page_title: APC Smart-UPS
section_title: SmartSlot card models
hierarchical_section_title: APC Smart-UPS / Data interfaces / SmartSlot card models
caption_attribution_description: English: An APC Smart Slot card AP9617 sitting on top of an APC Smart-UPS SMT1500I, showing the differences in slot keying between those two versions of the Smart Slot interface (AP9617 uses an older version, while SMT1500I uses a newer version).
context_page_description: The Smart-UPS is a series of enterprise-level uninterruptible power supplies made by American Power Conversion. Most of the units have a SmartSlot which accepts an optional interface card providing features ranging from network connectivity to temperature and humidity monitoring. With the exception of RT and SRT series, Smart-UPS units are line-interactive UPS systems, only running their inverters when the grid power is unavailable.
context_section_description: In late 2009, with the release of the SMT and SMX product lines, SmartSlot was migrated to a new communications platform utilizing the APC Microlink protocol.  Both electrical and mechanical (slot keying) properties of the new SmartSlot make older SmartSlot cards incompatible with current Smart-UPS models.  For example, current (as of April 2015) Smart-UPS model SMT1500 is compatible only with AP9613, AP9620, AP9630 and AP9631 SmartSlot cards.
  This new card/slot design is referred-to as "Network Management Card 2" or NMC2.  However, most NMC2 cards (including AP9613, AP9630 and AP9631) are backward compatible with older Smart-UPS models.
  In 2019, APC released Network Management Card 3 or NMC3 (AP9640/AP9641), superseding NMC2 cards. NMC 3 offers enhanced security (Security chip onboard), faster communication (1000BASE/T) and increased space for data and event logs.
caption: An AP9617 SmartSlot Network Management Card sitting on top of a Smart-UPS SMT1500I, showing the differences in slot keying
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