Rockwell Automation Inc., Milwaukee, has agreed to acquire the assets and business of Xi’An Hengsheng Science & Technology Co., a privately held engineering firm based in China. Financial terms were not disclosed.

Xi’An Hengsheng Science & Technology serves the electrical power and other heavy process industries in China, including customers in the power, petrochemical, coal mining, chemical and oil markets. The company’s management team and 85 employees will join Rockwell.

Rockwell said the acquisition will expand its reach in the regions of middle and western China. The company expects to complete the acquisition during the first calendar quarter of 2009, pending closing conditions.