Honeywell Mercury User Manual page 10

Page 10
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10
8. J5, RJ11 Phone Jack:
For convenience, it is suggested that the instrument
with the integral modem be mounted near a telephone
line drop that is easily suited for installation of an
electrical earth ground. The instrument/modem
assembly must be mounted in a "safe area" (as
opposed to "hazardous area") in accordance with
Mercury Instruments guide lines for modem
installation.
9.
TB2, Grounding Lug:
This terminal provides a direct connection to the
telephone line surge suppression components on the
modem board. It should be connected via a short
length of wire to an enclosure ground terminal located
nearby.
Note: The best protection against lightning surges is a telephone line
surge suppressor (TII) installed at the service terminals.