A421AEC-02C Johnson Controls Temperature Control

Part number A421AEC-02C from Johnson Controls, listed in Temperature Sensors. KKM Solutions quotes this part with pricing and availability confirmed per order.

Overview The Johnson Controls A421AEC-02C is a line-voltage Type 4X electronic temperature control designed for single-stage heating or cooling applications. It features a watertight, corrosion-resistant NEMA 4X/IP66 enclosure suitable for surface-mount installations and includes an A99BB-200C PTC temperature sensor with a 6.6-foot cable. Features Bright, adjustable backlit LCD screen displaying temperature, parameters, and system status Simple three-button touchpad interface for basic and advanced programming menus Adjustable On and Off temperature setpoints for direct or reverse control actions without repositioning jumpers High and low temperature setpoint adjustment stops to restrict unauthorized user adjustments Adjustable anti-short cycle delay to protect compressors and inductive equipment from short cycling Temperature setback/offset control capability activated via an external switch or timer connected to the binary input Specifications Supply Voltage: 120/240 VAC, 50/60 Hz Output Relay: 1 SPDT dry-contact relay Temperature Control Range: -40°F to 212°F (-40°C to 100°C) Differential Range: 1°F to 30°F Power Consumption: Maximum 1.8 VA Enclosure Rating: NEMA 4X / IP66 watertight thermoplastic Included Sensor: A99BB-200C PTC sensor with 6.6 ft (2.0 m) lead Applications The A421AEC-02C is ideal for commercial and industrial single-stage temperature control applications. It is commonly used in commercial refrigeration equipment like walk-in coolers, reach-in boxes, and display cases, as well as in boiler, chiller, fan, and damper control systems requiring robust environmental protection.