Siemens 6ES7155-6AA02-0BN0 Interface Module | 28.8V Industrial PLC I/O Module The Siemens 6ES7155-6AA02-0BN0 Interface Module is a reliable industrial automation component designed to support efficient communication and flexible integration within modern PLC-based control systems. As part of the Siemens SIMATIC automation family, this interface module provides a dependable connection between automation controllers and distributed I/O systems. Key Features and Benefits