Cisco Aironet 1550 Installation Manual page 56

Installation Guidelines
Figure 2-1
1
Building roof-overhang
2
Shielded outdoor-rated Ethernet
(CAT5e or better) cable
3
Water drip loop
4 6-AWG copper grounding wire
5 Ground rod
1. User supplied.
2. The safety ground wire in the AC power cord must have a ground path to a grounding rod.
3. The shielded Ethernet cable has a ground path through the power injector and the safety ground wire in the AC power cord.
The 1552 access point was designed with consideration for resistance to effects of lightning effects on
Note
the access point electronics. The 1552 access point employs lightning arrestor circuitry on the Ethernet
and power ports. On the input Ethernet port, Gas Discharge Tubes (GDT) are used for the Power Entry
Module (PEM) to mitigate lightning effect. On the AC power, GDTs are also used along with fuses to
mitigate high-current condition. For the DC power, a fuse is used to mitigate high current condition.
While not a common practice, the user may want to consider using lightning protection at the antenna
ports for added protection. To meet EN/IEC60950-22 (Clause 4.2) requirements, the installer must
ensure that additional protection is provided external to this equipment to reduce transient surges from
Overvoltage IV to Overvoltage Category II at the AC power input of the access point. The over-voltage
and fault-current protection components used to achieve this protection must comply with the IEC 61643
Cisco Aironet 1550 Series Outdoor Mesh Access Point Hardware Installation Guide
2-10
Components in a Typical Access Point Installation
9
10
1
1
1
Chapter 2
1
2
8
3
4
7
5
6
6
Ground
2
7
AC power cord
3
8
Power injector
9 Shielded Ethernet (CAT5e or better) cable
10 Controller (through a switch)
Installing the Access Point
1
OL-24247-01