Audio loudspeaker unit for SB including terminal block. Speech connection with echo cancellation, dust and waterproof loudspeaker, electret microphone and adjustable loudspeaker volume on the front. Microprocessor and DIP switch unit for addressing the subscriber addresses. Integrated electronic door opener function (3A) and additional relay contacts C, NC, NO with 10A. 33V DC supply with power supply unit Art. 1595. For installation in modules Art. 33400 (M), 33401 (M), 33402 (M) and 1250iA. Dimensions: 102x55x38mm.
