Esd Jack; Grounding - Huawei SmartAX MA5600T Hardware Description

SmartAX MA5600T/MA5603T/MA5608T Multi-service
Access Module
Hardware Description

2.1.6 ESD Jack

The ESD jack of the ETSI subrack is on the left of the fan tray, which is used to connect the
ESD wrist strap to prevent device damage caused by electrostatic discharge.
The position of the ETSI subrack ESD jack, as shown in
Figure 2-4 Position of the ETSI subrack ESD jack

2.1.7 Grounding

This topic describes the grounding principle of the ETSI subrack and the position of the
ground point.
Connect the ground cables properly to guarantee protection against lightening and
interference for the ETSI subrack. When a Huawei cabinet is installed, the service subrack is
grounded through mounting ears and therefore no separate ground cables are required. When
a third-party cabinet is installed, the separate ground cable needs to be connected to the
service subrack and ground point on the cabinet.
The power input end of the ETSI subrack has a noise filter. The center ground of the noise
filter connects to the subrack, called the subrack ground, that is, the protection ground.
Ground the subrack securely so that the influence electricity, leakage electricity can flow to
the ground, improving the protection against electromagnetic interference.
Use a ground cable to connect the ground point of the subrack to the ground bar of the
telecommunications room or to the ground directly. It is recommended that the grounding
resistance of the telecommunications room should be less than 10 ohms. Refer to the local
standards to ground the subrack.
Issue 24 (2018-07-30)
Commands are executed to adjust fan speed. The levels range from 0 to 6, level 0 being
the lowest speed and level 6 being the highest speed.
NOTICE
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2 Subrack and Chassis
Figure 2-4.
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