498 Upgrade and Maintenance Manual  TX2550 M4
5ROC
Connector for Dual microSD 64GB Enterprise 
cable
6 USB3.0 FRONT Front USB connector
7 PWR 1-4 Power connectors for HDD backplanes
8 I2C2 not used
9 PWR ODD Power ODD
10 FP 2 Front panel connector (Front panel on QRL)
11 INTR Intrusion switch connector
12 FRONTPANEL1 Front panel connector
13 USB INT not used
14 VPP CPU2 Connector for VPP cable (e.g. Retimer controller)
15 VPP CPU1 Connector for VPP cable (e.g. Retimer controller)
16 FAN 1 - FAN 12  FAN connectors
17 OOB FRONT OOB connector for HDD backplane
18 HDD LED 1-2
Connector for HDD LED cables (e.g. PRAID 
EP5xi)
19 SATA 0-3 SATA HDD connector
20 SATA 4-7 SATA HDD connector
21 SATA ODD SATA connector for ODD
22 TPM Connector for optional TPM
23 M.2 SSD1 Slot 1 for M.2
24 M.2 SSD2 Slot 2 for M.2
25 SERIAL Connector for Serial Interface
26 micro SD Slot for iRMC micrsoSD card
27 VROC not used
28 PSU1 Power connector for PSU1
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