Campbell Scientific COM220 56k Phone Modem - Manual (Page 16)

COM220 Telephone Modem
3.6 Connecting to a Surge Protector
Campbell Scientific offers two surge protectors (pn 4330 and 6362). The 4330
and 6362 are essentially the same, except that the 6362 has hardware for
mounting to an enclosure backplate.
The 4330 is also known as the 2374-01.
The 4330 and 6362 have a protector element for each line that consists of a
heavy-duty rated, two-element gas tube, an external, backup gap assembly, and
a switch-grade shorting mechanism. The gas tubes (tip and ring) are sealed in
a fire-resistant plastic body. DC breakdown at 100 V/sec is 300 to 500 V; DC
extinguishing at 52 V, 135 V, and 150 V is less than 150 ms.
FIGURE 3-3 and FIGURE 3-4 show the wiring for connecting the surge
suppressor. Color coding of wires may vary. The important consideration is to
follow tip all the way through and ring all the way through. Getting wires
crossed typically does not damage anything. The phone line just will not work
until the wires are straightened out.
Phone wires are live, typically with low voltage (24 Vdc).
While not harmful in most situations, Campbell Scientific
recommends installing the surge protector in dry weather
only by technicians with a healthy heart.
FIGURE 3-3. Top view of surge-suppressor wiring
NOTE
CAUTION
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