BQLSE is a DC/AC input measurement module designed for the UDM35 modular indicator and controller, featuring 1 channel with selectable measurement ranges for both current and voltage signals. The module provides signal inputs of 0.2-2-20 mA DC/AC and 0.2-2-20 V DC/AC, with an auxiliary excitation output for probe power supply. It delivers 0.1% RDG basic accuracy with TRMS AC measurements from 45 to 65 Hz, temperature drift of ±150 ppm/°C, and input impedance of =2.2 kO for current ranges and =200 kO for voltage ranges. The module supports 3 1/2 digit LED display with 200 ms refresh time at 50 Hz and operates with a sampling rate of 500 samples/s. BQLSE is ideal for industrial process monitoring, control systems, and data acquisition applications requiring accurate multi-range current and voltage measurements with integrated signal conditioning.