Owner's manual

Table Of Contents

T107 Weather Station

2. Connect the modem 9-pin port to the ET Enclosure CS I/O port with the

pn 10588 ribbon cable supplied with the ET Enclosure (see FIGURE 2-23

and FIGURE 2-24).

3. Connect the modem RJ-11 jack to the ET Enclosure RJ-11 jack with the

RJ-11 patch cord (see FIGURE 2-24).

4. Connect the modem ground terminal block (GND) to the ET Enclosure

ground with the 14 AWG ground wire.

2.5.2.2 External Installation

The following modem kit components are used to make the external

connections:

(1) Direct Burial Splice Kit

(1) 20 foot Telephone Patch Cord with Connector

1) Connect the 20 foot patch cord to connector marked COM on the external

back panel, under the protective cover.

It’s very important that each plug is completely seated on to the

connector and the locking ring turned 1/4 revolution clockwise.

Failure to seat the plug completely could cause corrosion and

water damage to both the enclosure and the sensor cable.

2) Splice the labeled “Tip” and “Ring” lines of the patch cord to the

telephone service line. Use the direct burial splice kit when splices are in a

valve box or buried.

The splice and wire nut must be completely immersed into the

silicon gel inside the splice tube to be waterproof.

2.5.3 Short-Haul Modem

Short-haul modems enable communication between a datalogger and computer

over two twisted pairs of wires. The maximum distance between modems is

determined by baud rate and wire gauge. At 9600 baud, the approximate

maximum cable length is 6.0 miles using 19 AWG cable. DCE / DTE switches

on the modems are set to DCE.

It’s critical to use at least a two twisted-pair cable with a shield

wire. Shield wire(s) and/or any additional unused conductors must

connect to an earth ground at one end or the other of the cable run.

NOTE