The PHOENIX CONTACT part 2900321 is a PLC-INTERFACE specifically designed for railway applications. It includes a basic terminal block with a convenient push-in connection and a plug-in miniature relay featuring multi-layer gold contacts. The device is designed to operate within a voltage range of 0.7 times UN to 1.25 times UN, ensuring reliable performance. With a temperature class TX rating of -40°C to +70°C, this PLC-INTERFACE is well-suited for harsh environmental conditions commonly found in railway applications. The device offers a 1 PDT (single pole, double throw) output configuration and operates at an input voltage of 24 V DC.