require 'net/ssh'

ssh_opts = {
    :host_name=>"19.09.20.18",
    :user=>"manual-ace",
    :password=>"42bike24",
    :port=>1800,
    :auth_methods=>["password"],
}

Net::SSH.start(nil, nil, ssh_opts) do |ssh|
  psw = "TEst$1234".encode("UTF-8")
  p ssh.exec!("ruby path/to/receiver.rb #{psw}")
end

ARGV.each do |my_str|
  p my_str # OUTPUT: "TEst234"
end