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Remote Electrical Downtilt System Handbook Section 2– Teletilt

RET System Components in Detail

Bulletin 639519 • Revision D May 2009 2-5

2.4 Lightning Protection Unit

The lightning protection unit, ATLP200-001, is recommended

to provide added surge protection to any RET device, es-

pecially rack mount controllers. This unit must be grounded

using the 602299 grounding kit. It has 8–Pin male and female

interfaces to feed data and power through the AISG compliant

RET control cable. See Figure 2-7.

2.5 RET Cable Grounding Kit

As part of a system, RET cabling requires grounding and

line protection at the bottom of the tower with the use of an

ATLP200-001 lightning protection unit or ATJB200-A01 series

junction box. Andrew also recommends the use of the ATGK-001

grounding kit for every 60m of AISG RET control cable run.

The ATGK-001 grounding kit is designed to capture and

ground the cables at the junction where two cables are daisy-

chained. This means that for a 120 m run, you will use two 60

m cables (ATCB-B01-060) with the ATGK-001 grounding kit

in the middle. Kit includes a clamp module, a ground cable,

and hardware for connection to the main ground bus.

Note: AISG control systems need to be grounded at

one of these locations:

1. On the top of the site, grounding either the top SBT,

TMA, junction box, or using the ATGK-001 RET

cable grounding kit.

2. At the bottom of the site, grounding either the bot-

tom SBT, junction box, lightning protection box, the

dc 2.1 bias tee, or using the ATGK-001 RET cable

grounding kit.

3. Grounding every 60 m for the cable length using

the ATGK-001 RET cable grounding kit.

2.6 RET Equipment Grounding Kit

The 602299 grounding kit provides grounding of a RET

component, e.g. controller, lightning protection box, junction

box, smart bias tee, etc.

Figure 2-7. ATLP200-001

Lightning Protection Unit.

Figure 2-8. ATGK-001

RET Control Cable Grounding Kit.

Figure 2-9. 602299

RET Equipment Grounding Kit.

Grounding

Lug

Grounding

Cable

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