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D-4 SPARC Enterprise M8000/M9000 Servers Service Manual • October 2012
D.4 Power Supply Conditions
TABLE D-2 and TABLE D-3 show the power supply conditions of the UPC interface.
D.4.1 Input Circuit
Note – Limit the signal line chattering period to 1 ms.
D.4.2 Output Circuit
TABLE D-2 Input Power Supply Conditions
Signal Name Input Conditions
*BPS/*UALM
*BTL
*ACOFF
No voltage relay contact
Contact rating DC 12 V, 10 mA or greater (0.5 A maximum)
Use of a gold-plated contact or reed relay is recommended.
TABLE D-3 Output Power Supply Conditions
Signal Name Output Conditions
ER Output voltage VOH DC 3.1 V (minimum)
VOL DC 0 - 0.4 V (maximum)
Output current IOH -4 mA (maximum)
IOL 4 mA (maximum)