Johnson Controls Digital Temperature Controller A421ABC-04C, 120/240 VAC, SPDT, Nema 1

The a421 series controls are single stage, line-voltage electronic temperature controls with a single-pole, double-throw (spdt) output relay. these can be used to control a wide variety of single-stage refrigeration or hvac equipment with an ambient temperature range of -40 to 212°f. model a421abc-04c features standard type 1 (nema) ip20 high-impact plastic enclosure suitable for surface or din rail mounting and rated for either 120 or 240 vac. includes a99bb-400c ptc temperature sensor with a 2 in. standard probe and 13.1 ft. pvc cable. control front panel lcd basic and advanced programming menu on/off temperature adjustment switch-activated temperature setback adjustable anti-short cycle delay adjustable sensor offset optional restricted adjustment mode sensor failure mode.