i am successfully done the connection of ignition with beckhoff CX8091 and EL3404 via OPC-UA. But this beckhoff device is too much expensive,. Can anyone now tell me that, is there any replacement of beckhoff CX8091 and El3404 with the same specifications and advantages (siemens, wago, schneider, B&R)or there is no replacement of this device. please guide me