Product Overview

The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc.
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A421 Series Electronic Temperature Controls (Continued)
Single-Stage Electronic Temperature Controls
Selection Chart
A421 Electronic Temperature Control Selection Chart
Product Code
Number
Description
A421ABC-02C Line-Voltage Type 1 Electronic Temperature Control: Type 1 (NEMA), IP20 standard enclosure for DIN rail and surface-mount
applications. Rated for 120/240 VAC.
Includes an A99BB-200C temperature sensor with 6 ft 7-1/5 in. (2.0 m) cable.
A421ABC-03C Line-Voltage Type 1 Electronic Temperature Control: Type 1 (NEMA), IP20 standard enclosure for DIN rail and surface-mount
applications. Rated for 120/240 VAC.
Includes an A99BB-300C temperature sensor with 9 ft 9 in. (3.0 m) cable.
A421ABC-04C Line-Voltage Type 1 Electronic Temperature Control: Type 1 (NEMA), IP20 standard enclosure for DIN rail and surface-mount
applications. Rated for 120/240 VAC.
Includes an A99BB-400C temperature sensor with 13 ft 1-1/5 in. (4.0 m) cable.
A421ABC-06C Line-Voltage Type 1 Electronic Temperature Control: Type 1 (NEMA), IP20 standard enclosure for DIN rail and surface-mount
applications. Rated for 120/240 VAC. Includes an A99BB-400C temperature sensor with 19 ft 6 in. (6.0 m) cable.
A421AEC-01C Line-Voltage Type 4X Electronic Temperature Control: Type 4X (NEMA), IP67 weathertight enclosure for surface-mount applications.
Rated for 120/240 VAC.
Includes an A99BB-25C temperature sensor with 9-7/8 in. (0.25 m) cable.
A421AEC-02C Line-Voltage Type 4X Electronic Temperature Control: Type 4X (NEMA), IP67 weathertight enclosure for surface-mount applications.
Rated for 120/240 VAC.
Includes an A99BB-200C temperature sensor with 6 ft 7-1/5 in. (2.0 m) cable.
A421GBF-02C Low-Voltage Type 1 Electronic Temperature Control: Type 1 (NEMA), IP20 standard enclosure for DIN rail and surface-mount
applications. Rated for 24 VAC Class 2, Safety Extra Low Voltage.
Includes an A99BB-200C temperature sensor with 6 ft 7-1/5 in. (2.0 m) cable.
A421GEF-01C Low-Voltage Type 4X Electronic Temperature Control: Type 4X (NEMA), IP67 weathertight enclosure for surface-mount applications.
Rated for 24 VAC Class 2, Safety Extra Low Voltage (SELV).
Includes an A99BB-25C temperature sensor with 9-7/8 in. (0.25 m) cable.
A421GEF-02C Low-Voltage Type 4X Electronic Temperature Control: Type 4X (NEMA), IP67 weathertight enclosure for surface-mount applications.
Rated for 24 VAC Class 2 (SELV).
Includes an A99BB-200C temperature sensor with 6 ft 7-1/5 in. (2.0 m) cable.
A99 Temperature Sensors Compatible with the A421 Control
1
1. When any A99 Series Temperature Sensor is connected to a standard temperature A421 Control model, the range of usable values is -40 to 212ºF
(-40 to 100ºC).
Product Code
Number
Description
A99BA-200C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 6 ft 7-1/5 in. (2.0 m) shielded PVC cable;
Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)
A99BB-25C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 9-7/8 in. (0.25 m) PVC cable;
Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)
A99BB-200C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 6 ft 7-1/5 in. (2.0 m) PVC cable;
Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)
A99BB-300C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 9 ft 9-3/5 in. (3.0 m) PVC cable;
Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)
A99BB-400C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 13 ft 1-1/5 in. (4.0 m) PVC cable;
Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)
A99BB-600C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 19 ft 8-2/5 in. (6.0 m) PVC cable;
Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)
A99BC-25C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 9-7/8 in. (0.25 m) high-temperature silicon cable; Ambient operating
temperature range: -40 to 248ºF (-40 to 100ºC)
A99BC-100C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 3 ft 3-3/5 in. (1.0 m) high-temperature silicon cable; Ambient operating
temperature range: -40 to 248ºF (-40 to 120ºC)
A99BC-300C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 9 ft 9-3/5 in. (3.0 m) high-temperature silicon cable; Ambient operating
temperature range: -40 to 248ºF (-40 to 120ºC)
A99BC-500C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 16 ft 4-4/5 in. (5.0 m) high-temperature silicon cable; Ambient operating
temperature range: -40 to 248ºF (-40 to 120ºC)
A99BC-1500C PTC Temperature Sensor: Standard probe 2 in. (5.1 cm) with 49 ft 2-2/5 in. (15.0 m) high-temperature silicon cable; Ambient operating
temperature range: -40 to 248ºF (-40 to 120ºC)
A99CB-200C PTC Temperature Sensor: Extended probe 6 in. (15.2 cm) with 6 ft 7-1/5 in. (2.0 m) PVC cable;
Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)
A99CB-600C PTC Temperature Sensor: Extended probe 6 in. (15.2 cm) with 19 ft 8-2/5 in. (6.0 m) PVC cable;
Ambient operating temperature range: -40 to 212ºF (-40 to 100ºC)