Connecting The Dc-Input Power Cord; Figure 3-3 Dc-Input Power Connector (Partial); Figure 3-4 Rps Dc-Input Connector - Huawei Quidway S3900 Series Installation Manual

Installation Manual
Quidway S3900 Series Ethernet Switches
Caution:
Before powering on the switch, connect the ground wire.

3.2.2 Connecting the DC-Input Power Cord

＋ － NULL ＋ － NULL
+: -48V working ground
NULL: reserved

Figure 3-3 DC-input power connector (partial)

Step 1: Connect one end of the chassis ground wire to the grounding screw on the rear
of the chassis and the other end to the ground as near as possible.
Step 2: Connect DC-input socket.
Connector Connector

Figure 3-4 RPS DC-input connector

(1) As shown in Figure 3-4, first insert two cables into the appropriate holes through
dust-proof shield, and then fix the cables separately by using screws 1 and 2. Make
sure that the positive and negative ends of the cable are inserted appropriately and
accord with silkscreen on the holes.
(2) Fix the dust-proof shield by screws 3 and 4 by using a small flathead screwdriver,
see Figure 3-4.
Screw 2 Screw 2
Screw 1 Screw 1
Screw 3 Screw 3
Cable 1 Dust-proof shield Cable 1 Dust-proof shield
Screw 4 Screw 4
Cable 2 Cable 2
Huawei Technologies Proprietary
3-3
Chapter 3 Installing the Switch
-: -48 to -60 V
Cable tie Cable tie