16-Channel Reed Multiplexer Module for 34970A The Agilent (now Keysight) 34902A Reed Multiplexer Module is a 16 Channel Multiplexer designed for use with the 34970A Data Acquisition/Switch Unit. Employs reed relays to achieve scan rates up to 250 ch/s. Use this module for high-throughput automated test applications as well as high-speed data logging and monitoring tasks. Sixteen two-wire inputs switch up to 300 V. Two- and four-wire channels may be mixed on the same module. User provided shunt resistors are required for current measurements. Built-in thermocouple reference junction.