
5
4000
Installation
2.3
Grounding the Equipment
Warning!
The ATT must be grounded before communication and power connections are
made.
An external grounding lug is provided on the ATT. A connection from the ground lug to
earth ground must be made before any other wiring connections are made.
Note!
For adequate/proper operation of the ATT lightning arrestor, a ground strap must be
attached to the ATT. Grounding through mounting kits or pipe coupling is not ade-
quate.
Note!
Properly seal all ports to prevent moisture or other contamination from entering the
wiring compartment.
2.4
Wiring
Connections should be made in a conventional manner according to local or plant
electric codes.
Warning!
Explosion-proof seals must be installed in all wiring entries. Any unused entries must
be plugged with pipe plugs and secured with Loctite®, or equivalent.
2.4.1
ATT Wiring
Wiring the ATT is described in the following paragraphs. The wiring diagram provided
in Figure 2-3 on page 6 should be used in conjunction with these wiring instructions.
2.4.2
Wiring Preparation
Remove the two thread protectors from the 1/2-inch NPT conduit entries at the top and
bottom of the ATT. Remove the rear cover from the ATT housing.
2.4.3
Connecting Input Power
Warning!
When connecting DC power leads to the ATT, make certain that power is OFF.
The ATT operates on a 24-48 volts DC power source. The input power connection to the
ATT is accomplished in the following manner.
Connect the positive side of the power supply to terminal 10, B+, and the negative side
to terminal 9, B-, of the terminal block assembly. See Figure 2-3 on page 6.
Содержание Network Adapter 4000
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