Campbell COM220, Инструкция по эксплуатации, Страница: 13 / 42

COM220 Telephone Modem
FIGURE 3-2. CR10X with CR10 wiring panel and COM220 using
RJ11C telephone jack
3.2 Connecting to Earth Ground
Connect the 14-AWG grounding wire (green with yellow stripe, provided with
the COM220) to the ground terminal (GND) on the COM220 and to the
enclosure’s earth ground connection. If the site does not have a grounded
enclosure, connect the ground wire directly to an earth ground connection. The
datalogger ground should also be tied to the earth ground (see FIGURE 3-1 and
FIGURE 3-2 ).
The modem must be grounded for its transient protection to
work.
CAUTION
14-AWG Ground Wire
Red
(+12V)
14-AWG Ground Wire
(green with yellow stripe)
5