switches support power input by using a power adapter.

To connect the power adapter:

1.     Connect the power cord to the power adapter.

This step is not required for an S8G-U switch.

2.     Connect the DC connector of the power adapter to the DC power receptacle on the switch.

3.     Connect the plug of the power adapter to an AC power source.

Figure 6 Connecting a power adapter

 

Appendix A Chassis views and technical specifications

Chassis views

Front panel

Figure 7 S8G-U front panel

 

Figure 8 S9-PWR front panel

 

Figure 9 S16G-U front panel

 

Figure 10 S24-U front panel

 

Figure 11 S24G-U front panel

(1) Power LED (Power)
(2) 10/100/1000Base-T copper port status LED
(3) Uplink port status LED
(4) 10/100Base-TX copper port status LED
(5) PoE status LED	(6) PoE-MAX LED
(7) 10/100/1000Base-T copper port	(8) DIP switch
(9) 10/100Base-TX copper port

 

	NOTE: The three-position DIP switch can shift the switch functions as follows: ·     标准交换—Enable flow control and downshift. ·     网络克隆—Disable flow control and enable downshift. ·     汇聚上联—Enable flow control, downshift, and uplink port aggregation. (Ports 15 and 16 on the S16G-U and ports 23 and 24 on the S24G-U are uplink ports.)

 

Rear panel

Figure 12 S8G-U rear panel

 

Figure 13 S9-PWR rear panel

 

Figure 14 S16G-U/S24-U/S24G-U rear panel

(1) Security slot	(2) 10/100/1000Base-T copper port
(3) DC power receptacle	(4) 10/100Base-TX copper port
(5) 100Base-TX copper port (uplink port)
(6) Grounding screw	(7) AC power receptacle

 

Technical specifications

Table 2 Technical specifications (1)

Item	S8G-U	S9-PWR		S16G-U
Dimensions (H × W × D)	27 × 158 × 105 mm (1.06 × 6.22 × 4.13 in)	27 × 235 × 105 mm (1.06 × 9.25 × 4.13 in)		44 × 330 × 173 mm (1.73 × 12.99 × 6.81 in)
Weight	≤ 0.4 kg (0.88 lb)	≤ 0.5 kg (1.10 lb)		≤ 1.4 kg (3.09 lb)
Port	8 × 10/100/ 1000Base-T copper port	8 × 10/100Base-TX copper port 1 × 100Base-TX copper port (uplink port)		16 × 10/100/1000 Base-T copper port
PoE power supply	Not supported	Supported by ports 1 through 8. A maximum PoE power capacity of 30 W per port		Not supported
Power consumption (static)	0.5 W	2 W		7.8 W
Power consumption (full configuration)	≤ 4 W	≤ 70 W		≤ 11 W
Cooling system	Natural cooling
Input voltage	DC: 12 V/0.5 A		DC: 54 V/1.48 A	AC: 100 VAC to 240 VAC @ 50 Hz or 60 Hz
Port specifications	RJ-45 connector Half/full duplex, auto-negotiation, MDI/MDI-X
Overall leakage current	GB4943.1
Operating temperature	0°C to 40°C (32°F to 104°F)
Operating relative humidity	5% RH to 95% RH, noncondensing
Fire resistance compliance	GB4943.1

 

Table 3 Technical specifications (2)

Item	S24-U	S24G-U
Dimensions (H × W × D)	44 × 330 × 173 mm (1.73 × 12.99 × 6.81 in)	44 × 330 × 173 mm (1.73 × 12.99 × 6.81 in)
Weight	≤ 1.5 kg (3.31 lb)	≤ 1.6 kg (3.53 lb)
Port	24 × 10/100Base-TX copper port	24 × 10/100/1000Base-T copper port
PoE power supply	Not supported	Not supported
Power consumption (static)	3.7 W	7.8 W
Power consumption (full configuration)	≤ 9 W	≤ 16.5 W
Cooling system	Natural cooling
Input voltage	AC: 100 VAC to 240 VAC @ 50 Hz or 60 Hz
Port specifications	RJ-45 connector Half/full duplex, auto-negotiation, MDI/MDI-X
Overall leakage current	GB4943.1
Operating temperature	0°C to 40°C (32°F to 104°F)
Operating relative humidity	5% RH to 95% RH, noncondensing
Fire resistance compliance	GB4943.1

 

Appendix B LEDs

LED	Status	Description
Power LED (power)	Steady green	The switch is powered on and the power module is operating correctly.
	Off	The switch is not powered on or the power module is faulty.
Uplink port status LED on the S9-PWR switch	Steady green	A 100-Mbps link is present.
	Flashing green	The port is receiving or sending data at 100 Mbps.
	Off	No link is present.
10/100 Base-TX copper port status LED (Link/Act)	Steady green	A 10/100-Mbps link is present.
	Flashing green	The port is receiving or sending data at 10/100 Mbps.
	Off	No link is present.
10/100/1000Base-T copper port status LED (Link/Act)	Steady green	A 1000-Mbps link is present.
	Flashing green	The port is receiving or sending data at 1000 Mbps.
	Steady yellow	A 10/100-Mbps link is present.
	Flashing yellow	The port is receiving or sending data at 10/100 Mbps.
	Off	No link is present.
PoE-MAX LED on the S9-PWR switch	Steady yellow	The switch PoE power is in the protection range 58 W to 64 W.
	Off	The switch PoE power does not reach the protection range
PoE status LED on the S9-PWR switch	Steady yellow	Normal PoE power supply.
	Flashing yellow	Abnormal PoE power supply.
	Off	No PoE power supply.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Website: http://www.h3c.com.hk

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