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Router Installation
is the main antenna, and the right is the auxiliary antenna. The main antenna must
be installed, and the auxiliary antenna may not be installed. Refer to Figure 3-18 for
the diagram of dual-antenna 4G interface sub card.
3.4 (Optional) Install SPD
3.4.1 Install AC Power SPD
The AC power SPD (surge protection device) suppresses the transient overvoltage
caused by lightning inductance shock or other reasons on the power transmission line.
When a SPD is used, the AC power first enters the SPD and then enters the router.
1.Socket
2.Normal
(green)
3.Grounding
detection indicator (red)
4.Power switch
5.Automatic overload protector
3-16
Figure 3-18 Dual-antenna 4G interface sub card
Figure 3-19 The power SPD
Connects the router power.
work
indicator
on: indicates that the circuit is running normally.
Off: indicates that the protection circuit is damaged.
and
polarity
on: indicates the wiring error (the PE is not connected
or the live wire and naught wire are reversely
connected). At this time, check the power supply
circuit.
Turn on or turn off the power.
If the overload occurs, the power is cut off. When the
overload comes to recovery, the power resets
MP3900X Series Router Installation Manual
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