The sensor output buffer I / O module, Bentley, insulation inside the terminal I / O module, Bentley cables, insulated external terminal I / O modules, non-insulated internal terminal I / O module, Bentley module, non-insulated external terminals with barrier I / O modules, the internal terminal 4-channel relay 3500/32 IO module 1) light emitting diode to indicate the relay channels of Case 2) for the relay contacts connected to the terminal external device 3) control switch relay contacts how to work 4) 4-channel relay and I / O modules Shenyang Empire _ _ Bentley Bentley monitoring provided by the Shenyang Automation Equipment Co., Ltd. Empire. Empire Shenyang Automation Equipment Co., Ltd. (www.syepe.net) located Tiexi District of Shenyang Xinghua North Street 18 A 1404. Scraps and development in the wave of market economy, the current Empire Shenyang Automation Equipment Co., Ltd. has a high reputation in the industrial automation control systems and equipment, and enjoys a good reputation. Empire Shenyang Automation Equipment Co., Ltd. made the whole network business alliance certification, marking our service and management level has reached a new height. Empire Shenyang Automation Equipment Co., Ltd. all employees willing to work with all people of insight and common development, for a better future.