Honeywell ST 3000 Satellite Radio User Manual


 
4.3 Wiring ST 3000 Transmitter, Continued
Approval body
requirements
If your transmitter was ordered with Table III option 3N for self-
declared approval per 94/9/EC (ATEX4), you must use a power supply
that includes a voltage limiting device that will keep the voltage to the
transmitter from exceeding 42 Vdc. You can achieve this by using a
battery as the supply or one of these voltage limiting means.
Double wound mains transformer per BS 3535 or equivalent.
An adequately rated zener diode whose voltage is not significantly
higher than the rated voltage.
An adequately rated semiconductor voltage regulator.
Lightning protection
When your transmitter is equipped with optional lightning protection,
you must connect a wire from the transmitter to ground as shown in
Figure 15 to make the protection effective. We recommend that you use
a size 8 (American Wire Gage) or (8.37mm
2
) bare or green covered
wire.
Figure 15 Ground Connection for Lightning Protection.
Electronics
Housing
Connect to
Earth Ground
Continued on next page
42 ST 3000 Release 300 Installation Guide 2/05