User`s guide
Table Of Contents
- About This Guide
- Kit Contents and System Requirements
- About Your RAID Controller
- Standard RAID Controller Features
- Adding Enhanced Features
- Adding a Battery Backup Module
- Upgrading the Controller Firmware
- About the Adaptec 3085
- About the Adaptec 3405
- About the Adaptec 3805
- About the Adaptec 31205
- About the Adaptec 31605
- About the Adaptec 4000
- About the Adaptec 4800SAS
- About the Adaptec 4805SAS
- About the Adaptec 2420SA
- About the Adaptec 2820SA
- About the Adaptec 2130SLP
- About the Adaptec 2230SLP
- Getting Started
- Installing the Controller and Disk Drives
- Creating a Bootable Array
- Installing the Driver and an Operating System
- Installing the Driver on an Existing Operating System
- Managing Your Storage Space
- Solving Problems
- Introduction to Serial Attached SCSI
- Understanding RAID
- Using the Adaptec RAID Configuration Utility
- Using the Array Configuration Utility for DOS
- Using the Adaptec Flash Utility
- Adaptec Serial Controller LED and I2C Connector Reference
- Adaptec 2420SA Activity LED and I2C Connector Specification
- Adaptec 2820SA Activity LED and I2C Connector Specification
- Adaptec 3085 LED and I2C Connector Specification
- Adaptec 3405 LED and I2C Connector Specification
- Adaptec 3805 LED and I2C Connector Specification
- Adaptec 31205 LED and I2C Connector Specification
- Adaptec 31605 LED and I2C Connector Specification
- Adaptec 4800SAS LED and I2C Connector Specification
- Adaptec 4805SAS LED and I2C Connector Specification
- Safety Information
- Technical Specifications
- Index

Appendix F: Adaptec Serial Controller LED and I2C Connector Reference ● 112
Adaptec 2420SA Activity LED and I2C Connector Specification
● Adaptec 2420SA LED Board Connector: Molex 53398-0490 or equivalent
● LED Mating Cable Connector: Molex 51021-0400 or equivalent
J11:
Note:
Board circuitry supports COMMON ANODE backplane implementations
● Adaptec 2420SA Activity LED Board Connector: Molex 22-28-8022 2.54mm 1x2 RA
Header or equivalent
● LED Mating Cable Connector: Molex 50-57-9002 or equivalent
J1:
● Adaptec 2420SA I2C Board Connector: Molex 22-43-6030 or equivalent
● I2C Mating Cable Connector: Molex 22-43-3030 or equivalent
J14:
2169300JA-R AAR-2420SA/JA ROHS KIT
2169300-R AAR-2420SA ROHS KIT
2169400-R AAR-2420SA/256MB ROHS SGL
Pin Number Signal Description
1 LP0- PORT 0 Cathode
2 LP1- PORT 1 Cathode
3 LP2- PORT 2 Cathode
4 LP3- PORT 3 Cathode
Pin Number Signal Description
1
EX_LED Aggregate Cathode
4
+3.3V Aggregate Anode
Pin Number Signal Description
1 IIC_EM_DATA I2C Data
2 GND Ground
3 IIC_EM_CLK I2C Clock