Transcription of A421 Series Electronic Temperature Controls
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A421 Series Electronic Temperature Controls
The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls Controls , Inc. shall not be liable for damages resulting from misapplication or misuse of its products. 2015 Johnson Controls , 44 Code No. LIT-1900933A421 Series Electronic Temperature ControlA421 Series Electronic Temperature ControlsSingle-Stage Electronic Temperature ControlsDescriptionThe A421 Series Electronic Temperature Controls are single-stage Controls with a single-pole, double-throw (SPDT) output relay. A421 Controls feature a bright backlit LCD with adjustable brightness and a three-button touchpad interface that can be set up to restrict user adjustments.
temperature setback, and sensor offset capability. The temperature control range is-40 to 212°F or -40 to 100°C. The A421 controls are available either in Type 1 (NEMA), IP20 (CE), high-impact plastic enclosures suitable for surface or DIN rail mounting or in Type 4X (NEMA), IP67 (CE) watertight, corrosion resistant surface mount enclosures.
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