The MTL5514D is a proximity detector interface from the MTL5500 series, featuring a single-channel design with dual outputs. It includes built-in fault detection for phase reversal and operates as an isolating interface unit. The device requires a 7-9 VDC supply for the sensor and provides two single-pole relay outputs with changeover contacts. It is designed for DIN rail mounting and operates with a 20-35 VDC power supply.