#05AB1E, 4 bytes

Çbðý

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Explanation:

Ç     # Convert the (implicit) input-string to a list of unicode values
 b    # Convert each integer to a binary string
  ðý  # Join by spaces (and output the result implicitly)

Could be just the first two bytes if a list output is allowed, or 3 bytes with » if a newline delimiter instead of space delimiter is allowed.

05AB1E, 4 bytes

Çbðý

Try it online.

Explanation:

Ç     # Convert the (implicit) input-string to a list of unicode values
 b    # Convert each integer to a binary string
  ðý  # Join by spaces (and output the result implicitly)

Could be just the first two bytes if a list output is allowed, or 3 bytes with » if a newline delimiter instead of space delimiter is allowed.