1SNA645051R0400 is an optocoupler module designed for interface relay applications in the R600 range. This module features a 2 A/DC output rating with a 24 V DC input voltage, providing reliable signal isolation and switching capabilities. The optocoupler module is configured as OBOC 1000-24VDC, enabling safe galvanic isolation between input and output circuits. It is commonly used in control systems, industrial automation, and low-voltage switching applications where electrical isolation and compact integration are required. The module integrates seamlessly into modular rail-mounted systems with standard 12 mm spacing.