Chenbro RM418 Series 6Gb/s 24-port 2.5 Expander Backplane(80H10341802A0, 80H10341803A0, 80H17341801A0), For 24-bay 2.5 Hot-swap HDD Cage - Manual - Manual (Page 7)

Technical Specification
This SAS Expander backplane assembly is including three boards :
80H10341802A0 ( 2.5” 24-port Mini SAS Backplane)
Specification
Host Interface Mini-SAS
HDD Interface SAS
Hot-Swap Yes, allows user to on line replace Hard Disk Drive
Display
LED indicates Hard Disk Drive status
Power LED – Blue (When HDD is present)
Access LED – Green (When HDD is busy)
Error LED – Red (When HDD is error)
Environment Monitor Temperature senor detect(RT1, RT2)
Connectors
1.SAS29 *24
2.Mini-SAS Connector for bridge *8
3.Standard 4P Power connector *6 for +5V, +12V from power
supply
Dimension 419(L) x 81.2(W) x 2.4(H) mm
Material FR4 6 layer
80H10341803A0 ( SAS Expander Daughter Board )
Specification
SAS Expander Chip LSI SAS2 X36 ( 36 ports )
Cooling Four Fan connectors
Connectors
1. Mini-SAS Connector for bridge *8
2. Mini-SAS Connector for RAID card *1
3. Mini-SAS Connector for Cable Link *1
4. Pin Header 2.54mm (2x3) *1, (1x4) *1
5. Wafer 2.54mm Connector 2P *2
6. Wafer 2.5mm Connector 2P *1
Dimension 170(L) x 75(W) x 1.6(H) mm
Material FR4 8 layer