The Keysight 34937A is a general-purpose switch module for the 34980A Multifunction Switch/Measure Unit. It has 28 independent single-pole, double-throw (SPDT) 1A relays and 4 single-pole, single-throw (Form A) 5A relays. This module is used to cycle power to products under test, control indicator and status lights, and to actuate external power relays and solenoids. The Form C channels are 300V, 1A contacts and can handle up to 60W, and the Form A channels are 30VDC/250VAC, 5A contacts and can handle up to 150W. Standard 50-pin Dsub connectors allow for use with standard cables, terminal blocks, or mass interconnect solutions.