working with multipel serial devices?

What is a IMU, wiki suggests:-
IMU may refer to:

  • Inertial measurement unit
  • Initial markup
  • Interactive Member Universal
  • Interactive Marketing Unit
  • International Mathematical Union
  • International Medical University
  • Interurban Multiple Units used by Citytrain
  • Islamic Movement of Uzbekistan
  • Italian Mathematical Union

That is a lot of devices to monitor, have you any information about the traffic and data rate? That is a lot of serial inputs, do you need outputs as well?
Without further information the answer would have to be no.