Siemens 7SR2103-1MA77-0CA0

The Siemens 7SR2103-1MA77-0CA0 is a non-directional time-overcurrent protection relay designed for reliable monitoring and control in electrical systems. Featuring the ARGUS-M platform within an E8 enclosure, this device supports four current transformers and provides extensive digital input and output capabilities, including 19 binary inputs and 16 binary outputs. Its front panel includes 16 LEDs for clear status indication, while measurement inputs accept standard 1/5 A current signals at 50/60 Hz. The relay operates with a wide auxiliary voltage range—from 24 to 250 V DC and 100 to 230 V AC—ensuring versatile installation options. Connectivity options include a front USB interface for easy configuration and a rear RS485 port for communication with other devices. This Siemens relay, known for its robust design and precise protection functions, is offered through BSP Automation for seamless integration into industrial applications.