COM300 Voice Communication Modem
DIFF | AG H L | AG H L AG H L AG E3 AG G G | G G G G 12V 12V | G 12V | SERIAL I/O |
SE | 7 4 8 | 9 5 10 11 6 12 | SWITCHED | POWER |
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| CR10 | |
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| SCIENTIFIC |
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| INC. |
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| MADE IN USA | |
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| SWITCHED | WIRING PANEL NO. | ||
SE | 1 1 2 | 3 2 4 | 5 3 6 | EARTH |
| 12V |
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| CONTROL |
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DIFF | AG H L | AG H L AG H L AG E1 E2 G G |
| G | 5V 5V P1 P2 C8 C7 C6 C5 C4 C3 C2 C1 | |||||
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To Earth
GroundRed 
Black (+12v)
(Ground)
14 AWG Ground Wire
SC12 Cable
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| SCIENTIFIC |
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| SYNTHESIZER |
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Complies with Part | 68, FCC |
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Ringer |
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| Equivalence |
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This equipment |
| 0.5A.Required |
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complies with |
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computing |
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unacceptable |
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w |
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| hatever stepsinterference to radio |
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S/N | 1002 |
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| reception | requiring the |
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| IN USA |
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TIP
RING
GND
G 12V
Telephone Wall
Jack
FIGURE 4. Providing Alternate Power to the COM300
TABLE 1. Dataloggers that Require Direct
12 VDC Connection to COM300
CR10(X) w/ silver wiring panel
CR10(X) w/ black CR10 wiring panel (P/N 8032)
CR500serial number 1764 or lower
3.4 Telephone Service
The goal of the telephone company is to provide you with the best service it can. In order to do this, it may occasionally be necessary for them to make changes in their equipment, operations, or procedures. If you have any questions about your telephone line, such as how many pieces of equipment you can connect to it, the telephone company will provide this information upon request. If the telephone company requests information concerning the equipment which you have connected to your telephone line, the FCC registration number and the ringer equivalence number (REN) of the COM300
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