Loading ...

| Smart-UPS & Symmetra LX / RM

Home » Spaces » Smart-UPS & Symmetra LX / RM » discussion » General » SMT3000RM2U how do I connect serial cable to manually power on and off?

SMT3000RM2U how do I connect serial cable to manually power on and off?

Discussion in Smart-UPS & Symmetra LX / RM started by Charles , 3/22/2017 7:36 PM
Login to follow, share, and participate in this space.
Not a member?Join now
Posted in: General

SMT3000RM2U how do I connect serial cable to manually power on and off?

Subscribe to RSS
  • chucke

    Hi everyone,

    I'm looking to control (if possible) my SMT3000RM2U via the serial cable in terms of turning it on after a power failure and then when the utility power returns, to turn it off.

    I found this post by Angela: http://forums.apc.com/spaces/5/smart-ups-symmetra-lx-rm/forums/general/9407/turn-on-surt8000xl-remotely

    which details pins 7,8 & 9 as being for this purpose, but the serial port on my SMT3000RM2U is RJ48 so I would like to know how to translate the above 7-8-9 connection to RJ48 connector.

    Also- Angela mentions that the connection as a momentary (240ms) connection. What would the UPS do if the connection was constant in one state or the other (like a relay would create)?

    Greatly appreciate your time!


  • liamg

    Hi Charles - 

    Next generation Smart-UPS (anything with an LCD screen) use a different communications protocol and cable pin-out than legacy products. You can get all the details in this application note: http://www.apc.com/salestools/MPAO-9E5RB5/MPAO-9E5RB5_R1_EN.pdf

    Hope that helps,


  • chucke

    Liam- Thank you! Exactly what I was looking for. Good day!


  • LillaVictor

    Hi...in my case after replacing the batteries, the unit works fine, except for one thing. Whenever I plug in a Serial Data Cable into the back of the unit, and THEN plug it into a Serial Port, the UPS shuts down, or it simply will not start. With just the cable plugged into the UPS, and the other end unplugged, it runs or starts fine. I even tried a Serial to USB Adapter, and the same thing happens. I just bought a generic Serial Cable, and not this one, since it appears to be just a generic cable.


    printed circuit board

  • MattK

    Hi Lilla


    The cable required is actually a smart signalling cable APC part no. 940-0625A  rather than a generic serial cable.





Page 1 of 1 (5 items)
Choose your language:  
powered by Communifire
Version 7.0.7496.13049