Features: 16-Channel High-Speed Multiplexer 250 ch/s scanning Two- and four-wire scanning Built-in thermocouple reference junction The Agilent 34902A employs reed relays to achieve scan rates up to 250 channels-per-second. 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. Note: Not recommended for connection to AC-line without external transient suppression.