Banner Engineering MRB-B3-4 Relay Logic Module

MRB-B3-4 Relay Logic Module is Banner Engineering’s MRB-compatible logic block that pairs with the MRB control base to deliver a B3-4 photoelectric amplifier/relay logic function for Banner photoelectric sensors. Designed for 115 VAC operation, this module integrates conditioning and relay logic inside Banner’s modular sensor family, enabling light- or dark-operated behavior to match the sensing conditions. When mounted in the MRB base, the B3-4 module processes the conditioned signal from a Banner photoelectric amplifier and provides discrete relay outputs to drive downstream devices or controller inputs, simplifying wiring and panel space. It is commonly used on conveyor, packaging, and automation lines where a beam presence or interruption must trigger a defined machine action, while allowing configurable logic timing and operation through the MRB chassis. For setup, ensure the MRB base is powered for 115 VAC and select the appropriate light/dark mode to suit the application’s beam status; the combination of MRB base and B3-4 module offers a compact, plug-in solution for reliable sensing and control without additional peripheral logic. Whether upgrading an existing Banner installation or building a new modular sensor system, the MRB-B3-4 provides a proven path to integrate photoelectric sensing with straightforward relay-control logic.