A350AA-2 Johnson Controls Electronic Temperature Controller 24VAC SPDT HVAC Control 90-250°F

Description:

• Genuine Johnson Controls electronic on/off temperature controller for HVAC, refrigeration, and industrial temperature control applications
• Operates on 24 VAC with an SPDT relay output for reliable heating or cooling control
• Temperature control range of 90 to 250°F (32 to 121°C)
• Adjustable 1 to 30°F differential for precise temperature regulation
• Field-selectable Heating or Cooling operating mode
• Compatible with Johnson Controls A99B Series PTC silicon temperature sensors (A99BC-25C sensor included with standard control package)
• Front-panel LED indicates relay output status for quick diagnostics
• Can operate as a standalone controller or integrate with System 350 modules including S350 Stage Modules, D350 Display Modules, and Y350R Power Modules
• Surface or 35 mm DIN rail mounting for flexible installation
• Ideal for HVAC systems, refrigeration equipment, chillers, beverage coolers, cooling towers, food storage, and industrial process temperature control
• Discontinued; replaced within the Johnson Controls System 550 family (replacement requires migration of the System 350 assembly because modules are not backward compatible).

Specifications:

• Manufacturer Name: Johnson Controls
• Part Number (MPN): A350AA-2
• Product Series: System 350
• Product Type: Electronic Temperature Controller
• Control Action: On/Off
• Relay Output: SPDT
• Supply Voltage: 20–30 VAC (24 VAC Nominal)
• Temperature Range: 90 to 250°F (32 to 121°C)
• Adjustable Differential: 1 to 30°F
• Operating Modes:
  • Heating
  • Cooling
• Compatible Sensor: A99B Series PTC Silicon Temperature Sensor
• LED Status Indicator: Yes
• Mounting:
  • Surface Mount
  • 35 mm DIN Rail
• Enclosure Rating: NEMA 1
• Operating Temperature: -30 to 150°F (-34 to 66°C)
• Storage Temperature: -40 to 185°F (-40 to 85°C)
• Humidity: 0–95% RH, Non-Condensing
• Applications:
  • HVAC Systems
  • Refrigeration Equipment
  • Beverage Coolers
  • Cooling Towers
  • Chillers
  • Food Storage
  • Industrial Temperature Control

Dimensions:

• Height: 5.00 in (127 mm)
• Width: 2.40 in (61 mm)
• Depth: 2.38 in (61 mm)

Weight:

• Approximate Weight: 0.45 kg (0.99 lb).