Omron E3X-SD21 Photoelectric Switch Amplifier

The Omron E3X-SD21 Photoelectric Switch Amplifier is a fiber optic sensor amplifier that processes signals from fiber optic sensors in industrial automation, enabling precise object presence, position sensing, and counting. Used in packaging machines, electronics manufacturing, material handling, and automated inspection systems, it is part of the E3X Series and supports 12 to 24 VDC supply, NPN control output, high-speed response in the microsecond range, digital sensitivity adjustment with a dual digital display, and pre-wired or connector-type connections depending on model. It can be mounted on DIN rail or panel, offers IP50 protection, operates from -25°C to +55°C, and includes short-circuit and reverse polarity protection; a common replacement for Omron E3X-DA21-S.