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AP9620 Legacy Communications Card (LCC) Compatibility


AP9620 Legacy Communications Card (LCC) Purpose, Compatibility and Installation Requirements

Product Line
  • UPS Device Management
    • AP9620 - Legacy Communications Card

  • Micro-link UPS installations including UPSs with the following model prefixes:
    • SMX
    • SMT
    • SRT (with LCC firmware v3.0 or higher)
    • SURTD*
      • *Excluding Split Phase RT models, indicated by a P in their model number


For customers of Smart UPS units with the prefix SURTD*, SMX, SMT, and SRT the ability to communicate with APC's historical UPS-Link or APC proprietary USB usages no longer exist. While APC's recommendation remains using the latest version of APC UPS management solutions, we recognize that some customers may have chosen other options.


The following UPS management solutions require the Legacy Communications SmartSlot Card (AP9620):
  • Custom applications
    • using the historical UPS-Link serial communications
    • using APC proprietary USB usages
    • NOTE: Custom applications that use industry standard USB power summary usages does not require the AP9620. The UPS alone supports this functionality, See knowledge base article FA156602.
  • Windows Operating System embedded UPS support
    • using serial communications
    • NOTE: Use of USB communications does oes not require the AP962. The UPS alone supports this functionality. See knowledge base article FA156602.
  • APCUPSd (or other open source tools)
    • using serial communications
      • Newer versions of APCUPSd now support understanding Modbus to talk to Modbus enabled Micro-link units. Refer to APC Application Note #176 for details on supported UPS models.
    • NOTE: Use of USB communications does not require the AP9620. The UPS alone supports this functionality. See knowledge base article FA156602.
  • An operating system no longer supported by APC's PowerChute Business Edition
  • Custom applications which require DB9 simple signaling cable using pin 3 and pin 6

The chart below lists UPS by model number prefix unless otherwise specified.
LCC Compatibility Matrix
Supported UPS Families/Models  Compatibility Notes
 • Check the specific UPS model via the front LCD on the unit or model number sticker. For full compatibility, the latest UPS firmware update must be applied. Refer to the APC UPS Firmware Update Wizard for the latest version for your UPS. The APC UPS Firmware Update Wizard and other valuable UPS firmware information can be found in knowledge base article FA164737.

 • Includes all variations for voltage configuration, rackmount models, and tower models in all locales.
• Compatability is fully supported
• Requires LCC firmware version 3.0 or higher
Communication will be lost to the embedded NMC 

 •*SURTD split phase models are not supported. They are indicated by a P in their part number, such as SURTD6000RMXLP3U
 • Requires UPS Firmware 5.1 or later. In order to check your UPS firmware version, access to the UPS serial port is required.
 • Includes all variations for voltage configuration and models available in all locales.

 • SURTD models do not support the AP9620's USB port functionality, only the DB-9 serial output.
 • Compatibility is fully supported.

How to find your SMT/SMX UPS firmware version:
Use the About menu on the LCD display on the front of the UPS. Refer to the user's manual on how to navigate the LCD if you need assistance.
The LCC disables features in the host UPS that are not supported by legacy UPS systems (switched outlets, multiple simultaneous communication ports, etc.) This is due to the limitations of the legacy communication protocol.

  • The LCC does NOT put the LCD in read only mode
  • The LCC turns off the Switched Outlet Group menus so that you cannot control individual outlets
  • You still have full UPS control via the front panel and can still write configuration settings. The settnigs are limited to the legacy communication protocol values due to the LCC.
  • The LCC does not adjust the standard/advanced mode setting of the LCD, so some menus will not appear in standard mode regardless of LCC presence.

Please refer to the attached document for the expected functionality of the LCC with each unit mentioned above. For the most up to date functionality information, please refer to the AP9620 User's Guide.

UPS and Accessory incompatability
  • The card is not compatible (and not needed) with any other SmartUPS models EXCEPT for the aforementioned models above. The card's bracket has metal tabs that will prevent insertion into the SMartSlot housing of an incompatible UPS. If you do somehow forcibly install the card, it will give you a solid red status LED that indicates communication has failed and that the LCC is incompatible with the UPS. Also, it will disrupt any communication between any other installed accessories downstream. It will not affect the UPS operation. 
  • The Legacy Communications Card does not support any other accessories attached to it such as an Expansion Chassis (AP9600) or a Triple Chassis (AP9604/AP9604BLK/AP9604S)
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