A421AEC-02C | Single Stage Temp Controller with Sensor, 120/240VAC, NEMA4X, 6' 7" lead, -40 to 212F, HTG/CLG | JOHNSON

Electronic Temperature Control: Johnson A421AEC-02C Ensure precise temperature regulation with the Johnson A421AEC-02C Single Stage Temperature Control. Engineered for demanding industrial environments, this controller features: Versatile Temperature Range: Monitor and control temperatures from -40°F to 212°F. Robust Construction: UL Type 4x, IP66 enclosure provides protection against dust, moisture, and corrosion. Easy Installation: Includes a 2m (6'-6") temperature sensor for convenient placement. SPDT Contacts: Control heating or cooling systems with single-pole, double-throw contacts. The Johnson A421AEC-02C is designed for 120/240 Vac operation, replacing the A419AEC-2C model. Its reliability and accuracy make it an essential solution for precise temperature control in industrial settings. Shop our HVAC supply store Now! Count on our HVAC supply store for unbeatable prices and fast shipping on industrial components. Trust us to keep your operations running smoothly.

Features and benefits

Control front panel LCD

Displays the temperature, parameters, and status. You can adjust the backlight intensity for ambient light conditions. Custom icons display the system and control status.

Basic and Advanced programming menu

Provides two levels of parameter adjustment and control. You can set up advanced features in one menu and easily adjust basic parameters in the other menu.

On/Off temperature adjustment

Select the temperature values at which the relay turns On and Off, which automatically defines the Heating or Cooling mode of operation.

Switch-activated temperature setback

Shift the On or Off temperature by an adjustable setback value. When a user-supplied switch closes the binary input control circuit, the control operates at the defined setback temperatures.

Adjustable anti-short cycle delay

Select the minimum time the output relay remains off before the next on cycle; avoiding short cycling, hard starts, and nuisance overload outages on compressors and other inductive applications.

Adjustable sensor offset

Adjust the displayed temperature to the actual sensed temperature.

Optional restricted adjustment mode

Restrict the On or Off adjustment to your defined temperature range.

Sensor failure mode

Select the relay On or Off state in the event of a sensor or sensor wire failure.

Backlight brightness level

Adjust the LCD backlight intensity.