CHAPTER 5: Technical Reference
5.Technical Reference
5.1Power-Source Indicators
The Phantom Feed light indicates the presence and polarity of battery power. In NORMal mode, the Test Set verifies that the terminal’s transmit pairs are positive and its receive pairs are negative. In REVerse mode, the Test Set verifies that the opposite (transmit negative and receive positive) is true.
See Figure
The presence and polarity of Power Source 2 (Auxiliary Power), using pins
7 and 8, can be determined by the AUX LED. Normally, Pin 7 should be negative and pin 8 should be positive.
The maximum current consumption in Phantom Power (PS1) and Auxiliary Power (PS2) is approximately 5 mA at 34 VDC and 8.3 mA at 56 VDC.
POWER SOURCE 1 (PHANTOM FEED)
POWER SOURCE 2 (AUXILIARY POWER)
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| 3 | 3 |
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| TRANS. | REC. |
6.6K | Ω |
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| 6 | 6 |
GREEN | RED |
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| 5 | 5 |
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| REC. | TRANS. |
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| 4 | 4 |
| 6.6K | Ω | 8 | 8 |
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GREEN | RED |
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| 7 | 7 |
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| POWER FEED |
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| CURRENT CONSUMPTION: |
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| APPROX. 5mA @ 34 VDC |
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| APPROX. 8.3mA @ 56 VDC |
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| 7' LOOP |
NETWORK + TERMINAL
| POWER |
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| SOURCE | 1 |
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- |
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+ |
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| AUX. |
POWER 2 |
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| FEED | ||
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- |
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PHANTOM
FEED
Figure 5-1. Power source indicators.
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