32-Channel Form C / Form A Switch Module for 34980A The Agilent (now 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) 5 A 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 300 V, 1 A contacts and can handle up to 60W, and the Form A channels are 30 V DC / 250 V AC, 5 A contacts and can handle up to 150 W. Standard 50-pin Dsub connectors allow for use with standard cables, terminal blocks, or mass interconnect solutions. 28 Form C channels up to 1 A, 60 W 4 Form A channels up to 5 A, 150 W Latching armature relays, with relay counter Temperature sensor for overheating conditions Simultaneous channel switching