Technical Parameters Category Specification Model MTL5511 Product Type Zener Diode Safety Barrier (for Digital Inputs) Certification ATEX, IECEx, etc. (for Intrinsic Safety) Application Protection of digital (discrete) input circuits. Number of Channels Single channel. Key Safety Parameters Voltage (Um) 250 V AC/DC (Maximum voltage allowed in the safe area) Open-Circuit Voltage (Uoc) 28 V (Maximum voltage the barrier can present to the hazardous area) Short-Circuit Current (Isc) 93 mA (Maximum current the barrier can deliver to the hazardous area) Entity Approval Typically suitable for Group IIC hazardous gases. Installation Must be installed in a safe area with a dedicated, certified IS earth ground (earth return) connection. Wiring Simple two-wire connection (in-series with the signal line). Housing Typically a blue plastic module for DIN rail mounting.
