Grounding; Power Distribution Principle - Huawei SmartAX MA5600T Hardware Description

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

2.5.8 Grounding

This topic describes the grounding principle of the MA5603T chassis and the position of the
ground point.
Connect the ground cables properly to guarantee protection against lightening and
interference for the MA5603T. 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 MA5603T has a noise filter. The center ground of the noise filter
connects to the chassis, called the chassis shell ground, that is, the protection ground. Ground
the chassis shell 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 chassis shell 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 chassis.
The ground point of the chassis shell is on the front of the chassis, as shown in
Figure 2-24 Grounding of the chassis

2.5.9 Power Distribution Principle

The MA5603T chassis adopts DC power supply. This topic describes the power distribution
principle of the MA5603T chassis.
Figure 2-25
NOTE
Figure 2-25 Power distribution principle of the MA5603T chassis
Issue 24 (2018-07-30)
NOTICE
shows the power distribution principle of the MA5603T chassis.
The MA5603T chassis supports -48 V (-38.4 V to -57.6 V)/-60 V (-38.4 V to -72 V) power supply. The
following uses the -48 V as an example.
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2 Subrack and Chassis
Figure 2-24.
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