Dell PowerFlex R750 Owner's Manual page 30

Table 21. 24 x 2.5-inch SAS/SATA with dual controller, expander, fPERC, and APERC in Riser 2
From
SIG_PWR_1 (system board power connector)
APERC_CTRL_SRC_SA1 (adapter PERC controller
connector)
SIG_PWR_2 (system board power connector)
SL3_CPU1_PB2 (signal connector on system board)
Figure 32. 24 x 2.5-inch SAS/SATA + 2 x 2.5-inch SAS with expander and fPERC
Table 22. 24 x 2.5-inch SAS/SATA + 2 x 2.5-inch SAS with expander and fPERC
From
SIG_PWR_1 (system board power connector)
CTRL_SRC_SB1 (fPERC controller connector)
SIG_PWR_2 (system board power connector)
SL3_CPU1_PB2 (signal connector on system board)
SIG_PWR_0 (system board power connector)
SRC_SA1 (backplane expander signal connector)
30 Component installation guidelines
To
BP_PWR_1 (backplane power connector)
DST_SB1 (backplane expander signal connector)
BP_PWR_2 (backplane power connector)
CTRL_DST_PA1 (fPERC input connector)
To
BP_PWR_1 (backplane power connector)
DST_SB1 (backplane expander signal connector)
BP_PWR_2 (backplane power connector)
CTRL_DST_PA1 (fPERC input connector)
BP_PWR_1 (rear backplane power connector)
BP_DST_SA1 (rear backplane expander signal connector)