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At this point, one may be curious and wonder why the 5400-series plug-ins cannot be | At this point, one may be curious and wonder why the 5400-series plug-ins cannot be | ||
used in the 5100-series mainframes. A close look at the interface connector on | used in the 5100-series mainframes. A close look at the [[5000 Series plug-in interface|interface connector on | ||
both series will show that the 5400-series has two extra power supply voltages, | both series]] will show that the 5400-series has two extra power supply voltages, | ||
±15 V on interface connector pins 6A and 6B. 5400-series plug-ins will not find those | ±15 V on interface connector pins 6A and 6B. 5400-series plug-ins will not find those | ||
two supply voltages in a 5100-series mainframe, so they will not operate correctly. | two supply voltages in a 5100-series mainframe, so they will not operate correctly. |