4000 series 1-button audio module for VX2300 system with microphone and integrated 8Ω/2W speaker and full-duplex audio function. Integrated RFID proximity reader (125kHz EM4102) for using up to 1,000 keys of which up to 60 can be programmed directly from the module using the master card supplied. RS-485 Interface. IDC connector for connection via flat cable (supplied) with other optional modules (maximum 8 modules for a total of 42 buttons). 4 LEDs for visual alert of system status: busy, call in progress, start conversation and open door. Acoustic alert for the visually impaired: start conversation and open door. Configurable door opening time and conversation. 1 standard relay with clean contacts C-NO-NC (max 24Vac/dc - 2A) with the possibility of configuring the capacitive discharge for the direct powering of the lock, an open collector output for the activation of a second gate and an input for direct door opening (PTE). Adjustable microphone and speaker levels. Blue LED information card backlighting. Microphone to be housed in the specific compartment of the module holder frames that allows for better sound output even in noisy environments, also eliminating any Larsen effect issues. Satin-finished AISI 316 stainless steel plate (marine grade) that provides durability in installations subject to atmospheric agents and in the vicinity of marine environments. Vandal resistant plate with IK07 and IP65 protection rating. Operating temperature -20°/+60 °C. Power supply by BUS. Simplified configuration of the device through dip-switch or programming kit Cod. 2209. Dimensions: 103x120x43 mm. Encumbrance 1 module.