Bosch B901 Door Access Control Module

The Bosch B901 Door Access Control Module is a fully supervised, addressable SDI/SDI2 bus device that integrates with Bosch compatible panels. It supports direct interface to 26-bit Wiegand card readers and provides four distinct door states: Locked, Unlocked, Secured, and Fire Unlock.

This module offers flexible access control with 14 programmable authority levels, which can be managed by user level, group, time of day, system state, and armed area status. It includes a supervised onboard point, a buzzer output, and inputs for Request to Exit and Request to Enter, with an optional shunt-only setting.