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6.11.1 Verify -48VDC
The following procedure verifies –48VDC.
Turn on breaker, or insert fuse for control frame A side –48VDC power source.
1.
Check for nominal –48VDC at the control frame fuse and alarm panel A side test
2.
point.
For test points used see
Figure 6-56
Figure 6-57
Repeat
3.
Repeat
4.
and miscellaneous frames.
This completes the procedure.
Figure 6-56
Note:
Input voltage range is -40 VDC to -57.5 VDC.
Test Points 1U FAP (P/N 870-2804-01)
Test Points 3U FAP (P/N 870-2320-03)
1
and 2for the control frame B side –48VDC power source.
1
and 2for each –48VDC A side and B side power source for all extension
and
Figure
6-57.
Chapter 6
–48VDC Power Source
6-110
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