Huawei DBS3900 IBS, Hardware Description, Page: 16 / 28

DRH3980A&3909A&3918A&
3918B&3921A&3921B&3926A
Hardware Description
3 DRH Cables
Issue DraftA (2013-08-10) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd..
10
3.2 DRH PGND Cable
An DRH PGND cable connects an DRH and a ground bar, ensuring the proper grounding of
the DRH. The maximum length of the DRH PGND cable is 8 m (26.25 ft).
Exterior
An DRH PGND cable is green or green and yellow with a cross-sectional area of 16 mm
2
(0.025 in.
2
). This cable has an OT terminal at each end. Figure 3-1 shows an DRH PGND
cable.
Figure 3-1 PGND cable
(1) OT terminal (M6, 16 mm
2
or 0.025 in.
2
) (2) OT terminal (M8, 16 mm
2
or 0.025 in.
2
)

If the customer prepares the PGND cable, a copper-core cable with a cross-sectional area of 16 mm
2
(0.025 in.
2
) or larger is recommended.
 One OT terminal must be added to each end of the PGND cable onsite.
 You can determine the color of the cable and whether to use corresponding two-hole OT terminals
based on local regulations.
Figure 3-2 shows a two-hole OT terminal.
Figure 3-2 Two-hole OT terminal
3.3 DRH Power Cable
The DRH power cable is a -48 V DC shielded cable. It feeds -48 V DC power to an DRH. The
default length of an DRH power cable is 50 m (164.04 ft).