COM300 Voice Communication Modem
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| G | 12V |
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Logan, Utah |
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| SW 12V CTRL | G | 12V | CS I/O |
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| POWER | |||
SE | 7 | 8 | 9 | 10 | 11 | 12 |
| SW 12V |
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| IN |
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DIFF |
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G G | H | L AG H | L | AG H | L AG E3 AG G G | 5V 5V G | G |
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| CR10X WIRING PANEL |
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| MADE IN USA |
SE | 1 | 2 | 3 | 4 | 5 | 6 | SDM |
DIFF | 1 |
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G G | H | L AG H | L | AG H | L AG E1 AG E2 G | P1 G P2 G C8 C7 C6 C5 C4 C3 C2 C1 G 12V 12V | |
EARTH GROUND
WIRING
PANEL NO.
CAMPBELLCOM300
SCIENTIFIC
INC.VOICE SYNTHESIZER
Complies with Part 68, FCC rules. FCC Registration No.
This equipment complies with the requirements in Part 15 of FCC Rules for Class A
computing device. Operation of this equipment in a residential area may cause unacceptable interference to radio and TV reception requiring the operator to take whatever steps are necessary to correct the interference.
S/N 0002 | MADE IN USA |
SC12 Cable
TIP | RING | GND |
Blue = Ring
Burial Phone Cable
Phone Line
To Earth Ground Transient Protector
(Model 6362 or
FIGURE 3. COM300 Hardware Connection to CR10X Using Surge
Protection Device (No Standard RJ11 Connection Available)
3.2 Properly Grounding the COM300 System
Connect the green 14 awg grounding wire (provided with the COM300) to the grounding terminal (GND) on the COM300 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.
CAUTION The modem must be grounded for its transient protection to work.
3.3 Powering the COM300 Modem
More recent Campbell Scientific dataloggers provide 12 VDC power on pin 8 of the CS I/O 9 pin connector. For dataloggers that do not provide 12 VDC on the datalogger's CS I/O 9 pin connector, 12 VDC and ground must be connected via the green power connector on the side of the COM300 (refer to Figure 4). Table 1 lists the Campbell Scientific dataloggers that require direct 12 VDC connection to the COM300.
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