Johnson Controls A421ABC-02 Electronic Temperature Control [Refurbished]

The Johnson Controls A421ABC-02 is a single-stage electronic temperature control from the A421 series, with a single-pole double-throw (SPDT) output relay. It is the line-voltage Type 1 model, in a Type 1 (NEMA) IP20 standard enclosure for DIN rail or surface mounting, rated for 120/240 VAC.

Setup is done from a three-button touchpad against a backlit LCD, with basic and advanced programming menus. Useful features for refrigeration and process duty are built in: an anti-short cycle delay to protect compressors, switch-activated temperature setback, an adjustable sensor offset to trim the reading against a reference thermometer, and a restricted adjustment mode that locks the setpoint against casual changes once commissioned.

* Brand / Manufacturer: Johnson Controls (PENN)
* Model Number: A421ABC-02
* Series: A421 Series Standard Electronic Temperature Control
* Type: Single-stage electronic temperature control
* Output: SPDT relay
* Setpoint Range: -40 to 212°F (-40 to 100°C)
* Display: Adjustable backlit LCD with three-button touchpad
* Enclosure: Type 1 (NEMA), IP20, DIN rail or surface mount
* Supply Voltage: 120/240 VAC
* Sensor Included: A99BB-200C with 6.6 ft (2.0 m) cable
* Features: Anti-short cycle delay, switch-activated setback, adjustable sensor offset, restricted adjustment mode

Typical applications include refrigeration and coldroom control, food service and beverage equipment, process heating and cooling, and general commercial temperature control.. Johnson Controls. Johnson Controls. A421ABC-02.